Sockets
Relays
Sockets
RU/RR/RH/RM/RY & Latch Relays
General-purpose electromechanical relays
Relay sockets for mounting in three ways
(04/10/25)
Relay Selection Guide
Category
Universal Relay
Power Relay
RU
RR
Type
• DPDT, 10A contact
• Miniature size
General
• 4PDT, 6A contact
• Miniature size
• 4PDT, 3A contact
• Bifurcated contact type
• SPDT, 10A contact
• Heavy duty power relay
Appearance
Pin Terminal
Type No.
—
—
—
—
Blade Terminal
RU2S
RU4S
RU42S
RR1BA-U
PC Board Terminal
RU2V
RU4V
RU42V
—
Contact Configuration
Contact Material
DPDT
4PDT
4PDT
SPDT
Silver alloy
Gold-clad silver
Gold-clad silver-nickel
Silver
20
≈
10
Contact
10A
10A
8
Maximum Capacity (A)
6A
6
3A
4
2
250V AC, 3A
30V DC, 3A
250V AC, 3A
30V DC, 3A
110V AC, 10A
220V AC, 7.5A
30V DC, 10A
24, 100 (100-110), 110
(110-120), 200 (200220), 220 (220-240)V AC
6, 12, 24, 48, 100, 110V
DC
6, 12, 24, 50, 100, 110, 115, 120,
200, 220, 230, 240V AC
6, 12, 24, 48, 110V DC
Rated Load
(resistive load)
250V AC, 10A
30V DC, 10A
Rated Voltage
24, 100 (100-110), 110 (110-120), 200 (200-220),
220 (220-240)V AC
6, 12, 24, 48, 110V DC
Power Consumption
(approx.)
1.2 VA (60Hz)
1W
2.5 VA (60Hz)
1.5W
Pickup Voltage
(against rated values)
AC: 80% max., DC: 80% max.
AC: 80% max., DC: 80% max.
Coil
Dropout Voltage
(against rated values)
AC: 30% min., DC: 10% min.
AC: 30% min., DC: 15% min.
Contact Resistance
∗1
50 mΩ max.
30 mΩ max.
Operate Time
∗2
20 ms max.
25 ms max.
Release Time
∗2
20 ms max.
25 ms max.
100 MΩ min. (500V DC megger)
100 MΩ min. (500V DC megger)
Insulation Resistance
Life
Dielectric
Strength
Mechanical
AC type: 50,000,000 operations min.
DC type: 100,000,000 operations min.
50,000,000 operations min. 10,000,000 operations min.
Electrical
100,000 operations min.
100,000 operations min.
Between contact and coil
2500V AC, 1 minute
Between same-pole contacts
200,000 operations min.
200,000 operations min.
2000V AC, 1 minute
1000V AC, 1 minute
1000V AC, 1 minute
Operating Temperature
Simple type: –55 to +70°C, Others: –55 to +60°C (no freezing)
–25 to +40°C (no freezing)
Operating Humidity
5 to 85% RH (no condensation)
5 to 85% RH (no condensation)
SU2S-11L, SM2S-05A,
SM2S-05C, SM2S-05D
SU4S-11L, SY4S-05A, SY4S-05C, SY4S-05D
SR3B-05
SR3B-51
DIN rail mount
Applicable
Sockets
Panel mount
SM2S-51
SY4S-51
PC board mount
SM2S-61
SY4S-61
Dimensions (H × W × D mm)
—
35 × 21 × 27.5
47.5 × 36 × 36
Weight (approx.)
35g
82g
Approvals
UL, c-UL, TÜV, CE
UL, CSA
See Page
8
15
Note: The above table shows initial values.
∗1: Measured using 5V DC, 1A voltage drop method
∗2: Mearured at the rated voltage (25°C)
2
(04/10/25)
Relay Selection Guide
Power Relay
Power Relay
RR
RH
• DPDT, 3PDT; 10A contact
• Heavy duty power relay
• SPDT, DPDT, 3PDT, 4PDT; 10A contact
• Miniature size
RR2P-U
RR3P-U
RR3PA-U
—
RR2BA-U
RR3B-U
RH1B-U
RH2B-U
RH3B-U
RH4B-U
—
—
RH1V2-U
RH2V2-U
RH3V2-U
RH4V2-U
DPDT
3PDT
SPDT
Silver
—
DPDT
—
3PDT
—
4PDT
Silver cadmium oxide
10A
10A
110V AC, 10A
220V AC, 7.5A
30V DC, 10A
110V AC/
30V DC, 10A
220V AC, 7A
110V AC/30V DC, 10A
220V AC, 7.5A
6, 12, 24, 50, 100, 110, 115, 120, 200, 220,
230, 240V AC
6, 12, 24, 48, 110V DC
6, 12, 24, 50, 100, 110,
115, 120, 200, 220, 230,
240V AC
6, 12, 24, 48, 100, 110V
DC
6, 12, 24, 50, 100-110,
110-120, 200-220,
220-240V AC
6, 12, 24, 48, 100-110V
DC
6, 12, 24, 50, 100, 110, 115, 120, 200, 220, 230,
240V AC
6, 12, 24, 48, 100, 110V DC
2.5 VA (60Hz)
1.5W
1 VA (60Hz)
0.8W
1.2 VA (60Hz)
0.9W
1.7 VA (60Hz)
1.5W
AC: 80% max., DC: 80% max.
AC: 80% max., DC: 80% max.
AC: 30% min., DC: 15% min.
AC: 30% min., DC: 10% min.
30 mΩ max.
50 mΩ max.
25 ms max.
20 ms max.
25 ms max.
25 ms max.
20 ms max.
25 ms max.
100 MΩ min. (500V DC megger)
100 MΩ min. (500V DC megger)
10,000,000 operations min.
50,000,000 operations min.
200,000 operations min.
200,000 operations min.
Pin terminal:
Blade terminal:
2000V AC, 1 minute
1500V AC, 1 minute
2000V AC, 1 minute
500,000 operations min.
1000V AC, 1 minute
1000V AC, 1 minute
–25 to +40°C (no freezing)
–25 to +50°C (no freezing)
5 to 85% RH (no condensation)
5 to 85% RH (no condensation)
2 VA (60Hz)
1.5W
200,000 operations min.
–25 to +40°C (no freezing)
SR2P-05A, SR2P-06A,
SR3P-05A, SR3P-06A, SH1B-05A
SR2P-05C
SR3P-05C
SH1B-05C
SR3B-05
SH2B-05A
SH2B-05C
SH2B-05D
SH3B-05A
SH3B-05C
SH4B-05A
SH4B-05C
SR2P-511, SR2P-70
SR3B-51
SH1B-51
SH2B-51
SH3B-51
SH4B-51
SH1B-62
SH2B-62
SH3B-62
SH4B-62
SR3P-511, SR3P-70
SR3B-51
—
—
55.5 × 29 × 36
55.5 × 36 × 36
35.6 × 14 × 27.5
35.6 × 21 × 27.5
35.6 × 31 × 27.5
35.6 × 41 × 27.5
90g (pin terminal)
96g (pin terminal)
24g
37g
50g
74g
UL, CSA, TÜV, CE
UL, CSA, TÜV, CE
15
(04/10/25)
19
3
Relay Selection Guide
Category
Miniature Relay
Miniature Relay
RM
RY
Type
• DPDT, 5A contact
• Miniature lightweight relay
General
• DPDT, 4PDT; 3A or 5A contact
• 1A bifurcated contact also available
Appearance
Pin Terminal
Type No.
RY2S-U
RY4S-U
RY22S-U
RY4V-U
RY22V-U
—
Blade Terminal
RM2S-U
PC Board Terminal
RM2V-U
RY2V-U
Contact Configuration
DPDT
DPDT
Contact Material
Silver
Gold-clad silver
DPDT
(bifurcated)
4PDT
Silver palladium
20
≈
10
Contact
8
Maximum Capacity (A)
6
5A
5A
4
3A
2
Coil
1A
Rated Load
(resistive load)
110V AC, 5A
220V AC, 5A
30V DC, 5A
110V AC/30V DC, 3A
220V AC, 3A
Rated Voltage
6, 12, 24, 50, 100-110, 200220, 220-240V AC
6, 12, 24, 48, 100-110V DC
DPDT: 6, 12, 24, 50, 100, 110, 115, 120, 200, 220, 230, 240V AC
6, 12, 24, 48, 100, 110V DC
4PDT: 6, 12, 24, 50, 100-110, 110-120, 200-220, 220-240V AC
6, 12, 24, 48, 100-110V DC
Power Consumption
(approx.)
1.2 VA (60Hz)
0.9W
1 VA (60Hz)
0.8W
Pickup Voltage
(against rated values)
AC: 80% max., DC: 80% max.
AC: 80% max., DC: 80% max.
Dropout Voltage
(against rated values)
AC: 30% min., DC: 10% min.
AC: 30% min., DC: 10% min.
Contact Resistance
∗1
30 mΩ max.
50 mΩ max.
Operate Time
∗2
20 ms min.
20 ms min.
Release Time
∗2
1.2 VA (60Hz)
0.9W
110V AC/30V DC, 1A
220V AC, 0.8A
1 VA (60Hz)
0.8W
100 mΩ max.
20 ms min.
20 ms min.
100 MΩ min. (500V DC megger)
100 MΩ min. (500V DC megger)
Mechanical
50,000,000 operations min.
50,000,000 operations min.
Electrical
500,000 operations min.
200,000 operations min.
• 100,000 operations min.
• 200,000 operations min.
(220V AC, 3A)
200,000 operations min.
Between contact and coil
2000V AC, 1 minute
1500V AC, 1 minute
2000V AC, 1 minute
1500V AC, 1 minute
Between same-pole contacts
1000V AC, 1 minute
1000V AC, 1 minute
Insulation Resistance
Life
Dielectric
Strength
240V AC, 5A
30V DC, 5A
Operating Temperature
–25 to +50°C (no freezing)
–25 to +55°C (no freezing)
Operating Humidity
45 to 85% RH (no condensation)
45 to 85% RH (no condensation)
DIN rail mount
SM2S-05A
SM2S-05C
SM2S-05D
SY2S-05A
SY2S-05C
SY4S-05A
SY4S-05C
SY4S-05D
SY2S-05A
SY2S-05C
Panel mount
SM2S-51
SY2S-51
SY4S-51
SY2S-51
PC board mount
SM2S-61
SM2S-62
SY2S-61
SY4S-61
SY4S-62
SY2S-61
Applicable
Sockets
Dimensions (H × W × D mm)
35.6 × 21 × 27.5
35.6 × 14 × 27.5
35.6 × 21 × 27.5
35.6 × 14 × 27.5
Weight (approx.)
35g
23g
34g
23g
Approvals
UL, CSA, TÜV, CE
See Page
26
UL, CSA, TÜV, CE
29
Note: The above table shows initial values.
∗1: Measured using 5V DC, 1A voltage drop method
∗2: Mearured at the rated voltage (25°C)
4
(04/10/25)
Relay Selection Guide
Latch Relay
RR2KP
RH2L
• DPDT; 10A contact
• Midget power latch relay
• With a mechanical operation indicator
• DPDT; 10A contact
• Dual coil latch relay
RY2KS
• DPDT; 3A contact
• Dual coil latch relay
RR2KP-U
—
—
—
RH2LB-U
RY2KS-U
—
RH2LV2-U
—
DPDT
DPDT
DPDT
Silver
Silver cadmium oxide
Gold-plated silver
10A
10A
3A
110V AC/10A, 220V AC/7.5A
30V DC/10A, 100V DC/0.5A
110V AC/10A, 220V AC/7.5A
30V DC/10A
110/220V AC, 3A
30V DC, 3A
100V DC, 0.2A
6, 12, 24, 50, 100, 110, 115, 120, 200, 220, 230,
240V AC
6, 12, 24, 48, 110V DC
6, 12, 24, 50, 100, 120V AC
6, 12, 24V DC
6, 12, 24, 50, 100, 120V AC
6, 12, 24, 48, 100, 110V DC
2.2 VA (60Hz)
1.5W
Set coil:
1.2 VA (60Hz), 2W
Reset coil: 0.5 VA (60Hz), 0.9W
1.5 VA (60Hz)
1.2W
Set voltage: 80% max.
Set voltage: 80% max.
Set voltage: 80% max.
Reset voltage: 80% max.
Reset voltage: 80% max.
Reset voltage: 80% max.
30 mΩ max.
50 mΩ max.
50 mΩ max.
Set time:
Set time: 20 ms max.
30 ms max. (AC)
20 ms max. (DC)
Set time: 25 ms max.
Reset time: 20 ms max.
Reset time: 30 ms max. (AC)
20 ms max. (DC)
Reset time: 25 ms max.
100 MΩ min. (500V DC megger)
100 MΩ min. (500V DC megger)
100 MΩ min. (500V DC megger)
5,000,000 operations min.
10,000,000 operations min.
5,000,000 operations min.
500,000 operations min.
200,000 operations min.
200,000 operations min.
1500V AC, 1 minute
2000V AC, 1 minute
1500V AC, 1 minute
1000V AC, 1 minute
1000V AC, 1 minute
700V AC, 1 minute
–5 to +40°C (no freezing)
–5 to +40°C (no freezing)
–5 to +40°C (no freezing)
45 to 85% RH (no condensation)
45 to 85% RH (no condensation)
45 to 85% RH (no condensation)
SR3P-05A
SR3P-05C
SR3P-06A
SH3B-05A
SH3B-05C
SY4S-05A
SY4S-05C
SR3P-511
SR3P-70
SH3B-51
SY4S-51
—
SH3B-62
SY4S-61
SY4S-62
80.5 × 36 × 36
35.6 × 31 × 27.5
55.3 × 21 × 27.5
170g
50g
67g
UL, CSA
UL, CSA
34
(04/10/25)
UL, CSA
36
38
5
Operating Instructions
Operating Instructions
Driving Circuit for Relays
Protection for Relay Contacts
1. To make sure of correct relay operation, apply the rated
voltage to the relay coil.
1. The contact ratings show the maximum values. Make
sure that these values are not exceeded at any instant.
When an inrush current flows through the load, the contact may be welded. If this is the case, connect a contact
protection circuit, such as a current limiting resistor.
2. Input voltage for the DC coil:
A complete DC voltage is best for the coil power to make
sure of stable relay operation. When using a power supply
containing a ripple voltage, suppress the ripple factor
within 5%. When power is supplied through a rectification
circuit, the relay operating characteristics, such as pickup
voltage and dropout voltage, depend on the ripple factor.
Connect a smoothing capacitor for better operating characteristics as shown below.
Pulsation
Smoothing
capacitor
+
–
Emin Emax Emean
R Relay
DC
Emax – Emin
×100%
Emean
Emax = Maximum of pulsating current
Emin = Minimum of pulsating current
Emean = DC mean value
2. Contact protection circuit:
When switching an inductive load, arcing causes carbides
to form on the contacts, resulting in an increased contact
resistance. In consideration of contact reliability, contact
life, and noise suppression, use of a surge absorbing circuit is recommended. Then, note that the release time of
the load becomes slightly longer. Check the operation
using the actual load. Incorrect use of a contact protection
circuit will adversely affect the switching characteristics.
Four typical examples of contact protection circuits are
shown in the following table:
Ripple factor (%) =
TE
R
Power
Incorrect
Diode
Varistor
Vin
4. Leakage current while relay is off:
When driving an element at the same time as the relay
operation, a special consideration is needed for the circuit
design. As shown in the incorrect circuit below, a leakage
current (Io) flows through the relay coil while the relay is
off. The leakage current causes the coil release failure or
adversely affects the vibration resistance and shock resistance. Design the circuit as shown in the correct example.
R
Ind. Load
This protection circuit can be used for
DC load power circuits. Use a diode
with the following ratings.
Reverse withstand voltage:
Power voltage of the load circuit × 10
Forward current:
More than the load current
Ind. Load
This protection circuit can be used for
both AC and DC load power circuits.
For a best result, when using on a
power voltage of 24 to 48V AC/DC,
connect a varistor across the load.
When using on a power voltage of 100
to 240V AC/DC, connect a varistor
across the contacts.
+
Power
D
–
Power
Varistor
3. Do not use a contact protection circuit as shown below:
Correct
R
TE
C
Power
Io
5. Surge suppression for transistor driving circuits:
When the relay coil is turned off, a high-voltage pulse is
generated, causing the transistor to deteriorate and
sometimes to break. Be sure to connect a diode to suppress the counter electromotive force. Then, the coil
release time becomes slightly longer. To shorten the coil
release time, connect a Zener diode between the collector
and emitter of the transistor. Select a Zener diode with a
Zener voltage slightly higher than the power voltage.
Counter emf
suppressing diode
+
–
6
Ind. Load
This protection circuit can be used for
both AC and DC load power circuits.
R: Resistor of approximately the same
resistance value as the load
C: 0.1 to 1 µF
EAC
EAC
R
Ind. Load
C
Load
Vin
C R
RC
Power
3. Operating the relay in synchronism with AC load:
If the relay operates in synchronism with the AC power
voltage of the load, the relay life may be reduced. If this is
the case, select a relay in consideration of the required
reliability for the load. Or, make the relay to turn on and off
irrespective of the AC power phase or near the point
where the AC phase crosses zero voltage.
This protection circuit can be used
when the load impedance is smaller
than the RC impedance in an AC load
power circuit.
R: Resistor of approximately the same
resistance value as the load
C: 0.1 to 1 µF
R Relay
C
Power
Load
Load
This protection circuit is very effective in arc suppression when opening the contacts. But, the capacitor is charged while the contacts are opened. When
the contacts are closed, the capacitor is discharged
through the contacts, increasing the possibility of
contact welding.
This protection circuit is very effective in arc suppression when opening the contacts. But, when the
contacts are closed, a current flows to charge the
capacitor, causing contact welding.
Generally, switching a DC inductive load is more difficult
than switching a DC resistive load. Using an appropriate
arc suppressor, however, will improve the switching characteristics of a DC inductive load.
Soldering
1. When soldering the relay terminals, use a soldering iron
of 30 to 60W, and quickly complete soldering within
approximately 3 seconds.
2. Use a non-corrosive rosin flux.
(04/10/25)
Operating Instructions
Other Precautions
1. General notice:
• To maintain the initial characteristics, do not drop the relay
or apply shocks to the relay.
• The relay housing cannot be removed from the base during normal operation. To maintain the initial characteristics, do not remove the relay housing.
• Use the relay in environments free from condensation of
dust, sulfur dioxide (SO2), and hydrogen sulfide (H2S).
• Make sure that the coil voltage does not exceed the applicable coil voltage range.
2. When connecting outputs to electronic circuits:
When the output is connected to a load which responds
very quickly, such as an electronic circuit, contact bouncing causes incorrect operation of the load. Take the following measures into consideration.
• Connect an integral circuit.
• Suppress the pulse voltage due to bouncing within the
noise margin of the load.
3. UL- and CSA-approved ratings may differ from the product rated values determined by IDEC depending on
approval agents and local situations.
4. Do not use the relays in the vicinity of strong magnetic
field sources, which may affect relay operation.
Safety Precautions
• Turn off the power to the relay before starting installation,
removal, wiring, maintenance, and inspection of the
relays. Failure to turn power off may cause electrical shock
or fire hazard.
Precautions for the RU Relays
• Observe the specifications and rated values, otherwise
electrical shock or fire hazard may be caused.
• Do not use the latching lever as a switch. The durability of
the latching lever is a minimum of 100 operations.
• Use wires of the proper size to meet the voltage and current requirements. Tighten the terminal screws on the
relay socket to a proper tightening torque.
• When using DC loads on 4PDT relays, apply a positive
voltage to terminals of neighboring poles and a negative
voltage to the other terminals of neighboring poles to prevent the possibility of short circuits.
• The surge absorbing element on AC relays with RC or DC
relays with diode is provided to absorb the counter electromotive force generated by the coil. When the relay is subject to an excessive external surge voltage, the surge
absorbing element may be damaged. Add another surge
absorbing provision to the relay to prevent damage.
(04/10/25)
• Before operating the latching lever of the RU relay, turn off
the power to the RU relay. After checking the circuit, return
the latching lever to the original position.
• DC type relays with a diode have a polarity in the coil terminals. Apply the DC voltage to the correct terminals.
7
RU Series Universal Relays
Full featured universal miniature relays
Designed with environment taken into consideration
• Two terminal styles: plug-in and PCB mount
• Non-polarized LED indicator available on plug-in relays
• No internal wires, lead-free construction
• Cadmium-free contacts
• Mechanical flag indicator available on plug-in relays
• Manual latching lever with color coding for AC or DC coil
• Snap-on yellow marking plate; optional marking plates are
available in four other colors
• Maximum contact ratings: 10A (RU2), 6A (RU4), 3A (RU42)
• UL, CSA, c-UL, EN compliant
Standard
UL508
CSA C22.2 No. 14
Mark
CSA C22.2 No. 14
Approval Organization / File No.
UL/c-UL File No. E66043
CSA File No. LR35144
(CSA mark is printed on bifurcated
contact types only)
TÜV Product Service
EN61810-1
Self declaration
(EC Low Voltage Directive)
With Latching Lever
Mechanical Indicator
The contact position can be confirmed
through the file small windows.
Lever in the Latched Position
Marking Plate
Standard yellow marking plate is easily
replaced with optional marking plates in four
colors for easy identification of relays.
Latching Lever
Using the latching lever, operation can be
checked without energizing the coil. The latching
lever is color coded for AC and DC coils.
AC coil: Orange
DC coil: Green
In Normal Operation
LED Indicator
Non-polarized green LED indicator is
standard provision for plug-in terminal,
latching lever types
Note: Turn off the power to the relay coil when using
the latching lever. After checking the operation,
return the latching lever in the normal position.
Without Latching Lever
AC/DC Color Marking
For identification of AC or DC coils.
AC coil: Yellow
DC coil: Blue
Mechanical Indicator
Marking Plate
LED Indicator
Non-polarized green LED indicator is
standard provision for plug-in terminal
types, except for simple types.
8
AC Coil
DC Coil
(04/10/25)
RU Series Universal Relays
Types
• Single Contact Type
Termination
Latching Lever
With Latching Lever
Plug-in Terminal
(Note 1)
Without Latching Lever
PCB Terminal
Without Latching Lever
Type
Type No.
DPDT
Coil Voltage Code ∗
4PDT
Standard
RU2S-∗
RU4S-∗
With RC (AC coil only)
With diode (DC coil only)
With diode (DC coil only)
Reverse polarity coil
RU2S-R-∗
RU2S-D-∗
RU4S-R-∗
RU4S-D-∗
A24, A100, A110, A200, A220
D6, D12, D24, D48, D110
A100, A110, A200, A220
D6, D12, D24, D48, D110
RU2S-D1-∗
RU4S-D1-∗
D24
Standard
RU2S-C-∗
RU4S-C-∗
With RC (AC coil only)
With diode (DC coil only)
With diode (DC coil only)
Reverse polarity coil
Simple (Note 2)
Simple (Note 2)
RU2S-CR-∗
RU2S-CD-∗
RU4S-CR-∗
RU4S-CD-∗
A24, A100, A110, A200, A220
D6, D12, D24, D48, D110
A100, A110, A200, A220
D6, D12, D24, D48, D110
RU2S-CD1-∗
RU4S-CD1-∗
D24
RU2S-NF-∗
RU2V-NF-∗
RU4S-NF-∗
RU4V-NF-∗
A24, A100, A110, A200, A220
D6, D12, D24, D48, D110
• Bifurcated Contact Type
Termination
Latching Lever
With Latching Lever
Plug-in Terminal
(Note 1)
Without Latching Lever
PCB Terminal
Without Latching Lever
Type
Type No.
4PDT
Coil Voltage Code ∗
Standard
RU42S-∗
With RC (AC coil only)
With diode (DC coil only)
With diode (DC coil only)
Reverse polarity coil
RU42S-R-∗
RU42S-D-∗
A24, A100, A110, A200, A220
D6, D12, D24, D48, D100, D110
A100, A110, A200, A220
D6, D12, D24, D48, D100, D110
RU42S-D1-∗
D24
Standard
RU42S-C-∗
With RC (AC coil only)
With diode (DC coil only)
With diode (DC coil only)
Reverse polarity coil
Simple (Note 2)
Simple (Note 2)
RU42S-CR-∗
RU42S-CD-∗
A24, A100, A110, A200, A220
D6, D12, D24, D48, D100, D110
A100, A110, A200, A220
D6, D12, D24, D48, D100, D110
RU42S-CD1-∗
D24
RU42S-NF-∗
RU42V-NF-∗
A24, A100, A110, A200, A220
D6, D12, D24, D48, D100, D110
Note 1: Plug-in terminal types, except for simple types, have an LED indicator and a mechanical indicator as standard.
Note 2: Simple types do not have an LED indicator, a mechanical indicator, and a latching lever.
Ordering Information
Specify a coil voltage code in place of ∗ in the Type No.
Coil Voltage Code ∗
A24
A100
A110
A200
A220
D6
D12
D24
D48
D100
D110
Coil Rating
24V AC
100-110V AC
110-120V AC
200-220V AC
220-240V AC
6V DC
12V DC
24V DC
48V DC
100V DC
110V DC
Accessory
Name
Marking Plate
Type No.
RU9Z-P∗
Ordering Type No.
RU9Z-P∗PN10
Color Code ∗
A (orange), G (green), S (blue), W (white), Y (yellow)
Package Quantity
10
Note: Specify a color code in place of the Type No. When ordering, specify the Ordering Type No.
The marking plate can be removed from the relay by inserting a flat screwdriver under the marking plate.
(04/10/25)
9
RU Series Universal Relays
Coil Ratings
AC
(50/60 Hz)
Rated Current (mA)
±15% (at 20°C)
Coil
Voltage
Code
Rated Voltage (V)
50 Hz
Coil Resistance (Ω)
±10% (at 20°C)
60 Hz
24
A24
49.3
42.5
100-110
A100
9.2-11.0
7.8-9.0
110-120
A110
8.4-10.0
7.1-8.2
4,550
200-220
A200
4.6-5.5
4.0-4.6
14,080
220-240
A220
4.2-5.0
3.6-4.2
18,230
DC
Operating Characteristics (against rated values at 20°C)
Maximum Continuous
Applied Voltage
Minimum Pickup
Voltage
Dropout Voltage
110%
80% maximum
30% minimum
110%
80% maximum
10% maximum
164
3,460
6
D6
155
40
12
D12
80
160
24
D24
44.7
48
D48
18
2,560
100
D100
9.7
10,000
110
D110
8.9
12,100
605
Note 1: The rated current includes the current draw by the LED indicator.
Note 2: Rated voltage 100V DC is available for the bifurcated contact type only.
Specifications
Contact Ratings
Contact
DPDT
Continu- Allowable Contact Power
ous
Resistive
Inductive
Current
Load
Load
2500VA AC 1250VA AC
300W DC
150W DC
10A
Voltage
(V)
Rated Load
Res.
Load
Contact Material
Contact
Resistance
Minimum
Applicable Load
Operate Time
Release Time
Power
Consumption
Insulation
Resistance
250 AC
10A
5A
30 DC
10A
5A
4PDT
6A
1500VA AC
180W DC
600VA AC
90W DC
250 AC
3A
0.8A
30 DC
3A
1.5A
4PDT
bifurcated
3A
750VA AC
90W DC
200VA AC
45W DC
250 AC
3A
0.8A
30 DC
3A
1.5A
Note 1: On 4PDT relays, the maximum allowable total current of neighboring
two poles is 6A. At the rated load, make sure that the total current of
neighboring two poles does not exceed 6A (3A + 3A = 6A).
Note 2: Inductive load for the rated load — cos ø = 0.3, L/R = 7 ms
• UL and c-UL Ratings
Voltage
Resistive
General Use
Horse Power Rating
RU2 RU4 RU42 RU2 RU4 RU42 RU2
RU4
RU42
250V AC
10A
—
3A
—
6A
—
—
1/10HP
—
30V DC
10A
6A
3A
—
—
—
—
—
—
• CSA Ratings
Resistive
Voltage
RU42
250V AC
3A
30V DC
3A
• TÜV Ratings
Voltage
Resistive
Inductive
RU2 RU4 RU42 RU2 RU4 RU42
250V AC 10A
6A
3A
5A
0.8A
0.8A
30V DC
6A
3A
5A
1.5A
1.5A
10A
Surge Suppressor Ratings
Type
AC Coil
DC Coil
Ratings
With RC
With Diode
RC series circuit
R: 20 kΩ, C: 0.033 µF
Type (Contact)
Ind.
Load
RU2 (DPDT)
Silver alloy
∗1
RU4 (4PDT)
Silver
(gold clad)
RU42 (4PDT)
Silver-nickel
(gold clad)
50 mΩ maximum
24V DC, 5 mA
1V DC, 1 mA
1V DC, 0.1 mA
∗2 (reference value)
∗3 20 ms maximum
∗3 20 ms maximum
AC: 1.1 to 1.4VA (50 Hz), 0.9 to 1.2VA (60 Hz)
DC: 0.9 to 1.0W
100 MΩ minimum (500V DC megger)
Between contact and coil: 2500V AC, 1 minute
Between contacts of different poles:
2500V AC,
2000V AC, 1 minute
Dielectric Strength
1 minute
Between contacts of the same pole:
1000V AC, 1 minute
Operating
Electrical: 1800 operations/h maximum
Frequency
Mechanical: 18,000 operations/h maximum
Vibration
Damage limits:
10 to 55 Hz, amplitude 0.5 mm
Resistance
Operating extremes: 10 to 55 Hz, amplitude 0.5 mm
Damage limits:
1000 m/s2
Shock Resistance
Operating extremes: 150 m/s2
AC: 50,000,000 operations
50,000,000
Mechanical Life
DC: 100,000,000 operations
operations
Electrical Life
∗4 See table below
Operating
Simple types:
–55 to +70°C (no freezing)
Temperature
∗5 Others:
–55 to +60°C (no freezing)
Operating Humidity 5 to 85% RH (no condensation)
Weight
Approx. 35g
Note: Above values are initial values.
∗1: Measured using 5V DC, 1A voltage drop method
∗2: Measured at operating frequency of 120 operations/min (failure rate level
P, reference value)
∗3: Measured at the rated voltage (at 20°C), excluding contact bouncing;
Release time of AC relays with RC:
25 ms maximum
Release time of DC relays with diode: 40 ms maximum
∗4: Contact Load and Electrical Life (at ambient temperature 20°C)
Type
Diode reverse voltage: 1000V
Diode forward current: 1A
Voltage
250V AC
RU2
30V DC
110V DC
250V AC
RU4
30V DC
110V DC
RU42
250V AC
30V DC
110V DC
Resistive Load
10A
5A
10A
5A
0.6A
6
3A
6A
3A
0.65A
0.33A
3A
3A
0.44A
Inductive Load
(cos ø = 0.3, L/R = 7 ms)
5A
2.5A
5A
2.5A
0.4A
2.6A
0.8A
2.7A
1.5A
0.33A
0.18A
0.8A
1.5A
0.22A
Electrical Life
(operations minimum)
100,000
500,000
100,000
500,000
100,000
50,000
200,000
50,000
200,000
50,000
200,000
100,000
100,000
100,000
∗5: Measured at the rated voltage. Simple types include plug-in terminal simple types and all PCB terminal types.
10
(04/10/25)
RU Series Universal Relays
RU2 (DPDT Contact)
• Plug-in Terminal Type
• PCB Terminal Type
• LED indicator, mechanical flag indicator, and marking plate are standard
provisions, except on simple types.
• Available with or without a manual
latching lever
• Simple types have a marking plate.
• Marking plate is a standard provision.
• Not provided with an LED indicator, mechanical flag indicator, and
manual latching lever.
Photo: RU2V-NF-A100
Photo: RU2S-A100
Dimensions
• RU2S
• RU2S-C/RU2S-NF
Color Marking
AC: Yellow
DC: Blue
LED Indicator
(green)
Color Marking
AC: Yellow
DC: Blue
LED Indicator
(green)
(RU2S-C only)
Marking Plate
Removal Slot
0.5
35.0
Marking Plate
Removal Slot
35.0
Marking Plate
Removal Slot
Marking Plate (yellow)
35.0
Mechanical Indicator Window
Marking Plate (yellow)
Latching
Lever
AC: Orange
DC: Green
• RU2V
Mechanical Indicator Window (RU2S-C only)
Marking Plate (yellow)
13.2
14
13
ø1.2 × 2.2 Hole
21.0
21.0
8
12
9
4
5
1
ø1.2 × 2.2 Hole
0.8
2.6
2.6
6.4
0.5
2.6
21.0
14
13
6.4
8
12
9
4
5
1
0.5
4.0
0.5
27.5
27.5
27.5
Mounting Hole Layout
7.0
1
8-ø
les
13.2
Marking plate removal slot is provided only on one side.
Insert a flat screwdriver into the slot to remove the marking plate.
Ho
6.4
12.7
4.1
All dimensions in mm.
Internal Connection (Bottom View)
• RU2S-∗∗ Standard
(1)12
(4)42
• RU2S-∗∗R With RC
(1)12
• RU2S-∗∗D With Diode
(4)42
(1)12
(4)42
• RU2S-∗∗D1 With Diode
Reverse Polarity Coil
(1)12
(5)14
(9)11
(13)A1
(8)44
(12)41
(14)A2
(5)14
(9)11
(13)A1
(8)44
(12)41
(14)A2
24V AC/DC or less
(5)14
(9)11
(13)A1
(4)42
(8)44
(12)41
(5)14
(8)44
(9)11
(12)41
(13)A1
(14)A2
(14)A2
24V DC or less
24V DC
(1)12
(5)14
(4)42
(8)44
(1)12
(5)14
(9)11
(12)41
(9)11
(13)A1
(14)A2
(13)A1
Over 24V AC/DC
(4)42
(8)44
(12)41
(14)A2
• RU2S-NF-∗∗/RU2V-NF-∗∗
(1)12
(5)14
(4)42
(8)44
(9)11
(12)41
(13)A1
(14)A2
Over 24V DC
Blank or C comes in place of ∗ to represent types with or without a latching lever.
(04/10/25)
11
RU Series Universal Relays
Electrical Life Curves
• RU2 (Resistive Load)
• RU2 (Inductive Load)
250V AC/30V DC
110V DC
250V AC
30V DC
110V DC
1000
(× 10,000 operations)
(× 10,000 operations)
1000
100
10
100
10
AC: cos ø = 0.3
DC: L/R = 7 ms
1
0.1
0.5 1
5
1
10
0.1
Load Current (A)
0.5 1
5
10
Load Current (A)
Maximum Switching Current
• RU2
AC resistive
AC inductive
(cos ø = 0.3)
10
Load Current (A)
5
DC resistive
1
DC inductive
L/R = 7 ms
0.1
10
30
100 250 500
Load Voltage (V)
Ambient Temperature vs. Temperature Rise Curves
• RU2 (AC Coil, 60 Hz)
• RU2 (DC Coil)
120
120
110
110
110
100
100
100
90
80
Load current
10A × 2 poles
70
60
50
40
30
Load current
5A × 2 poles
90
80
70
50
40
20
20
10
10
0
10
20
30
40
50
Ambient Temperature (°C)
60
70
Load current
10A × 2 poles
60
30
No load current
Temperature Rise (°C)
120
Temperature Rise (°C)
Temperature Rise (°C)
• RU2 (AC Coil, 50 Hz)
0
Load current
5A × 2 poles
90
80
70
Load current
10A × 2 poles
60
50
40
30
Load current
5A × 2 poles
20
No load current
No load current
10
10
20
30
40
50
60
70
Ambient Temperature (°C)
0
10
20
30
40
50
60
70
Ambient Temperature (°C)
The above temperature rise curves show the characteristics when 100% the rated coil voltage is applied.
The heat resistance of the coil is 120°C. The slant dashed line indicates the allowable temperature rise for the coil at different ambient temperatures.
12
(04/10/25)
RU Series Universal Relays
RU4 (4PDT Contact)
• Plug-in Terminal Type
• PCB Terminal Type
• LED indicator, mechanical flag indicator, and marking plate are standard
provisions, except on simple types.
• Available with or without a manual
latching lever
• Simple types have a marking plate.
• Marking plate is a standard provision.
• Not provided with an LED indicator, mechanical flag indicator, and
manual latching lever.
(RU4)
(RU42)
Photo: RU4V-NF-D24
Photo: RU42S-A100
Dimensions
• RU4S/RU42S
• RU4S-C/RU4S-NF
RU42S-C/RU42S-NF
Mechanical Indicator Window
Marking Plate (yellow)
Color Marking
AC: Yellow
DC: Blue
Color Marking
AC: Yellow
DC: Blue
LED Indicator
(green)
(RU4S-C/
RU42S-C only)
0.5
35.0
Marking Plate
Removal Slot
35.0
Marking Plate
Removal Slot
35.0
Marking Plate
Removal Slot
Marking Plate (yellow)
Mechanical Indicator Window
(RU4S-C/RU42S-C only)
Marking Plate (yellow)
LED Indicator
(green)
Latching
Lever
AC: Orange
DC: Green
• RU4V/RU42V
3-4.4
21.0
14
12
11
10
9
ø1.2 × 2.2 Hole
13
4
3
7
2
6
1
5
21.0
27.5
0.8
2.6
2.6
6.4
0.5
8
6.4
14
12
11
10
9
2.6
ø1.2 × 2.2 Hole
13
4
8
3
7
2
6
1
5
21.0
0.5
4.0
0.5
27.5
27.5
Mounting Hole Layout
7.0
14-
Ho
les
6.4
12.7
4.1
4.4
13.2
Marking plate removal slot is provided only on one side.
Insert a flat screwdriver into the slot to remove the marking plate.
ø1
All dimensions in mm.
Internal Connection (Bottom View)
• RU4S-∗∗/RU42S-∗∗
Standard
(1)12 (2)22
(5)14 (6)24
(3)32 (4)42
(7)34 (8)44
(9)11 (10)21 (11)31 (12)41
• RU4S-∗∗R/RU42S-∗∗R
With RC
(1)12 (2)22
(5)14 (6)24
• RU4S-∗∗D/RU42S-∗∗D
With Diode
(3)32 (4)42
(7)34 (8)44
(9)11 (10)21 (11)31 (12)41
(1)12 (2)22
(5)14 (6)24
(3)32 (4)42
• RU4S-∗∗D1/RU42S-∗∗D1
With Diode
Reverse Polarity Coil
(1)12 (2)22
(3)32 (4)42
(5)14 (6)24
(7)34 (8)44
(7)34 (8)44
(9)11 (10)21 (11)31 (12)41
(9)11 (10)21 (11)31 (12)41
(13)A1
(14)A2
(13)A1
(14)A2
(13)A1
(14)A2
(14)A2
(13)A1
24V AC/DC or less
24V DC or less
24V DC
(1)12 (2)22
(5)14 (6)24
(3)32 (4)42
(7)34 (8)44
(9)11 (10)21 (11)31 (12)41
(13)A1
(14)A2
(1)12 (2)22
(5)14 (6)24
(3)32 (4)42
(7)34 (8)44
(9)11 (10)21 (11)31 (12)41
(13)A1
(14)A2
• RU4S-NF-∗∗/RU4V-NF-∗∗
RU42S-NF-∗∗/RU42V-NF-∗∗
(1)12 (2)22
(5)14 (6)24
(3)32 (4)42
(7)34 (8)44
(9)11 (10)21 (11)31 (12)41
Over 24V AC/DC
Blank or C comes in place of ∗ to represent types with or without a latching lever.
(04/10/25)
Over 24V DC
(13)A1
(14)A2
13
RU Series Universal Relays
Electrical Life Curves
• RU4 (Resistive Load)
1000
250V AC
30V DC
110V DC
1000
(× 10,000 operations)
(× 10,000 operations)
• RU4 (Inductive Load)
250V AC
30V DC
110V DC
100
10
100
10
AC: cos ø = 0.3
DC: L/R = 7 ms
1
1
0.1
0.5 1
3
0.1
6
0.5 1
Load Current (A)
Load Current (A)
• RU42 (Resistive Load)
• RU42 (Inductive Load)
6
250V AC
30V DC
110V DC
(× 10,000 operations)
(× 10,000 operations)
250V AC
30V DC
110V DC
3
100
10
100
10
AC: cos ø = 0.3
DC: L/R = 7 ms
1
1
0.02
0.1
0.5 1
3
0.02
6
0.1
0.5
Load Current (A)
Load Current (A)
Maximum Switching Current
AC resistive
AC inductive
(cos ø = 0.3)
• RU4 (Maximum Load)
AC resistive
AC inductive
(cos ø = 0.3)
• RU42
6
6
3
3
3
1
DC resistive
DC inductive
L/R = 7 ms
0.1
10
30
100
Load Current (A)
6
Load Current (A)
Load Current (A)
• RU4 (Rated Load)
1
DC resistive
DC inductive
L/R = 7 ms
0.1
250 500
10
Load Voltage (V)
30
AC resistive
AC inductive
(cos ø = 0.3)
1
DC resistive
DC inductive
L/R = 7 ms
0.1
10
100 250 500
30
100
250 500
Load Voltage (V)
Load Voltage (V)
Ambient Temperature vs. Temperature Rise Curves
• RU4/RU42 (AC Coil, 50 Hz)
• RU4/RU42 (AC Coil, 60 Hz)
• RU4/RU42 (DC Coil)
110
110
100
100
100
90
80
Load current
6A × 2 poles
70
60
50
40
30
Load current
3A × 4 poles
No load current
90
80
70
50
40
30
20
10
10
10
20
30
40
50
60
Ambient Temperature (°C)
70
Load current
6A × 2 poles
60
20
0
Temperature Rise (°C)
120
110
Temperature Rise (°C)
120
Temperature Rise (°C)
120
0
Load current
3A × 4 poles
90
80
70
Load current
6A × 2 poles
60
50
40
30
Load current
3A × 4 poles
No load current
20
No load current
10
10
20
30
40
50
60
Ambient Temperature (°C)
70
0
10
20
30
40
50
60
70
Ambient Temperature (°C)
The above temperature rise curves show the characteristics when 100% the rated coil voltage is applied.
Load current 6A × 2 poles is for the RU4 types only.
The heat resistance of the coil is 120°C. The slant dashed line indicates the allowable temperature rise for the coil at different ambient temperatures.
14
(04/10/25)
RR Series Power Relays
Heavy-duty power type relays
Large capacity 10A — 1, 2, and 3 poles
• Available in pin and blade terminal styles.
• Options include an indicator, check button for test operation, and side flange.
• DIN rail, surface, and panel mount sockets are available for
a wide variety of mounting applications.
Types
Termination
Type No.
Type
SPDT
DPDT
Coil Voltage Code ∗
3PDT (Note)
Basic
–
RR2P-U∗
★
RR3P-U∗
★
RR3PA-U∗
★
With Indicator
–
RR2P-UL∗
★
RR3P-UL∗
★
RR3PA-UL∗
★
Pin Terminal With Check Button
–
RR2P-UC∗
★
RR3P-UC∗
★
RR3PA-UC∗ ★
With Indicator and
Check Button
–
RR2P-ULC∗ ★
RR3P-ULC∗ ★
RR3PA-ULC∗ ★
Blade
Terminal
Basic
RR1BA-U∗
RR2BA-U∗
RR3B-U∗
–
With Indicator
RR1BA-UL∗
RR2BA-UL∗
RR3B-UL∗
–
With Check Button
RR1BA-UC∗
RR2BA-UC∗
RR3B-UC∗
–
With Indicator and
Check Button
RR1BA-ULC∗
RR2BA-ULC∗
RR3B-ULC∗
–
Side Flange Type
RR1BA-US∗
RR2BA-US∗
RR3B-US∗
–
Note:
Both RR3P and RR3PA are 3PDT relays and have different terminal
arrangements. See Internal Connection on page 17.
Type numbers marked with ★ in the table above are UL-recognized,
CSA-certified, and TÜV-approved. Others are UL-recognized and
CSA-certified.
AC6, AC12, AC24,
AC50, AC100, AC110,
AC115, AC120,
AC200, AC220,
AC230, AC240,
DC6, DC12, DC24,
DC48, DC110
Ordering Information
When ordering, specify the Type No. and coil voltage code.
(Example) RR3P-U
Type No.
AC110
Coil Voltage Code
Coil Ratings
Rated Current (mA) ±15% at 20°C
DC
AC (50/60Hz)
Rated Voltage (V)
(04/10/25)
50Hz
60Hz
Coil Resistance (Ω)
±10% at 20°C
6
490
420
4.9
12
245
210
18
24
121
105
79
50
58
50
350
100
29
25
1,370
110
27
23
1,680
115
25
21.5
1,800
120
24
20.5
2,100
200
14.5
12.5
5,740
220
13.3
11.5
7,360
230
12.7
11
7,830
240
12.1
10.5
8,330
6
240
25
12
120
100
24
60
400
48
30
1,600
110
13
8,460
Operation Characteristics
(against rated values at 20°C)
Max. Continuous
Applied Voltage
Minimum
Pickup Voltage
Dropout Voltage
110%
80%
maximum
30%
minimum
110%
80%
maximum
15%
minimum
15
RR Series Power Relays
Contact Ratings
Continuous
Current
10A
• CSA Ratings
Maximum Contact Capacity
Allowable Contact Power
Rated Load
Resistive
Load
Inductive
Load
1650VA AC 1100VA AC
300W DC
150W DC
Voltage
Resistive
Load
Inductive
Load
110V AC
10A
7.5A
220V AC
7.5A
5A
30V DC
10A
5A
Voltage
Resistive
240V AC
10A
7A
120V AC
10A
7.5A
100V DC
—
0.5A
30V DC
10A
7.5A
• TÜV Ratings
Note: Inductive load for the rated load — cos ø = 0.3, L/R = 7 ms
240V AC
10A
• UL Ratings
30V DC
10A
General use
Horse Power
Raging
10A
7A
1/3 HP
10A
7.5A
1/4 HP
10A
7A
—
Voltage
Resistive
240V AC
120V AC
30V DC
General use
AC: cos ø = 1.0, DC: L/R = 0 ms
Specifications
Contact Material
Silver
∗1
30 mΩ maximum
Operate Time
∗2
25 ms maximum
Release Time
∗2
Contact Resistance
Minimum Applicable Load
24V DC, 10 mA; 5V DC, 20 mA (reference value)
25 ms maximum
AC: 3 VA (50 Hz), 2.5 VA (60 Hz)
DC: 1.5W
Power Consumption
(approx.)
100 MΩ minimum (500V DC megger)
Insulation Resistance
Pin Terminal
Between live and dead parts:
Between contact and coil:
Between contacts of different poles:
Between contacts of the same pole:
1500V AC, 1 minute
1500V AC, 1 minute
1500V AC, 1 minute
1000V AC, 1 minute
Blade Terminal
Between live and dead parts:
Between contact and coil:
Between contacts of different poles:
Between contacts of the same pole:
2000V AC, 1 minute
2000V AC, 1 minute
2000V AC, 1 minute
1000V AC, 1 minute
Dielectric Strength
Operating Frequency
Electrical:
Mechanical:
1800 operations/h maximum
18,000 operations/h maximum
Vibration Resistance
Damage limits:
Operating extremes:
10 to 55 Hz, amplitude 0.5 mm
10 to 55 Hz, amplitude 0.5 mm
Shock Resistance
Damage limits:
Operating extremes:
1000 m/s2
100 m/s2
Electrical Life
200,000 operations (220V AC, 5A)
Mechanical Life
Operating Temperature
10,000,000 operations
∗3
–25 to +40°C (no freezing)
Operating Humidity
5 to 85% RH (no condensation)
Weight (approx.) (Basic type)
RR2P: 90g, RR3P/RR3PA: 96g, RR1BA/RR2BA/RR3B: 82g
Note: Above values are initial values.
∗1: Measured using 5V DC, 1A voltage drop method
∗2: Measured at the rated voltage (at 20°C), excluding contact bouncing
∗3: For use under different temperature conditions, refer to Continuous Load Current vs. Operating Temperature Curve.
16
(04/10/25)
RR Series Power Relays
Internal Connection (Bottom View)
• Basic Type
RR2P-U
4
6
5
3
6
2
(–)
7
(+)
1
RR3PA-U
RR3P-U
5
7
4
8
3
1
8
3
10
(+)
RR1BA-U
7
4
9
2
(–)
8
6
5
11
1
11
• With Check Button
3
1
2
3
5
4
6
4
5
6
8
7
10
(+)
RR3B-U
1
7
9
7
A
B
A
B
A
B
(–)
(+)
(–)
(+)
(–)
(+)
9
2
(–)
RR2BA-U
2
Front
Pushbutton
9
Contacts can be operated by pressing the check
button. Press the button
quickly to prevent arcing.
• With Indicator (-UL type)
Voltage
RR2P
4
5
3
Below 100V
AC/DC
5
6
2
(–)
2
1
5
9
2
(–)
10
(+)
1
3
9
2
(–)
10
(+)
1
4
6
3
9
2
(–)
8
10
(+)
1
11
3
2
3
4
6
4
5
6
7
9
7
8
9
A
B
A
B
A
B
(–)
(+)
(–)
(+)
(–)
(+)
∗
7
8
4
9
3
10
(+)
2
(–)
1
RR3B
1
11
6
5
8
3
7
(+)
2
(–)
7
∗
7
RR2BA
8
11
6
5
7
4
∗
5
1
5
7
3
∗
100V AC/DC
and above
RR1BA
6
8
8
4
RR3PA
6
4
7
(+)
1
RR3P
∗
∗
2
1
3
1
2
3
5
4
6
4
5
6
7
9
7
8
B
(+)
7
A
B
A
B
A
(–)
(+)
(–)
(+)
(–)
9
11
When the relay is energized, the indicator goes on.
∗ The LED protection diode is not contained in relays for below 100V DC.
Characteristics (Reference Data)
• Maximum Switching Capacity
• Electrical Life Curve
AC Load
10.0
AC
resistive
1000
AC
inductive
500
Life (× 10,000 operations)
Load Current (A)
5.0
DC resistive
1.0
DC inductive
0.5
100
110V AC resistive
50
220V AC resistive
110V AC inductive
20
220V AC inductive
1 5
10
30
50
100
10
0.1
200 300
Load Voltage (V)
• Continuous Load Current vs. Operating Temperature Curve
(Basic Type, With Check Button, and Side Flange Type)
0.5
1
Load Current (A)
5
10
DC Load
1000
Operating Temperature (°C)
90
80
70
DC Coil
60
50
AC Coil
40
30V DC
resistive
100
50
20
100V DC resistive
100V DC inductive
30
30V DC inductive
10
0.01
20
10
0
(04/10/25)
Life (× 10,000 operations)
500
100
0.05 0.1
0.5
Load Current (A)
1
5
10
1 2 3 4 5 6 7 8 9 10
Load Current (A)
17
RR Series Power Relays
Dimensions
RR2P-U/RR2P-UL
• Applicable Socket and Hold-down Spring
Total length from panel surface including relay socket
SR2P-05A: 84.5 (87.5) max., SR2P-511: 63 (68) max.
Socket
Mounting Style
6
2
7
DIN Rail Mount Socket
35.6
4 5
3
Type No.
SR2P-05A
SR2P-05C
SR2P-06A
Hold-down
Spring
SR2B-02F1
SFA-202
1 8
9.9
55.5 max.
Panel
Mount
Socket
28.6
13
Dimensions in the ( )
include a hold-down spring.
(Photo: RR2P-U)
RR3P-U/RR3P-UL/
RR3PA-U/RR3PA-UL
w/Solder
Terminals
SR2P-511
w/Wire Wrap
Terminals
SR2P-70
• Applicable Socket and Hold-down Spring
Total length from panel surface including relay socket
SR3P-05A: 84.5 (87.5) max., SR3P-511: 63 (68) max.
Socket
Mounting Style
6
5
7
DIN Rail Mount Socket
8
3
35.6
4
9
2
10
1
9.9
55.5 max.
SR3P-01F1
Panel
Mount
Socket
11
35.6
13
Type No.
SR3P-05A
SR3P-05C
SR3P-06A
w/Solder
Terminals
SR3P-511
w/Wire Wrap
Terminals
SR3P-70
Hold-down
Spring
SR3B-02F1
SFA-202
SR3P-01F1
Dimensions in the ( )
include a hold-down spring.
(Photo: RR3P-U)
4.7
RR1BA-U/RR1BA-UL/
RR2BA-U/RR2BA-UL/
RR3B-U/RR3B-UL
• Applicable Socket and Hold-down Spring
Socket
Mounting Style
3.0 × ø2.0 oblong hole
1
2
Hold-down
Spring
DIN Rail Mount Socket
SR3B-05
SR3B-02F1
SFA-202
Panel Mount Socket
SR3B-51
SR3B-02F1
3
4
5
6
7
8
9
36
0.5
Total length from panel surface including relay socket
SR3B-05: 73 (76) max., SR3B-51: 56 (60) max.
Type No.
(Photo: RR3B-U)
A
B
36
47.5 max.
7.3
Dimensions in the ( )
include a hold-down spring.
RR1BA-US
RR2BA-US
RR3B-US
63.5
3.0 × ø2.0 oblong hole
7.3
11.1
11.1
4.2
47.5 max.
16.1
63.5
4.7
16.0
2-ø4.5 Mounting Holes
1
2
4
5
6
7
8
9
A
B
36
18
3
36
(Photo: RR3B-US)
0.5
73.5
All dimensions in mm.
(04/10/25)
RH Series Power Relays
SPDT through 4PDT, 10A contacts
Midget power type relays
The RH series are miniature power relays with a large
capacity. The RH relays feature 10A contact capacity as
large as the RR series and the same size as IDEC’s miniature relays. The compact size saves space.
PRODUCT SERVICE
Types
Termination
Plug-in
Terminal
SPDT
Type
DPDT
Coil Voltage Code ∗
Type No.
Coil Voltage Code ∗
Type No.
Basic
RH1B-U∗
★
RH2B-U∗
With Indicator
RH1B-UL∗
★ AC6, AC12, AC24, AC50,
AC100-110, AC110-120,
RH2B-UC∗ ★ AC200-220, AC220-240
RH2B-ULC∗ ★ DC6, DC12, DC24, DC48,
DC100-110
RH2B-UT∗
★
Top Bracket Mounting
RH1B-UT∗
★ AC6, AC12, AC24, AC50,
AC100, AC110, AC115, AC120,
AC200, AC220, AC230, AC240
DC6, DC12, DC24, DC48,
DC100, DC110
★
With Diode
(DC coil only)
RH1B-UD∗
★
With Check Button
—
With Indicator and
Check Button
—
DC6, DC12, DC24, DC48,
DC100, DC110
★
RH2B-UL∗
RH2B-UD∗
★
With Indicator and
Diode
(DC coil only)
—
—
RH2B-ULD∗ ★
With Resistor and
Capacitor
(100V AC and over)
—
—
RH2B-R∗
With Indicator and RC
(100V AC and over)
—
—
RH2B-LR∗
Basic
RH1V2-U∗
PC Board
Terminal
AC6, AC12, AC24, AC50,
AC100, AC110, AC115, AC120,
★ AC200, AC220, AC230, AC240 RH2V2-U∗
DC6, DC12, DC24, DC48,
DC100, DC110
With Indicator
—
With Diode
(DC coil only)
RH1V2-UD∗ ★
—
DC6, DC12, DC24, DC48,
DC100, DC110
RH2V2-UL∗
DC6, DC12, DC24, DC48,
DC100-110
AC100-110, AC110-120,
AC200-220, AC220-240
AC6, AC12, AC24, AC50,
AC100-110, AC110-120,
★
AC200-220, AC220-240
DC6, DC12, DC24, DC48,
DC100-110
★
RH2V2-UD∗ ★
DC6, DC12, DC24, DC48,
DC100-110
Type numbers marked with ★ in the table above are UL-recognized, CSA-certified, and TÜV-approved.
Ordering Information
When ordering, specify the Type No. and coil voltage code.
(Example) RH2B-U
Type No.
(04/10/25)
AC100-110
Coil Voltage Code
19
RH Series Power Relays
Types
Termination
Plug-in
Terminal
PC Board
Terminal
3PDT
Type
4PDT
Coil Voltage Code ∗
Type No.
Basic
RH3B-U∗
★
With Indicator
RH3B-UL∗
★
With Check Button
RH3B-UC∗
★
With Indicator and
Check Button
RH3B-ULC∗ ★
Top Bracket Mounting
RH3B-UT∗
With Diode
(DC coil only)
RH3B-D∗
With Indicator and
Diode
(DC coil only)
RH3B-LD∗
Basic
RH3V2-U∗
★
With Indicator
RH3V2-UL∗
★
With Diode
(DC coil only)
RH3V2-D∗
AC6, AC12, AC24, AC50,
AC100, AC110, AC115,
AC120, AC200, AC220,
AC230, AC240
DC6, DC12, DC24, DC48,
DC100, DC110
★
DC6, DC12, DC24, DC48,
DC100, DC110
AC6, AC12, AC24, AC50,
AC100, AC110, AC115,
AC120, AC200, AC220,
AC230, AC240
DC6, DC12, DC24, DC48,
DC100, DC110
DC6, DC12, DC24, DC48,
DC100, DC110
Coil Voltage Code ∗
Type No.
RH4B-U∗
★
RH4B-UL∗
★
RH4B-UC∗
★
RH4B-ULC∗ ★
RH4B-UT∗
★
RH4B-UD∗
★
AC6, AC12, AC24, AC50,
AC100, AC110, AC115,
AC120, AC200, AC220,
AC230, AC240
DC6, DC12, DC24, DC48,
DC100, DC110
DC6, DC12, DC24, DC48,
DC100, DC110
RH4B-LD∗
RH4V2-U∗
★
RH4V2-UL∗
★
RH4V2-UD∗ ★
AC6, AC12, AC24, AC50,
AC100, AC110, AC115,
AC120, AC200, AC220,
AC230, AC240
DC6, DC12, DC24, DC48,
DC100, DC110
DC6, DC12, DC24, DC48,
DC100, DC110
Type numbers marked with ★ in the table above are UL-recognized, CSA-certified, and TÜV-approved.
Ordering Information
When ordering, specify the Type No. and coil voltage code.
(Example) RH3B-U
AC110
Type No.
Coil Voltage Code
Coil Ratings
Rated Voltage (V)
AC (50/60Hz)
SPDT
DPDT
50Hz
60Hz
SPDT
DPDT
3PDT
4PDT
SPDT
DPDT
3PDT
4PDT
SPDT
DPDT
3PDT
4PDT
6
6
6
6
170
240
330
387
150
200
280
330
18.8
9.4
6.4
5.4
12
12
12
86
121
165
196
75
100
140
165
76.8
39.3
25.3
21.2
24
24
24
24
42
60.5
81
98
37
50
70
83
300
153
103
84.5
50
50
50
50
20.5
28.9
39.5
47
18
24
34
40
1,280
680
460
340
100
100-110
100
100
10.5
10.3-11.8
20
23.5
9
9.1-10.0
17
20
5,220
3,360
1,940
1,560
110
—
110
110
9.6
—
18.1
21.6
8.4
—
15.5
18.2
6,950
—
2,200
1,800
115
110-120
115
115
8.9
9.4-10.8
17.1
20.8
7.8
8.0-9.2
14.8
17.5
7,210
4,290
2,620
1,910
120
—
120
120
8.6
—
16.4
19.5
7.5
—
14.2
16.5
8,100
—
2,770
2,220
200
200-220
200
200
5.6
5.1-5.9
9.8
11.8
4.9
4.3-5.0
8.5
10
21,442
13,690
8,140
6,360
220
—
220
220
4.7
—
8.8
10.7
4.1
—
7.7
9.1
25,892
—
10,800
7,360
230
220-240
230
230
4.7
4.7-5.4
8.5
10.3
4.1
4.0-4.6
7.4
8.7
26,710
18,820
11,500
8,520
240
240
4.9
—
8.2
9.8
4.3
—
7.1
8.3
26,710
—
12,100
9,120
SPDT
DPDT
3PDT
4PDT
240
—
DPDT
DC
3PDT 4PDT
Operation Characteristics
(against rated values at 20°C)
Coil Resistance (Ω)
±10% at 20°C
12
SPDT
20
Rated Current (mA) ±15% at 20°C
3PDT 4PDT
SPDT
DPDT
3PDT
4PDT
6
6
6
6
128
150
240
250
47
40
25
24
12
12
12
12
64
75
120
125
188
160
100
96
24
24
24
24
32
36.9
60
62
750
650
400
388
48
48
48
48
18
18.5
30
31
2,660
2,600
1,600
1,550
100
100-110
100
100
10
8.2-9.0
14.5
15
10,000
12,250
6,900
6,670
110
—
110
110
8
—
12.8
15
13,800
—
8,600
7,340
Max. Continuous Min. Pickup
Applied Voltage
Voltage
Dropout
Voltage
110%
80%
maximum
30%
minimum
110%
80%
maximum
10%
minimum
(04/10/25)
RH Series Power Relays
Contact Ratings
Type
Continuous
Current
SPDT
DPDT
3PDT
4PDT
• UL Ratings
Maximum Contact Capacity
Allowable Contact Power
Resistive
Load
Inductive
Load
1540VA AC
300W DC
10A
1650VA AC
300W DC
10A
Resistive
Rated Load
RH1
RH2
RH3
RH4
RH1
RH2
10A
7.5A
7.5A
7A
10A
10A
Voltage
(V)
Res.
Load
Ind.
Load
240V AC
110 AC
10A
7A
120V AC
220 AC
7A
4.5A
30V DC
10A
30 DC
10A
7A
110 AC
1100VA AC
220 AC
225W DC
30 DC
10A
7.5A
7.5A
5A
10A
7.5A
990VA AC
210W DC
General use
Voltage
10A
28V DC
10A
7A
RH3
6.5A
7.5A
Horse Power Rating
RH4
5A
RH1
RH2
1/3 HP 1/3 HP
7.5A 1/6 HP 1/6 HP
Resistive
Voltage
• TÜV Ratings
RH1
RH2
RH1
RH2
RH3
RH4
240V AC 10A
10A
RH4
RH3
7.5A
7A
7A
7A
10A
7.5A
7.5A
120V AC 10A
10A
10A
10A
10A
10A
10A
10A
30V DC
10A
10A
10A
240V AC
30V DC
10A
AC: cos ø = 1.0, DC: L/R = 0 ms
RH3
General use
RH2
10A
RH1
RH4
• CSA Ratings
Note: Inductive load for the rated load — cos ø = 0.3, L/R = 7 ms
Voltage
RH3
7.5A 7.5A
7A
7.5A
Horse
Power
Rating
RH4 RH1, 2, 3
5A
7.5A
1/3 HP
1/6 HP
Specifications
Contact Material
Silver cadmium oxide
Contact Resistance ∗1
50 mΩ maximum
Minimum Applicable Load
Operate Time ∗2
Release Time ∗2
Power Consumption
(approx.)
20 ms maximum
3PDT
4PDT
25 ms maximum
SPDT
DPDT
20 ms maximum
3PDT
4PDT
25 ms maximum
SPDT
AC: 1.1 VA (50 Hz), 1 VA (60 Hz)
DC: 0.8W
DPDT
AC: 1.4 VA (50 Hz), 1.2 VA (60 Hz)
DC: 0.9W
3PDT
AC: 2 VA (50 Hz), 1.7 VA (60 Hz)
DC: 1.5W
4PDT
AC: 2.5 VA (50 Hz), 2 VA (60 Hz)
DC: 1.5W
SPDT
Between live and dead parts:
Between contact and coil:
Between contacts of the same pole:
2000V AC, 1 minute
2000V AC, 1 minute
1000V AC, 1 minute
DPDT
3PDT
4PDT
Between live and dead parts:
Between contact and coil:
Between contacts of different poles:
Between contacts of the same pole:
2000V AC, 1 minute
2000V AC, 1 minute
2000V AC, 1 minute
1000V AC, 1 minute
100 MΩ minimum (500V DC megger)
Insulation Resistance
Dielectric Strength
24V DC, 30 mA; 5V DC, 100 mA (reference value)
SPDT
DPDT
Operating Frequency
Electrical:
Mechanical:
1800 operations/h maximum
18,000 operations/h maximum
Vibration Resistance
Damage limits:
Operating extremes:
10 to 55 Hz, amplitude 0.5 mm
10 to 55 Hz, amplitude 0.5 mm
Damage limits:
Operating extremes:
1000 m/s2
200 m/s2 (SPDT, DPDT)
100 m/s2 (3PDT, 4PDT)
Shock Resistance
Electrical Life
DPDT
500,000 operations minimum (110V AC, 1A)
SPDT
3PDT
4PDT
200,000 operations minimum (110V AC, 1A)
SPDT
–25 to +50°C (no freezing)
DPDT
3PDT
4PDT
–25 to +40°C (no freezing)
Mechanical Life
Operating
Temperature ∗4
∗3
50,000,000 operations minimum
Operating Humidity
45 to 85% RH (no condensation)
Weight (approx.)
SPDT: 24g, DPDT: 37g, 3PDT: 50g, 4PDT: 74g
Note: Above values are initial values.
∗1: Measured using 5V DC, 1A voltage drop method
∗2: Measured at the rated voltage (at 20°C), excluding contact bouncing
Release time of relays with diode: 40 ms maximum
∗3: Relays with indicator or diode: 1000V AC, 1 minute
∗4: For use under different temperature conditions, refer to Continuous Load Current vs. Operating Temperature Curve. The operating temperature range of
relays with indicator or doide is –25 to +40°C.
(04/10/25)
21
RH Series Power Relays
Internal Connection (Bottom View)
• Basic Type
SPDT
DPDT
1
1
5
9
13
(–)
3PDT
4
1
5
8
5
9
12
9
13( – )
14
(+)
( + )14
• With Check Button
4PDT
4
1
6
8
5
6
7
8
10
12
9
10
11
12
2
13 ( – )
2
3
Contacts can be operated by pressing the check button. Press the button quickly to prevent arcing.
( + )14
13( – )
( + )14
Front
Pushbutton
4
• With Indicator (-L type)
SPDT
Below
100V
AC/DC
3PDT
1
1
5
5
9
9
13
(–)
14
(+)
2
13
(–)
DPDT
4
1
6
8
5
6
7
8
10
12
9
10
11
12
13 ( – )
( + )14
2
3
1
4
13( – )
4
5
8
9
12
13( – )
( + )14
∗
1
1
2
4
1
2
3
4
5
5
6
8
5
6
7
8
9
9
10
12
9
10
11
12
14
(+)
Below
24V
AC/DC
( + )14
∗
∗
100V
AC/DC
and over
4PDT
13( – )
( + )14
13( – )
1
( + )14
4
5
8
9
12
13( – )
( + )14
24V
AC/DC
and over
When the coil is energized, the indicator
goes on.
∗ Relays for below
100V DC do not contain
a protection diode
(except DPDT).
• With Diode (-D type)
SPDT
DPDT
3PDT
4PDT
1
1
4
1
2
4
1
2
3
5
5
8
5
6
8
5
6
7
8
9
9
12
9
10
12
9
10
11
12
( + )14
13( – )
13
(–)
14
(+)
13( – )
( + )14
13 ( – )
4
( + )14
This type contains a diode to
absorb the counter emf generated
when the coil is deenergized. The
release time is slightly longer.
Available for DC coil only.
• Diode Characteristics
Reverse withstand voltage: 1,000V
Forward current: 1A
• With Indicator and Diode (-LD type)
DPDT
Below
24V DC
24V DC
and over
3PDT
1
4
1
2
4
1
2
3
5
8
5
6
8
5
6
7
8
9
12
9
10
12
9
10
11
12
13( – )
( + )14
1
4
1
2
4
1
2
3
5
8
5
6
8
5
6
7
8
9
10
12
9
10
11
12
9
13( – )
12
( + )14
Below
100V DC
100V DC
and over
13( – )
( + )14
13( – )
• With Resistor and Capacitor (-R type)
DPDT
1
4
5
8
9
12
13(–)
22
4PDT
(+)14
This type contains an RC circuit to absorb
the surge voltage generated when the coil is
deenergized. This type is approx. 17 mm
higher than the basic type.
Available for AC coils of 100V and over.
R: 120Ω
C: 0.033 µF
( + )14
13( – )
13( – )
( + )14
4
This type contains an operation
indicator and a sure absorber,
and has the same height as the
basic type.
4
( + )14
• With Indicator and RC (-LR type)
DPDT
1
4
5
8
9
12
13(–)
This type contains an operation indicator and
a surge absorber. This type is approx. 17 mm
higher than the basic type.
Available for AC coils of 100V and over.
(+)14
(04/10/25)
RH Series Power Relays
Characteristics (Reference Data)
• Maximum Switching Capacity
(RH1)
(RH2/RH3/RH4)
10.0
10.0
AC resistive
AC resistive
5.0
AC inductive
Load Current (A)
Load Current (A)
5.0
DC resistive
1.0
DC inductive
0.5
0.1
1
5
10
AC inductive
DC resistive
1.0
DC inductive
0.5
50
100
0.1
1
200 300
5
10
50
Load Voltage (V)
Load Voltage (V)
100
200 300
• Electrical Life Curve
AC Load
DC Load
1000
110V AC resistive
(RH1)
1000
(RH1)
500
Life (× 10,000 operations)
Life (× 10,000 operations)
500
100
50
30V DC resistive
100
50
100V DC resistive
30V DC inductive
20
10
220V AC inductive
1
2
(RH2) 1000
3
20
220V AC resistive
110V AC inductive
4
5
6
7
Load Current (A)
8
9
100V DC inductive
10
10
1
2
3
4
5
6
Load Current (A)
7
8
9
10
7
8
9
10
7
8
9
10
(RH2) 1000
110V AC resistive
30V DC resistive
500
Life (× 10,000 operations)
Life (× 10,000 operations)
500
100
50
50
220V AC resistive
110V AC inductive
220V AC inductive
100V DC resistive
1
2
3
4
5
6
7
Load Current (A)
8
9
100V DC inductive
10
10
(RH3/RH4) 1000
1
110V AC resistive
Life (× 10,000 operations)
Life (× 10,000 operations)
4
5
6
Load Current (A)
50
30V DC inductive
100
50
20
220V AC inductive
220V AC resistive
110V AC inductive
(04/10/25)
3
30V DC resistive
500
100
10
2
(RH3/RH4) 1000
500
20
30V DC
inductive
20
20
10
100
1
2
3
4
5
6
Load Current (A)
7
8
9
10
100V DC resistive
100V DC inductive
10
1
2
3
4
5
6
Load Current (A)
23
RH Series Power Relays
• Continuous Load Current vs. Operating Temperature Curve (Basic Type, With Check Button, and Top Bracket Mounting Type)
Note: The rated voltage is
applied to the coil.
(RH1)
100
90
100
90
60
AC Coil
50
40
30
20
10
Operating Temperature (°C)
DC Coil
70
80
DC Coil
70
60
50
AC Coil
40
30
20
0
80
70
60
50
AC/DC Coil
40
30
20
10
10
1 2 3 4 5 6 7 8 9 10
Load Current (A)
Note: The rated voltage is
applied to the coil.
(RH3/RH4)
90
80
0
Note: The rated voltage is
applied to the coil.
(RH2)
Operating Temperature (°C)
Operating Temperature (°C)
100
0
1 2 3 4 5 6 7 8 9 10
Load Current (A)
1 2 3 4 5 6 7 8 9 10
Load Current (A)
Dimensions
RH1B-U/RH1B-UL/RH1B-UD
Total length from panel surface including relay socket
SH1B-05A: 61.5 (63.5) max., SH1B-51: 39.6 (41.6) max.
4.7
Dimensions in the ( )
include a hold-down spring.
ø2.6 hole
1
0.5
(Photo: RH1B-U)
27.5
5
9
13 14
5.4
35.6 max.
• Applicable Socket and Hold-down Spring
Socket
Mounting Style
Type No.
DIN Rail Mount
Socket
SH1B-05A
SH1B-05C
Panel Mount
Socket
SH1B-51
PC Board Mount
Socket
SH1B-62
Hold-down
Spring
SY2S-02F1
SFA-101
SFA-202
SY4S-51F1
SFA-301
SFA-302
14
6.4
PRODUCT SERVICE
RH2B-U/RH2B-UL/RH2B-UD/RH2B-ULD
Total length from panel surface including relay socket
SH2B-05A: 61.5 (63.5) max., SH2B-51: 39.6 (41.6) max.
Dimensions in the ( )
include a hold-down spring.
(Photo: RH2B-U)
5
8
9
12
13
14
6.4
21
PRODUCT SERVICE
Total length from panel surface including relay socket
SH3B-05A: 61.5 (63.5) max., SH3B-51: 39.6 (41.6) max.
0.5
(Photo: RH3B-U)
1
2
4
5
6
8
9
10
11
SY4S-02F1
SFA-101
SFA-202
SH2B-05D
SFA-502
Panel Mount
Socket
SH2B-51
SY4S-51F1
(SY4S-02F1)
SFA-301
SFA-302
PC Board Mount
Socket
SH2B-62
SY4S-51F1
(SY4S-02F1)
35.6 max.
RH4B-U/RH4B-UL/RH4B-UD/RH4B-LD
6.4
4.7
Dimensions in the ( )
include a hold-down spring.
0.5
1
2
3
4
5
6
7
8
9
10
11
13
6.4
12
14
27.5
ø2.6 hole
35.6 max.
Socket
Mounting Style
Type No.
DIN Rail Mount
Socket
SH3B-05A
SH3B-05C
Panel Mount
Socket
SH3B-51
PC Board Mount
Socket
SH3B-62
Hold-down
Spring
SH3B-05F1
SFA-101
SFA-202
SY4S-51F1
(SH3B-05F1)
SFA-301
SFA-302
31
Total length from panel surface including relay socket
SH4B-05A: 61.5 (63.5) max., SH4B-51: 39.6 (41.6) max.
(Photo: RH4B-U)
• Applicable Socket and Hold-down Spring
Note: (SH3B-05F1) is for the relay with check button.
14
13
PRODUCT SERVICE
27.5
ø2.6 hole
4.7
Dimensions in the ( )
include a hold-down spring.
24
Hold-down
Spring
Note: (SY4S-02F1) is for the relay with check button.
RH3B-U/RH3B-UL/RH3B-D/RH3B-LD
PRODUCT SERVICE
SH2B-05A
SH2B-05C
4
27.5
0.5
1
35.6 max.
Socket
Mounting Style
Type No.
DIN Rail Mount
Socket
4.7
ø2.6 hole
• Applicable Socket and Hold-down Spring
• Applicable Socket and Hold-down Spring
Socket
Mounting Style
Type No.
DIN Rail Mount
Socket
SH4B-05A
SH4B-05C
Panel Mount
Socket
SH4B-51
PC Board Mount
Socket
SH4B-62
Hold-down
Spring
SH4B-02F1
SFA-101
SFA-202
SY4S-51F1
(SH4B-02F1)
SFA-301
SFA-302
Note 1: Use two SY4S-51F1 hold-down springs for the
SH4B-51 and SH4B-62 sockets.
Note 2: (SH4B-02F1) is for the relay with check button.
41
(04/10/25)
RH Series Power Relays
RH2B-R/RH2B-LR
• Applicable Socket and Hold-down Spring
Total length from panel surface including relay socket
SH2B-05A: 78.3 (80.3) max., SH2B-51: 56.4 (58.4) max.
Socket
Mounting Style
Type No.
DIN Rail Mount
SH2B-05A
Socket
SH2B-05C
Dimensions in the ( )
include a hold-down spring.
Panel Mount
Socket
4
5
8
9
12
13
14
SH2B-51
SFA-302
Note: Hold-down spring is not available for mounting
the RH2B-R on a PC board mount socket.
27.5
1
SFA-202
21
RH2B-UT
4.7
ø2.6 hole
0.5
0.5
ø2.6 hole
4.7
10
4.7
RH1B-UT
4.7
6.4
52.4 max.
(Photo: RH2B-R)
0.5
ø2.6 hole
Hold-down
Spring
1
2
35.6 max.
5.4
6.4
3.5
4.7
3.5
14.5
2
21.5
35.6 max.
4
5
8
9
12
13
14
7.25
6.6
13 14
27.5
43.2
38
9
5.9
1
27.5
43.2
38
5.9
5
6.4
PRODUCT SERVICE
PRODUCT SERVICE
RH4B-UT
4.7
2
ø2.6 hole
6
8
9
10
12
31.5
3.5
1
5.9
5
14
3
4
6
7
8
9
10
11
12
14
7.25
2
35.6 max.
2
5
13
7.25
13
21.5
4
44
38
2
28
43.2
38
5.9
1
28
ø2.6 hole
0.5
4.7
3.5
0.5
4.7
10
10
10
4.7
10 10
RH3B-UT
35.6 max.
6.4
28
41.5
42 max.
PRODUCT SERVICE
PRODUCT SERVICE
6.4
RH1V2-U/RH1V2-UD
3-ø2.4 holes
4.7
2
1.5
2-ø2 holes
7.15
0.5
1
4.6
12.5
6.6
9
0.5
35.6 max.
27.5
5
(Photo: RH1V2-U)
13
14
14
PRODUCT SERVICE
4.4
RH2V2-U/RH2V2-UL/
RH2V2-UD
8-ø2.4 holes
5
7.8
4
5
8
9
12
13
14
27.5
1
(Photo: RH2V2-U)
13.15
0.5
2
0.5
7.25
4.7
0.5
10
2
35.6 max.
PRODUCT SERVICE
21
4.6
14.2
(RH2V2-U)
RH3V2-U/RH3V2-UL/
RH3V2-D
11-ø2.4 holes
10
11
(RH3V2-U)
35.6 max.
RH4V2-U/RH4V2-UL/
RH4V2-UD
14
31
4.6
30
35.6 max.
4.7
13.15
4
7
8
10
11
12
14
7.25
6
9
27.5
0.5
3
5
13
0.5
(RH4V2-U)
2
10
7.8
2
14-ø2.4 holes
1
(Photo: RH4V2-U)
PRODUCT SERVICE
7.8
8
10
0.5
PRODUCT SERVICE
4
6
9
13
7.25
(Photo: RH3V2-U)
2
5
27.5
0.5
1
13.15
2
4.7
10
41
4.6
All dimensions in mm.
(04/10/25)
25
RM Series Miniature Relays
DPDT contacts (5A)
Plug-in and PC board terminal styles
• Compact miniature size saves space
• Options include indicators and check buttons.
PRODUCT SERVICE
Types
Plug-in Terminal
Type
Basic
RM2S-U∗
With Indicator
RM2S-UL∗
With Check Button
RM2S-UC∗
PC Board Terminal
Coil Voltage Code ∗
Type No.
★
AC6, AC12, AC24, AC50,
AC100-110, AC110-120,
★ AC200-220, AC220-240
DC6, DC12, DC24, DC48,
★ DC100-110
Top Bracket Mounting Type RM2S-UT∗
★
With Diode
(DC coil only)
RM2S-UD∗
★
With Indicator and Diode
(DC coil only)
RM2S-ULD∗ ★
DC6, DC12, DC24, DC48,
DC100-110
Coil Voltage Code ∗
Type No.
AC6, AC12, AC24, AC50,
★ AC100-110, AC110-120,
AC200-220, AC220-240
★ DC6, DC12, DC24, DC48,
DC100-110
RM2V-U∗
RM2V-UL∗
—
—
—
—
—
—
—
—
Type numbers marked with ★ in the table above are UL-recognized, CSA-certified, and TÜV-approved.
Ordering Information
When ordering, specify the Type No. and coil voltage code.
(Example) RM2S-U
AC100-110
Type No.
Coil Voltage Code
Coil Ratings
Rated Current (mA) ±15% at 20°C
DC
AC (50/60Hz)
Rated Voltage (V)
26
50Hz
60Hz
Coil Resistance (Ω)
±10% at 20°C
6
240
200
9.4
12
121
100
39.3
24
60.5
50
153
50
28.9
24
680
100-110
10.3-11.8
9.1-10.0
3,360
110-120
9.4-10.8
8.2-9.2
4,290
200-220
5.1-5.9
4.3-5.0
13,690
220-240
4.7-5.4
4.0-4.6
18,820
6
150
40
12
75
160
24
36.9
650
48
18.5
2,600
100-110
8.2-9.0
12,250
Operation Characteristics
(against rated values at 20°C)
Max. Continuous
Applied Voltage
Min. Pickup Voltage
Dropout Voltage
110%
80%
maximum
30%
minimum
110%
80%
maximum
10%
minimum
(04/10/25)
RM Series Miniature Relays
Contact Ratings
Continuous
Current
Resistive
Load
1100VA AC
150W DC
5A
Specifications
Contact Material
Contact Resistance
Minimum Applicable
Load
Operate Time
Release Time
Power Consumption
(approx.)
Insulation Resistance
Maximum Contact Capacity
Allowable Contact Power
Rated Load
Inductive
Load
440VA AC
75W DC
Voltage
Res.
Load
Ind.
Load
110V AC
5A
2.5A
220V AC
5A
2A
30V DC
5A
2.5A
Note: Inductive load for the rated load — cos ø = 0.3, L/R = 7 ms
Silver
30 mΩ maximum
20 ms maximum
∗2
20 ms maximum
∗2
AC: 1.4 VA (50 Hz), 1.2 VA (60 Hz)
DC: 0.9W
100 MΩ minimum (500V DC megger)
Between live and dead parts:
2000V AC, 1 minute
∗3
Between contact and coil: 2000V AC, 1 minute
Between contacts of different poles:
2000V AC, 1 minute
Between contacts of the same pole:
1000V AC, 1 minute
Electrical:
1800 operations/h maximum
Mechanical: 18,000 operations/h maximum
Coil: 85°C maximum, Contact: 65°C maximum
Damage limits: 10 to 55 Hz, amplitude 0.5 mm
Operating extremes:
10 to 55 Hz, amplitude 0.5 mm
Damage limits:
1000 m/s2
Operating extremes: 200 m/s2
500,000 operations (220V AC, 5A)
50,000,000 operations
–25 to +45°C (no freezing)
∗4
45 to 85% RH (no condensation)
35g
• UL Ratings
Voltage
Resistive
240V AC
5A
2A
120V AC
—
2.5A
100V DC
0.4A
—
30V DC
5A
—
General use
Voltage
Resistive
General use
240V AC
5A
2A
2.5A
Dielectric Strength
Operating Frequency
• CSA Ratings
Temperature Rise
Vibration Resistance
120V AC
5A
100V DC
—
0.4A
30V DC
5A
2.5A
Shock Resistance
Electrical Life
Mechanical Life
Operating Temperature
Operating Humidity
Weight (approx.)
• TÜV Ratings
240V AC
5A
30V DC
5A
AC: cos ø = 1.0, DC: L/R = 0 ms
∗1
24V DC, 10 mA; 5V DC, 20 mA (reference value)
Note: Above values are initial values.
∗1: Measured using 5V DC, 1A voltage drop method
∗2: Measured at the rated voltage (at 20°C), excluding contact bouncing
Release time of relays with diode: 40 ms maximum
∗3: Relays with indicator or diode: 1000V AC, 1 minute
∗4: For use under different temperature conditions, refer to Continuous Load
Current vs. Operating Temperature Curve. The operating temperature
range of relays with indicator or doide is –25 to +40°C.
Characteristics (Reference Data)
• Maximum Switching Capacity
• Electrical Life Curve
AC Load
5
DC Load
110V AC resistive
30V DC resistive
1
DC
resistive
DC inductive
0.5
Life (× 10,000 operations)
220V AC resistive
AC
inductive
Life ( × 10,000 operations)
Load Current (A)
AC resistive
1000
500
100
50
30V DC inductive
1000
500
100
50
100V DC resistive
110V AC inductive
0.1
1
5
10
50
100
200 300
100V DC inductive
220V AC inductive
Load Voltage (V)
10
0
1
2
3
4
Load Current (A)
5
10
0
1
2
3
4
5
Load Current (A)
• Continuous Load Current vs. Operating Temperature Curve
(Basic Type, With Check Button, and Top Bracket Mounting Type)
Note: The rated voltage is
applied to the coil.
100
Operating Temperature (°C)
90
80
70
DC Coil
60
50
AC Coil
40
30
20
10
0
1
2
3
4
5
Load Current (A)
(04/10/25)
27
RM Series Miniature Relays
Internal Connection (Bottom View)
• Basic Type
1
4
5
8
9
12
13(–)
(+)14
Front
Pushbutton
Below 24V AC/DC
1
4
5
8
1
Contacts can be operated by pressing the check button. Press the button quickly to prevent arcing.
• With Indicator (-L type)
9
• With Diode (-D type)
• With Check Button
24V AC/DC and over
12
1
4
5
8
9
12
5
8
9
12
13(–)
• Diode Characteristics
Reverse withstand voltage: 1,000V
Forward current: 1A
(+)14
• With Indicator and Diode (-LD type)
When the coil is energized,
the indicator goes on.
Below 24V DC
∗ The LED protection diode
is not contained in DPDT relays for below 100V DC.
(+)14
13(–)
This type contains a diode to absorb the counter emf
generated when the coil is deenergized. The release
time is slightly longer.
4
24V DC and over
1
4
1
4
5
8
5
8
9
12
9
12
13(–)
14(+)
13(–)
∗
13(–)
∗
This type contains an operation indicator and a surge absorber, and has the same
height as the basic type.
(+)14
(+)14
Dimensions
• Plug-in Type (Solder Terminal)
• Applicable Socket and Hold-down Spring
RM2S-U/RM2S-UL
RM2S-UD/RM2S-ULD
Total length from the panel surface including relay socket.
SM2S-05A: 61.5 (63.5) max., SM2S-51: 39.6 (41.6) max.
Socket
Mounting Style
Type No.
Dimensions in the ( )
include a hold-down spring.
2.6
DIN Rail Mount
Socket
1
4
5
8
9
12
13
14
Panel Mount
Socket
27.5
0.5
2.2 × ø1.2 hole
(Photo: RM2S-U)
35.6 max.
6.4
PC Board Mount
Socket
21
Hold-down
Spring
SM2S-05A
SM2S-05C
SY4S-02F1
SFA-101
SFA-202
SM2S-05D
SFA-502
SM2S-51
SM2S-61
SM2S-62
SY4S-51F1
(SY4S-02F1)
SFA-301
SFA-302
SY4S-51F1
(SY4S-02F1)
PRODUCT SERVICE
Note: (SY4S-02F1) is for the relay with check button.
• PC Board Terminal Type
0.8
RM2V-U/RM2V-UL
2.6
0.5
4.1
8-ø1 hole
4
13
14
21
12.7
12
6.4
8
9
7.15
0.5
35.6 max.
4
5
27.5
1
(Photo: RM2V-U)
13.2
PRODUCT SERVICE
• Top Bracket Mounting Type (Solder Terminal)
2.6
13.2
RM2S-UT
4.1
6.3
4
5
8
9
12
13
14
6.4
38
43.2
1
27.5
0.5
2.2 × ø1.2 hole
3.5
2
21.5
PRODUCT SERVICE
28
35.6 max.
6.4
All dimensions in mm.
(04/10/25)
RY Series Miniature Relays
DPDT (3A) and 4PDT (5A) contacts
Bifurcated contacts are also available
The RY series are general purpose miniature relays with a
3A or 5A contact capacity. A wide variety of terminals styles
and coil voltages meet a wide range of applications.
All 4PDT types have arc barriers.
PRODUCT SERVICE
Types
• Plug-in Terminal Type
Contact
Type
4PDT
Coil Voltage Code ∗
Basic
RY2S-U∗
With Indicator
Top Bracket Mounting
RY2S-UL∗ ★ AC6, AC12, AC24, AC50, AC100,
AC110, AC115, AC120, AC200,
—
AC220, AC230, AC240
DC6, DC12, D24, DC48, DC100,
—
DC110
RY2S-UT∗ ★
With Diode
(DC coil only)
RY2S-UD∗ ★
With Check Button
With Indicator and
Check Button
Standard
DPDT
Type No.
With Indicator and
Diode
(DC coil only)
Basic
With Indicator
Bifurcated Top Bracket Mounting
With Diode
(DC coil only)
★
RY4S-U∗
DC6, DC12, DC24, DC48,
DC100, DC110
—
★
RY4S-UL∗ ★ AC6, AC12, AC24, AC50,
AC100-110, AC110-120,
RY4S-UC∗ ★
AC200-220, AC220-240
RY4S-ULC∗ ★ DC6, DC12, DC24, DC48,
DC100-110
RY4S-UT∗ ★
RY4S-UD∗ ★
RY4S-ULD∗ ★
—
RY22S-U∗ ★ AC6, AC12, AC24, AC50, AC100,
RY22S-UL∗ ★ AC110, AC115, AC120, AC200,
AC220, AC230, AC240
RY22S-UT∗ ★ DC6, DC12, DC24, DC48,
DC100, DC110
RY22S-UD∗ ★
Coil Voltage Code ∗
Type No.
DC6, DC12, DC24, DC48,
DC100, DC110
DC6, DC12, DC24, DC48,
DC100-110
—
—
—
—
—
—
• PC Board Terminal Type
Contact
Standard
Type
DPDT
Coil Voltage Code ∗
Type No.
RY2V-U∗
With Indicator
RY2V-UL∗
With Diode
(DC coil only)
RY2V-UD∗ ★
Standard
RY22V-U∗
With Diode
(DC coil only)
DC6, DC12, DC24, DC48,
DC100, DC110
AC6, AC12, AC24, AC50, AC100,
AC110, AC115, AC120, AC200,
AC220, AC230, AC240
RY22V-UL∗ ★ DC6, DC12, DC24, DC48,
DC100, DC110
★
RY22V-UD∗ ★
Type numbers marked with ★ in the tables above are
UL-recognized, CSA-certified, and TÜV-approved.
DC6, DC12, DC24, DC48,
DC100, DC110
Coil Voltage Code ∗
Type No.
AC6, AC12, AC24, AC50, AC100,
RY4V-U∗
★
AC110, AC115, AC120, AC200,
AC220, AC230, AC240
★ DC6, DC12, DC24, DC48,
RY4V-UL∗
DC100, DC110
Standard
Bifurcated With Indicator
4PDT
AC6, AC12, AC24, AC50,
★
AC100-110, AC110-120,
AC200-220, AC220-240
★ DC6, DC12, DC24, DC48,
DC100-110
—
—
—
—
—
—
—
Ordering Information
When ordering, specify the Type No. and coil voltage code.
(Example) RY4S-U
Type No.
(04/10/25)
AC100-110
Coil Voltage Code
29
RY Series Miniature Relays
Coil Ratings
DC
AC (50/60Hz)
DPDT
Coil Resistance (Ω)
±10% at 20°C
Rated Current (mA) ±15% at 20°C
Rated Voltage (V)
50Hz
4PDT
DPDT
60Hz
4PDT
DPDT
4PDT
DPDT
Operation Characteristics (against rated values at 20°C)
4PDT
6
6
170
240
150
200
18.8
9.4
12
12
86
121
75
100
76.8
39.3
24
24
42
60.5
37
50
300
153
50
50
20.5
28.9
18
24
1,280
680
100
100-110
10.5
10.3-11.8
9
9.1-10.0
5,220
3,360
110
—
9.6
—
8.4
—
6,950
—
115
110-120
8.9
9.4-10.8
7.8
8.0-9.2
7,210
4,290
120
—
8.6
—
7.5
—
8,100
—
200
200-220
5.6
5.1-5.9
4.9
4.3-5.0
21,442
13,690
220
—
4.7
—
4.1
—
25,892
—
230
220-240
4.7
4.7-5.4
4.1
4.0-4.6
26,710
18,820
240
—
4.9
—
4.3
—
26,710
—
DPDT
4PDT
DPDT
4PDT
DPDT
4PDT
6
6
128
150
47
40
12
12
64
75
188
160
24
24
32
36.9
750
650
48
48
18
18.5
2,660
2,600
100
100-110
10
8.2-9.0
10,000
12,250
110
—
8
—
13,800
—
Maximum Contact Capacity
Allowable Contact Power
Rated Load
Max. Continuous
Applied Voltage
Min. Pickup Voltage
Dropout Voltage
110%
80%
maximum
30%
minimum
110%
80%
maximum
10%
minimum
Contact Ratings
Contact
Continuous
Current
Standard
Contact
DPDT
3A
Standard
Contact
4PDT
5A
Bifurcated
Contact
DPDT
Resistive
Load
Inductive
Load
660 VA AC
90W DC
176 VA AC
45W DC
1200 VA AC
150W DC
288 VA AC
60W DC
176 VA AC
30W DC
1A
88 VA AC
15W DC
Voltage
Resistive
Load
Inductive
Load
110V AC
3A
1.5A
220V AC
3A
0.8A
30V DC
3A
1.5A
240V AC
5A
1.2A
30V DC
5A
2A
110V AC
1A
0.5A
220V AC
0.8A
0.4A
30V DC
1A
0.5A
Note: Inductive load for the rated load — cos ø = 0.3, L/R = 7 ms
• UL Ratings (Standard Contact)
Voltage
240V AC
Resistive
• CSA Ratings (Standard Contact)
General use
DPDT
4PDT
DPDT
4PDT
3A
5A
0.8A
5A
Resistive
General use
Voltage
DPDT
DPDT
4PDT
DPDT
4PDT
240V AC
3A
5A
240V AC
3A
5A
0.8A
5A
30V DC
3A
5A
Voltage
120V AC
—
—
1.5A
—
120V AC
3A
—
1.5A
—
100V DC
0.2A
0.2A
0.2A
0.2A
100V DC
—
—
0.2A
0.2A
30V DC
3A
5A
3A
5A
30V DC
3A
5A
1.5A
1.5A
• UL Ratings (Bifurcated Contact)
4PDT
AC: cos ø = 1.0, DC: L/R = 0 msec
• CSA Ratings (Bifurcated Contact)
Voltage
Resistive
General use
Voltage
Resistive
240V AC
0.8A
0.4A
240V AC
0.8A
0.4A
120V AC
1A
0.5A
120V AC
1A
0.5A
30V DC
1A
0.5A
30V DC
1A
—
30
• TÜV Ratings (Standard Contact)
General use
(04/10/25)
RY Series Miniature Relays
Specifications
Standard Contact
Contact Type
Bifurcated Contact
DPDT
Contact Material
∗1
Contact Resistance
Minimum Applicable Load
Silver-paradium alloy
50 mΩ maximum
100 mΩ minimum
24V DC, 5 mA; 5V DC, 10 mA (reference value)
1V DC, 100 µA (reference value)
∗2
20 ms maximum
Release Time
∗2
20 ms maximum
AC: 1.1 VA (50 Hz), 1 VA (60 Hz)
DC: 0.8W
AC: 1.4 VA (50 Hz), 1.2 VA (60 Hz)
DC: 0.9W
AC: 1.1 VA (50 Hz), 1 VA (60 Hz)
DC: 0.8W
Between live and dead parts:
2000V AC, 1 minute
Between contact and coil:
2000V AC, 1 minute
Between contacts of different poles:
2000V AC, 1 minute
Between contacts of the same pole:
1000V AC, 1 minute
Between live and dead parts:
1500V AC, 1 minute
∗3
Between contact and coil:
1500V AC, 1 minute
Between contacts of different poles:
1500V AC, 1 minute
Between contacts of the same pole:
1000V AC, 1 minute
Insulation Resistance
100 MΩ minimum (500V DC megger)
Dielectric Strength
Between live and dead parts:
1500V AC, 1 minute
∗3
Between contact and coil:
1500V AC, 1 minute
Between contacts of different poles:
1500V AC, 1 minute
Between contacts of the same pole:
1000V AC, 1 minute
Operating Frequency
Electrical:
Mechanical:
1800 operations/h maximum
18,000 operations/h maximum
Vibration Resistance
Damage limits:
Operating extremes:
10 to 55 Hz, amplitude 0.5 mm
10 to 55 Hz, amplitude 0.5 mm
Shock Resistance
Damage limits:
Operating extremes:
1000 m/s2
100 m/s2 (DPDT), 200 m/s2 (4PDT)
Electrical Life
200,000 operations (220V AC, 3A)
Mechanical Life
DPDT
Gold-plated silver
Operate Time
Power Consumption
(approx.)
4PDT
100,000 operations (220V AC, 5A)
200,000 operations (220V AC, 3A)
200,000 operations (110V AC, 1A)
50,000,000 operations
∗4
Operating Temperature
–25 to +55°C (no freezing)
–25 to +55°C (no freezing)
Operating Humidity
45 to 85% RH (no condensation)
Weight (approx.)
23g
∗5
–25 to +55°C (no freezing)
34g
23g
Note: Above values are initial values.
∗1: Measured using 5V DC, 1A voltage drop method
∗2: Measured at the rated voltage (at 20°C), excluding contact bouncing
Release time of relays with diode: 40 ms maximum
∗3: Relays with indicator or diode: 1000V AC, 1 minute
∗4: For use under different temperature conditions, refer to Continuous Load
Current vs. Operating Temperature Curve.
The operating temperature range of relays with indicator or diode is –25
to +40°C.
∗5: When the total current of 4 contacts is less than 15A, the operating temperature range is –25 to +70°C.
Characteristics (Reference Data)
• Maximum Switching Capacity
(RY22)
(RY2)
(RY4)
AC resistive
1
AC inductive
5
AC
inductive
1
DC resistive
DC inductive
0.5
3
Load Current (A)
AC resistive
Load Current (A)
0.5
3
Load Current (A)
AC
resistive
5
2
DC resistive
1
0.5
DC inductive
AC
inductive
DC resistive
DC inductive
0.1
0.05
0.3
0.2
0.1
1
5
50
10
100
200 300
1
10
Load Voltage (V)
20 30
50
100
Load Voltage (V)
200 300
0.01
1
5
10
50
100
200 300
Load Voltage (V)
• Continuous Load Current vs. Operating Temperature Curve
(Basic Type, With Check Button, and Top Bracket Mounting Type)
(RY2)
Note: The rated voltage is
applied to the coil.
100
(RY4)
100
DC Coil
70
60
AC Coil
50
40
30
20
10
1
2
3
Load Current (A)
(04/10/25)
Operating Temperature (°C)
Operating Temperature (°C)
80
0
Note: The rated voltage is
applied to the coil.
90
90
80
DC Coil
70
60
50
AC Coil
40
30
20
10
0
1
2
3
Load Current (A)
31
RY Series Miniature Relays
• Electrical Life Curve
(RY22)
AC Load
(RY4)
Life (× 10,000 operations)
1000
110V AC resistive
500
220V AC resistive
200
100
50
1000
1000
Life (× 10,000 operations)
Life ( × 10,000 operations)
(RY2)
500
240V AC resistive
200
100
240V AC inductive
50
500
110V AC resistive
220V AC resistive
100
110V AC inductive
220V AC inductive
10
0
1
2
20
10
0
3
220V AC inductive
50
20
20
110V AC inductive
1
2
3
4
10
5
1
Load Current (A)
Load Current (A)
Load Current (A)
(RY22)
DC Load
(RY2)
(RY4)
1000
30V DC resistive
200
100
50
20
100V DC resistive
100V DC inductive
10
0
5
Life (× 10,000 operations)
500
500
200
30V DC resistive
100
30V DC inductive
50
30V DC inductive
100
100V DC resistive
100V DC inductive
10
0
3
50
20
20
10
2
30V DC resistive
500
1000
30V DC inductive
Life (× 10,000 operations)
Life (× 10,000 operations)
1000
1
2
3
4
1
5
Load Current (A)
Load Current (A)
Load Current (A)
Internal Connection (Bottom View)
• Basic Type
• With Check Button
DPDT
4PDT
Front
Pushbutton
1
4
1
2
3
4
5
8
5
6
7
8
9
12
9
10
11
12
13 ( – )
13 ( – )
( + )14
Contacts can be operated by pressing the check button. Press the button quickly to prevent arcing.
( + )14
• With Indicator and Diode (-LD type)
This type contains an operation indicator and a surge
absorber, and has the same height as the basic type.
4PDT
Below
24V DC
DPDT
4
5
8
9
12
Below
24V
AC/DC
(+)14
When the relay is energized,
the indicator goes on.
1
2
3
4
5
6
7
8
9
10
11
12
13(–)
(+)14
∗ The LED protection diode is
not contained in DPDT relays
for below 100V DC.
1
4
5
8
9
12
13(–)
7
8
9
10
11
12
24V DC
and
over
4
(+)14
1
2
3
5
6
7
8
9
10
11
12
13(–)
∗
100V
AC/DC
and
over
3
6
4PDT
1
13(–)
2
5
13(–)
• With Indicator (-L type)
Below
100V
AC/DC
1
(+)14
24V
AC/DC
and
over
1
2
3
5
6
7
8
9
10
11
12
13(–)
4
(+)14
4
(+)14
• With Diode (-D type)
DPDT
1
4PDT
4
1
2
3
4
5
8
5
6
7
8
9
12
9
10
11
12
13(–)
32
(+)14
13(–)
(+)14
This type contains a diode to absorb the counter
emf generated when the coil is deenergized.
The release time is slightly longer.
• Diode Characteristics
Reverse withstand voltage: 1,000V
Forward current: 1A
(04/10/25)
RY Series Miniature Relays
Dimensions
• Plug-in Terminal Type
RY2S-U/RY2S-UL
RY2S-UD
RY22S-U/RY22S-UL
RY22S-UD
• Applicable Socket and Hold-down Spring
Total length from panel surface including relay socket
SY2S-05A: 61.5 (63.5) max., SY2S-51: 39.6 (41.6) max.
Socket
Mounting Style
Type No.
Dimensions in the ( )
include a hold-down spring.
2.6
3 × ø1.2 oblong hole
(Photo: RY2S-U)
4
5
8
9
12
13
14
27.5
0.5
1
(Photo: RY22S-U)
35.6 max.
5.4
14
DIN Rail Mount
Socket
SY2S-05A
SY2S-05C
Panel Mount
Socket
SY2S-51
PC Board Mount
Socket
SY2S-61
Hold-down
Spring
SY2S-02F1
SFA-101
SFA-202
SY4S-51F1
SFA-301
SFA-302
PRODUCT SERVICE
PRODUCT SERVICE
• Applicable Socket and Hold-down Spring
RY4S-U/RY4S-UL/RY4S-UD/RY4S-ULD
Socket
Mounting Style
Type No.
Total length from the panel surface including relay socket
SY4S-05A: 61.5 (63.5) max., SY4S-51: 39.6 (41.6) max.
2.2 × ø1.2 oblong hole
Dimensions in the ( )
include a hold-down spring.
2.6
SY4S-05D
(Photo: RY4S-U)
2
3
5
6
7
8
9
10
11
12
13
6.4
Panel Mount
Socket
4
SFA-502
SY4S-51F1
(SY4S-02F1)
SFA-301
SFA-302
SY4S-51
27.5
0.5
1
35.6 max.
SY4S-02F1
SFA-101
SFA-202
SY4S-05A
SY4S-05C
DIN Rail Mount
Socket
PRODUCT SERVICE
Hold-down
Spring
SY4S-61
14
PC Board Mount
Socket
SY4S-51F1
(SY4S-02F1)
Note: (SY4S-02F1) is for the relay with check button.
21
SY4S-62
0.5
12
7.15
8
9
6.4
(Photo: RY2V-U)
4
5
27.5
0.5
1
13 14
(Photo: RY22V-U)
35.6 max.
4
4.1
8-ø1 holes
14
12.7
RY22V-U/RY22V-UL/RY22V-UD
0.8
RY2V-U/RY2V-UL/RY2V-UD
2.6
• PC Board Terminal Type
4.4
PRODUCT SERVICE
PRODUCT SERVICE
0.5
0.8
RY4V-U/RY4V-UL
6.6
4.1
2.6
14-ø1 holes
4
13
14
8
12.7
7
10 11 12
7.15
3
6
9
6.4
0.5
2
5
27.5
1
(Photo: RY4V-U)
PRODUCT SERVICE
35.6 max.
4
4.4
21
4.4
4.4
• Top Bracket Mounting Type (Plug-in Terminal)
RY2S-UT
0.5
4.1
3 × ø1.2 oblong hole
2.6
4.4
RY22S-UT
6.3
38
43.2
5
8
9
12
27.5
4
1
6.4
13 14
3.5
2
14.5
35.6 max.
5.4
2.6
PRODUCT SERVICE
6.3
38
43.2
1
2
3
4
5
6
7
8
9
10
11
12
14
6.4
13
27.5
0.5
2.2 × ø1.2 oblong hole
4.1
4.4
4.4
RY4S-UT
4.4
PRODUCT SERVICE
PRODUCT SERVICE
3.5
2
21.5
35.6 max.
6.4
All dimensions in mm.
(04/10/25)
33
RR2KP Series Latch Relays
Self-maintained Latch Relays
DPDT — 10A contact capacity
The RR2KP series latch relays have a self-holding function
using permanent magnets in the magnetic circuit. Applying a
voltage on the set (or reset) coil operates the armature and
retains the contacts in that position until the opposite coil is
energized, hence the latch relays are ideal for memory and
flip-flop circuit applications.
• Enhanced self-holding functions, and vibration and shock
resistance.
• The self-holding mechanism is not subject to wear unlike
mechanical latch relays.
• Recognized by UL and certified by CSA.
Types
Terminal
Style
Pin
Terminal
Type
Coil Voltage Code ∗
Type No.
Basic
Ordering Information
When ordering, specify the Type No. and
coil voltage code.
AC6, AC12, AC24, AC50, AC100,
AC110, AC115, AC120, AC200,
AC220, AC230, AC240
DC6, DC12, DC24, DC48, DC110
RR2KP-U∗
With Check Button RR2KP-UC∗
(Example) RR2KP-U AC110
Type No.
Coil Voltage Code
Coil Ratings
Rated Current (mA) ±15% at 20°C
Rated Voltage (V)
DC
AC (50/60Hz)
50Hz
60Hz
Coil Resistance (Ω)
±10% at 20°C
6
467
429
3.5
12
200
184
23.8
24
100
92
95
50
48
44
400
100
24
22
1,600
110
23
21
1,900
115
23
21
2,200
120
24
22
2,200
200
12
11
6,400
220
10.9
10
7,740
230
11.1
10.2
9,190
240
11.5
10.6
9,190
6
240
25
12
120
100
24
60
400
48
30
1,600
110
13.8
7,960
Contact Ratings
Switching
Voltage
250V AC
125V DC
Continuous
Current
10A
Maximum Contact Capacity
Allowable Contact Power
Resistive
Load
Inductive
Load
1650 VA AC 1100 VA AC
300W DC
225W DC
Maximum Continuous
Applied Voltage
Set and Reset Voltage
110%
80%
maximum
110%
80%
maximum
• UL Ratings
Rated Load
Voltage
Resistive
General Use
Motor Load
Ind.
Load
10A
7A
1/3 HP
Voltage
Res.
Load
240V AC
120V AC
10A
7.5A
1/4 HP
110V AC
10A
7.5A
30V DC
10A
7A
—
220V AC
7.5A
5A
30V DC
10A
7.5A
100V DC
0.5A
0.3A
Note: Inductive load for rated load — cos ø - 0.3, L/R = 7 ms
34
Operation Characteristics
(against rated values at 20°C)
• CSA Ratings
Voltage
Resistive
General Use
Motor Load
240V AC
10A
7A
1/3 HP
120V AC
10A
7.5A
1/4 HP
100V DC
0.5A
—
30V DC
10A
7.5A
—
(04/10/25)
RR2KP Series Latch Relays
Dimensions
Contact Material
Contact Resistance
Operate Time
Power Consumption
(approx.)
Insulation Resistance
Silver
30 mΩ maximum (initial value)
25 ms maximum (at the rated voltage)
AC: 2.4 VA (50 Hz), 2.2 VA (60 Hz)
DC: 1.5W
100 MΩ minimum (500V DC megger)
Between live and dead parts:
1,500V AC, 1 minute
Between contact and coil:
1,500V AC, 1 minute
Between contacts of different poles:
1,500V AC, 1 minute
Between contacts of the same pole:
1,000V AC, 1 minute
Electrical:
1800 operations/h maximum
Mechanical:
18,000 operations/h maximum
Coil: 85°C maximum, Contact: 65°C maximum
0 to 60 m/s2 (maximum frequency: 55 Hz),
Frequency: 5 to 55 Hz, Amplitude: 0.5 mm
100 m/s2minimum
500,000 operations minimum (110V AC, 10A)
5,000,000 operations minimum
–5 to +40°C (no freezing)
45 to 85% RH (no condensation)
170g
Dielectric Strength
Operating Frequency
Temperature Rise
Vibration Resistance
Shock Resistance
Electrical Life
Mechanical Life
Operating Temperature
Operating Humidity
Weight (approx.)
Total length from panel surface including relay socket
SR3P-05A: 105 (108.5) max., SR3P-511: 87.5 (92) max.
6
5
7
4
8
3
9
2
10
1
80.5 max.
36
Specifications
11
36
Dimensions in the ( )
include a hold-down spring.
All dimensions in mm.
• Applicable Socket and Hold-down Spring
Socket
Mounting Style
DIN Rail Mount Socket
Panel Mount
Socket
Type No.
SR3P-05A
SR3P-05C
SR3P-06A
w/Solder Terminals
SR3P-511
w/Wire Wrap Terminals
SR3P-70
Hold-down
Spring
SR3P-06F3
SR3P-511F3
Characteristics (Reference Data)
• Electrical Life Curve
AC Load
DC Load
5000
110V AC resistive
1000
500
220V AC resistive
110V AC inductive
220V AC inductive
100
50
Life (× 10,000 operations)
Life (× 10,000 operations)
5000
30V DC resistive
1000
30V DC inductive
500
100
50
100V DC resistive
100V DC inductive
10
0 1 2 3 4 5 6 7 8 9 10
10
0 1 2 3 4 5 6 7 8 9 10
Load Current (A)
Load Current (A)
Internal Connection (Bottom View)
6(+)
5
7
4
8
RESET
3
(–)
9
SET
(–) 2
10 (+)
1
(04/10/25)
11
35
RH2L Series Latch Relays
Midget Power Latch Relays
DPDT — 10A contact capacity
The RH2L series latch relays have a self-holding function by
residual magnetism generated by a special magnetic material. The large 10A contact capacity equivalent to the RH and
RR series is provided in a miniature relay package as small
as the IDEC’s RH3 type.
• With a mechanical operation indicator to show the set/reset
status.
• Power saving operation by pulse inputs eliminates the need
of continuous control voltage.
• Available with plug-in or PC board mount terminals.
• All basic types are recognized by UL and certified by CSA.
RH2LB-U
(Blade Terminal)
RH2LV2-U
(PC Board Terminal)
Ordering Information
When ordering, specify the Type No. and
coil voltage code.
Types
Type No.
Coil Voltage Code ∗
RH2LB-U∗ AC6, AC12, AC24, AC50, AC100, AC120
RH2LV2-U∗ DC6, DC12, DC24
Terminal Style
Plug-in Terminal
PC Board Terminal
(Example) RH2LB-U AC120
Type No.
Coil Voltage Code
Coil Ratings
Set Coil
DC
AC (50/60Hz)
Rated Voltage
(V)
Rated Current (mA)
±15% at 20°C
50Hz
60Hz
Reset Coil
Coil Resistance (Ω)
±10% at 20°C
Rated Current (mA)
±15% at 20°C
50Hz
60Hz
Operation Characteristics
(against rated values at 20°C)
Coil Resistance (Ω)
±10% at 20°C
6
227
220
—
68.7
68
—
12
103
100
—
34.2
34
—
24
51.2
50
—
17.1
17
—
50
24.7
24
—
10.4
10.3
—
100
12.3
12
—
4.6
4.6
—
120
10.3
10
—
4.2
4.2
333
18
150
40
12
167
72
75
160
24
83
288
37.5
640
Switching Continuous
Voltage
Current
250V AC
125V DC
10A
Contact Material
Inductive
Load
Rated Load
Res.
Load
Ind.
Load
110V AC 10A
1650 VA AC 1100VA AC
220V AC 7.5A
300W DC
225W DC
30V DC 10A
7.5A
Voltage
80%
maximum
110%
80%
maximum
7.5A
50 mΩ maximum (initial value)
Set Time
30 ms maximum (AC)
20 ms maximum (DC) (at the rated voltage)
Reset Time
30 ms maximum (AC)
20 ms maximum (DC) (at the rated voltage)
Power Consumption
(approx.)
Set coil:
Reset coil:
Voltage
Resistive
General Use
7.5A
6.5A
1/3 HP
120V AC
10A
7.5A
1/6 HP
30V DC
10A
—
—
Voltage
Resistive
General Use
Motor Load
240V AC
7.5A
5A
1/3 HP
120V AC
10A
7.5A
1/6 HP
30V DC
10A
7.5A
—
1.2 VA (AC), 2W (DC)
0.5 VA (AC), 0.9W (DC)
Insulation Resistance
100 MΩ minimum (500V DC megger)
Dielectric Strength
Between live and dead parts:
2,000V AC, 1 minute
Between contact and coil:
2,000V AC, 1 minute
Between contacts of different poles:
1,500V AC, 1 minute
Between contacts of the same pole:
1,000V AC, 1 minute
Operating Frequency
Electrical: 1800 operations/h maximum
Mechanical: 18,000 operations/h maximum
Vibration Resistance
0 to 60 m/s2 (maximum frequency: 55 Hz),
Frequency: 5 to 55 Hz, Amplitude: 0.5 mm
• UL Ratings
240V AC
Silver cadmium oxide
Contact Resistance
5A
Note: Inductive load for rated load — cos ø = 0.3, L/R = 7 ms
Motor Load
• CSA Ratings
36
110%
Specifications
Maximum Contact Capacity
Allowable Contact Power
Resistive
Load
Set and Reset Voltage
—
6
Contact Ratings
Maximum Continuous
Applied Voltage
Shock Resistance
100 m/s2 minimum
Electrical Life
200,000 operations minimum
Mechanical Life
10,000,000 operations minimum
Operating Temperature
–5 to +40°C (no freezing)
Weight (approx.)
50g
(04/10/25)
RH2L Series Latch Relays
Operation Indicator
Instructions
1. Do not use the RH2L relays in environments where magnetic particles and dust are present in large quantities or
external magnetic field is strong, or in the vicinity of largecurrent circuits.
2. Do not use the RH2L relays in circuits whose power
source contains heavy surges.
3. When two or more RH2L relays are mounted in a row, separate the relays by 6 mm or more.
4. Do not energize the set and reset coils at the same time.
5. Because of the polarity of the coil, connect the DC input
voltage to correct terminals of the DC coil type.
Operation Indicator
The red flag appears when
the contacts are set.
Internal Connection (Bottom View)
1
2
5
6
8
9( – )
10
(+)12
SET
(+)14
13( – )
4
RESET
Dimensions
• RH2LB (Plug-in Terminal)
Total length from panel surface including relay socket
SH3B-05A: 61.5 (63.5) max., SH3B-51: 39.6 (41.6) max.
4.7
Dimensions in the ( )
include a hold-down spring.
4
0.5
1
5
6
9
10
8
11
14
13
6.4
35.6 max.
27.5
ø2.6 hole
31
• RH2LV2 (PC Board Terminal)
10-ø2.4 holes
10
35.6 max.
6
8
9
10
11
7.25
14
13
0.5
4.6
7.8
4
5
27.5
0.5
1
13.15
2
4.7
10
31
All dimensions in mm.
• Applicable Socket and Hold-down Spring
Socket
Mounting Style
Hold-down Spring
Type No.
DIN Rail Mount Socket
SH3B-05A
SH3B-05C
Panel Mount Socket
SH3B-51
PC Board Mount Socket
SH3B-62
SH3B-05F1
SFA-101
SFA-202
SY4S-51F1
SFA-301
SFA-302
For details about sockets and hold-down springs, see page 40.
(04/10/25)
37
RY2KS Series Latch Relays
Self-maintained Latch Relays
DPDT — 3A contact capacity
The RY2KS series latch relays have a self-holding function
using permanent magnets in the magnetic circuit. Applying a
voltage on the set (or reset) coil operates the armature and
retains the contacts in that position until the opposite coil is
energized, hence the latch relays are ideal for memory and
flip-flop circuit applications.
• Mountable in the same space as other miniature relays
using the same sockets.
• Recognized by UL and certified by CSA.
Types
Terminal
Style
Plug-in
Terminal
Type
Coil Voltage Code ∗
Type No.
Basic
RY2KS-U∗
With Check Button
RY2KS-UC∗
Ordering Information
AC6, AC12, AC24, AC50,
AC100, AC120
DC6, DC12, DC24, DC48,
DC100, DC110
When ordering, specify the Type No. and
coil voltage code.
(Example) RY2KS-U AC120
Type No.
Coil Voltage Code
Coil Ratings
Rated Current (mA) ±15% at 20°C
Coil Resistance (Ω)
±10% at 20°C
Rated Voltage (V)
DC
AC (50/60Hz)
6
12
24
50
100
120
6
12
24
48
100
110
50Hz
60Hz
260
120
58
27
13.5
11.2
250
115
56
26
13
10.8
6.3
30.3
132
606
2,630
3,840
30
120
480
1,920
8,330
10,000
200
100
50
25
12
11
Contact Ratings
Switching Continuous
Voltage
Current
250V AC
125V DC
3A
660VA AC
90W DC
Inductive
Load
Rated Load
Voltage
Res.
Load
Ind.
Load
110V AC
3A
1.5A
176VA AC 220V AC
45W DC
30V DC
3A
0.8A
3A
1.5
Contact Material
Contact Resistance
Set Time
Reset Time
Power Consumption
(approx.)
Insulation Resistance
100V DC 0.2A 0.12A
Note: Inductive load for rated load — cos ø = 0.3, L/R = 7 ms
Dielectric Strength
• UL Ratings
Voltage
Resistive
General Use
240V AC
3A
0.8A
120V AC
3A
1.5A
30V DC
3A
—
Operating Frequency
Temperature Rise
• CSA Ratings
38
110%
80%
maximum
110%
80%
maximum
Specifications
Maximum Contact Capacity
Allowable Contact Power
Resistive
Load
Operation Characteristics
(against rated values at 20°C)
Maximum Continuous
Set and Reset Voltage
Applied Voltage
Vibration Resistance
Voltage
Resistive
General Use
240V AC
3A
0.8A
120V AC
3A
1.5A
100V DC
—
0.2A
30V DC
3A
1.5A
Shock Resistance
Electrical Life
Mechanical Life
Operating Temperature
Weight (approx.)
Gold-plated silver
50 mΩ maximum (initial value)
25 ms maximum (at the rated voltage)
25 ms maximum (at the rated voltage)
AC: 1.6 VA (50 Hz), 1.5 VA (60 Hz)
DC: 1.2W
100 MΩ minimum (500V DC megger)
Between live and dead parts:
1,500V AC, 1 minute
Between contact and coil:
1,000V AC, 1 minute
Between contacts of different poles:
1,000V AC, 1 minute
Between contacts of the same pole:
700V AC, 1 minute
Electrical: 1800 operations/h maximum
Mechanical: 18,000 operations/h maximum
Coil: 85°C maximum, Contact: 65°C maximum
0 to 60 m/s2 (maximum frequency: 55 Hz),
Frequency: 5 to 55 Hz, Amplitude: 0.5 mm
200 m/s2 minimum
200,000 operations minimum
5,000,000 operations minimum
–5 to +40°C (no freezing)
67g
(04/10/25)
RY2KS Series Latch Relays
Characteristics (Reference Data)
• Electrical Life Curve
AC Load
DC Load
5000
5000
Life (× 10,000 operations)
Life (× 10,000 operations)
30V DC resistive
1000
110V AC resistive
220V AC resistive
500
100
50
10
0
1
30V DC inductive
1000
500
100
50
110V AC inductive
220V AC inductive
2
3
10
0
100V DC resistive
100V DC inductive
1
2
3
Load Current (A)
Load Current (A)
Internal Connection (Bottom View)
1
4
5
8
9( – ) 10
13( – )
11 ( + )12
SET
( + )14
RESET
Dimensions
2.6
Total length from the panel surface including relay socket
SY4S-05A: 81.3 (83.3) max., SY4S-51: 59.3 (62.3) max.
Dimensions in the ( )
include a hold-down spring.
2.2 × ø1.2 oblong hole
1
4
9
8
10
11
14
13
55.3 max.
6.4
12
27.5
0.5
5
21
All dimensions in mm.
• Applicable Socket and Hold-down Spring
Socket
Mounting Style
Hold-down Spring
Type No.
DIN Rail Mount Socket
SY4S-05A
SY4S-05C
Panel Mount Socket
SY4S-51
SY4S-61
PC Board Mount Socket
SY4S-62
SFA-202
SY4S-51F3
(SY4S-02F3)
SFA-302
SY4S-51F3
(SY4S-02F3)
Notes:
1. For the relays with check button, use the parenthesized holddown springs shown in the above table. When the spring is
used, sockets cannot be mounted closely side by side.
2. Leaf springs come in pairs.
3. Use the hold-down springs in environments where the relays are
subject to vibrations or shocks.
For details about sockets and hold-down springs, see page 40.
(04/10/25)
39
Relay Sockets
Socket Selection Guide
Mounting
Style
Series
SR
SH
DIN Rail
Mount
SM
Type No.
Type
No. of
Color
Poles
Terminal Screw
Applicable Wire
Approvals
Standard
Finger-safe
SR2P-06A
Standard
Black
—
SR3P-05A
Standard
Black
—
SR3P-05C
Finger-safe
Gray
UL, CSA, TÜV
SR3P-06A
Standard
SR3B-05A
Standard
SH1B-05A
Standard
SH1B-05C
Finger-safe
SH2B-05A
Standard
SH2B-05C
Finger-safe
SH2B-05D
Slim
SH3B-05A
Standard
SH3B-05C
Finger-safe
SH4B-05A
Standard
SH4B-05C
Finger-safe
SM2S-05A
Standard
SM2S-05C
Finger-safe
Black
3
Gray
M3.5
2 mm2 max.
UL, CSA, TÜV
M3.5
2
Black 2 mm max.
—
3
Black
—
—
1
Black M3.5
(coil terminal: M3)
Gray 2 mm2 max.
2
3
4
—
Gray
UL, CSA, TÜV
Black
—
M3.5
2 mm2 max.
—
Gray
—
Gray
UL, CSA, TÜV
Gray
250V, 10A
Page
RR2P, GT3 (8-pin), GT5P
43
RR3P, RR3PA, RR2KP,
GT3 (11-pin)
250V, 10A
RR1BA, RR2BA, RR3B
250V, 10A
RH1B
(coil terminal: 7A)
—
M3
2 mm2 max.
UL, CSA, TÜV
44
RH2B
250V, 10A
RH3B, RH2LB
UL, CSA, TÜV
Black
Black
2
UL, CSA, TÜV
Black
Black
Applicable Relay, etc.
—
SR2P-05A
SR2P-05C
2
Rated Insulation
Voltage/
Rated Current
45
RH4B
250V, 7A
250V, 7A
(UL, TÜV: 10A)
RM2S, RU2S, GT5Y-2
46
2
SY
SM2S-05D
Slim
SY2S-05A
Standard
SY2S-05C
Finger-safe
SY4S-05A
SY4S-05C
SY4S-05D
Slim
SU2S-11L
Black
—
Gray
UL, CSA, TÜV
Standard
M3
2
Black 2 mm max.
Finger-safe
Gray
UL, CSA, TÜV
Spring-clamp
SU4S-11L
Spring-clamp
SR2P-511
Solder
SR2P-70
Wire-wrap
SR3P-511
Solder
SR3P-70
Wire-wrap
SR3B-51
Solder
SH1B-51
Panel
Mount
SH
SM
SH2B-51
4
PC Board
Mount
SM
Gray
Solid wire:
0.2 to 1.5 mm2
Stranded wire:
0.2 to 1.25 mm2
2
4
—
2
—
250V, 10A
RU2S, RM2S, GT5Y-2
250V, 6A
RU4S, RU42S, RY4S,
GT5Y-4
UL, CSA
—
—
UL, CSA
3
—
—
—
UL, CSA
1
—
UL, CSA
250V, 10A
RR3P, RR3PA, RR2KP,
RR1BA, RR2BA, RR3B
250V, 10A
RH1B
(coil terminal: 7A)
UL, CSA
UL, CSA
SH4B-51
4
—
UL, CSA
2
—
UL, CSA
250V, 10A
2
—
UL, CSA
250V, 7A
RY2S, RY22S
RY4S, RY2KS, RU4S,
RU42S, GT5Y-U
Solder
SY4S-51
Solder
SH2B-62
Black
Black
RH3B, RH2LB
RH4B
RM2S, RU2S, GT5Y-2
4
—
UL, CSA
250V, 7A (Note)
1
—
UL, CSA
250V, 10A
RH1B
(coil terminal: 7A)
—
UL, CSA
3
—
UL, CSA
SH4B-62
4
—
UL, CSA
RH4B
—
UL, CSA
RM2S, RU2S, GT5Y-2
—
UL, CSA
—
UL, CSA
250V, 7A
RY2S, RY22S
—
UL, CSA
250V, 7A (Note)
—
UL, CSA
250V, 7A
RY4S, RY2KS, RU4S,
RU42S, GT5Y-U
SM2S-61
SM2S-62
PC board
SY4S-61
SY4S-62
2
2
Black
Black
2
PC board
4
Black
49
RH2B
250V, 10A
SH3B-62
PC board
48
RR2P, GT3 (8-pin), GT5P
—
SM2S-51
2
250V, 6A
UL, CSA, CE
—
Black
47
RY4S, RY2KS, RU4S,
RU42S, GT5Y-U
—
SY2S-61
SY
M3, 1.25 mm2
(2 mm2 max.)
RY2S, RY22S
250V, 7A
3
Solder
SH1B-62
SH
Black
—
250V, 10A
SH3B-51
SY2S-51
SY
—
Black
2
SU
SR
M3, 1.25 mm
(2 mm2 max.)
50
RH2B
250V, 10A
RH3B, RH2LB
250V, 10A
51
RM2S, RU2S
52
Note: When using only 2 poles of the 4-pole sockets SY4S-51 and SY4S-61, the UL rated current is 10A.
• Terminal Screw Tightening Torque for DIN Rail Mount Sockets
40
Socket Series
Terminal Screw Tightening Torque
Socket Series
Terminal Screw Tightening Torque
SR
1.0 to 1.3 N·m
SM
0.6 to 1.0 N·m
SH
1.0 to 1.3 N·m
SY
0.6 to 1.0 N·m
(04/10/25)
Relay Sockets
Sockets and Applicable Hold-down Springs
• DIN Rail Mount Sockets
Socket
Type No.
SR2P-05A
SR2P-05C
SR2P-06A
SR3P-05A
SR3P-05C
SR3P-06A
Applicable Relays and
Timers
• Panel Mount Sockets and PC Board Mount Sockets
Hold-down Spring
Socket
Type No.
RR2P
SR2B-02F1
—
GT5P
—
SFA-203
RR2P
SR2B-02F1
SFA-202
GT5P
—
SFA-202
RR3P, RR3PA
SR3P-01F1
—
RR3P, RR3PA
SR3B-02F1
—
RR2KP
SR3P-511F3
—
RR2KP
—
SFA-402
GT3 (8-pin), GT5P
RR2P
SR2P-511
SR2P-70
SR3P-511
SR3P-70
SR3P-06F3
—
GT3 (11-pin)
—
SFA-203
SR3B-51
RR3P, RR3PA
SR3B-02F1
SFA-202
RR2KP
SR3P-06F3
—
SH1B-51
SH1B-62
—
SFA-202
SH2B-51
RR1BA, RR2BA, RR3B
SR3B-02F1
SFA-202
SH1B-05A
SH1B-05C
RH1B
SY2S-02F1
SFA-101
SFA-202
RH2B
SY4S-02F1
SFA-101
SFA-202
RH2B-R
—
SFA-202
RH2B
—
SFA-502
RH2B-R
—
SFA-511
SH3B-05F1
SFA-101
SFA-202
SH4B-02F1
SFA-101
SFA-202
SM2S-62
SY4S-02F1
SFA-101
SFA-202
SY2S-51
SY2S-61
SH3B-05A
SH3B-05C
SH4B-05A
SH4B-05C
SM2S-05A
SM2S-05C
SM2S-05D
SY2S-05A
SY2S-05C
SY4S-05A
SY4S-05C
SY4S-05D
SU2S-11L
SU4S-11L
RH3B, RH2LB
RH4B
RM2S, RU2S
GT5Y-2
—
SFA-202
RM2S, RU2S
—
SFA-502
GT5Y-2
—
SFA-511
SY2S-02F1
SFA-101
SFA-202
RY2S, RY22S
SY4S-02F1
SFA-101
SFA-202
RY2KS, GT5Y-4
—
SFA-202
RY4S, RU4S, RU42S
—
SFA-502
RY2KS, GT5Y-4
—
SFA-511
RU2S, RM2S
—
SFA-101
SFA-202
GT5Y-2
—
SFA-202
RU4S, RU42S, RY4S
—
SFA-101
SFA-202
GT5Y-4
—
SFA-202
RY4S, RU4S, RU42S
Wire Spring
—
—
SFA-402
—
SFA-302
GT3 (8-pin)
RR1BA, RR2BA, RR3B
Leaf Spring
SR3P-01F1
GT3 (11-pin)
SR3B-05
SH2B-05D
Hold-down Spring
Leaf Spring
GT3 (11-pin)
SH2B-05A
SH2B-05C
Applicable Relays and
Timers
Wire Spring
SR3B-02F1
—
RH1B
SY4S-51F1
SFA-301
SFA-302
RH2B
SY4S-51F1
(SY4S-02F1)
SFA-301
SFA-302
—
SFA-302
RH2B-R
RH2B
SY4S-51F1
(SY4S-02F1)
SH3B-51
SH3B-62
RH3B, RH2LB
SY4S-51F1
(SH3B-05F1)
SFA-301
SFA-302
SH4B-51
SH4B-62
RH4B
SY4S-51F1 × 2
(SH4B-02F1)
SFA-301
SFA-302
SY4S-51F1
(SY4S-02F1)
SFA-301
SFA-302
SH2B-62
SM2S-51
SM2S-61
SY4S-51
SY4S-61
RM2S, RU2S
GT5Y-2
—
—
SFA-302
RM2S, RU2S
SY4S-51F1
(SY4S-02F1)
—
RY2S, RY22S
SY4S-51F1
SFA-301
SFA-302
RY4S, RU4S, RU42S
SY4S-51F1
(SY4S-02F1)
SFA-301
SFA-302
RY2KS
SY4S-51F3
(SY4S-02F3)
SFA-302
GT5Y-4
—
SFA-302
RY4S, RU4S, RU42S
SY4S-51F1
(SY4S-02F1)
—
RY2KS
SY4S-51F3
(SY4S-02F3)
—
SY4S-62
Note 1: When mounting relays with check button on panel mount or PC board
mount sockets, use hold-down springs shown in ( ). Hold-down
springs for relays with check button are not available for SR2P-511,
SR2P-70, SR3P-511, and SR3P-70.
Note 2: For close mounting of panel mount or PC board mount sockets, use
wire springs or SFA-302 leaf springs.
Note 3: SM2S-62 and SY4S-62 sockets cannot be used on GT5Y-2 and
GY5Y-4 timers.
• Hold-down Springs
Type
Type No.
Ordering Type No.
SR2B-02F1
SR2B-02F1PN10
SR3B-02F1
SR3B-02F1PN10
SR3P-01F1
SR3P-01F1PN10
SR3P-06F3
SR3P-06F3PN10
Package
Quantity
SR2B-02F1
SR3B-02F1
SR3P-01F1
SR3P-06F3
SR3P-511F3
SH3B-05F1
SH4B-02F1
SY4S-02F1
SY2S-02F1
SY4S-02F3
SY4S-51F1
SY4S-51F3
SFA-101
SFA-202
SFA-203
SFA-301
SFA-302
SFA-402
SFA-502
SFA-511
SR3P-511F3 SR3P-511F3PN10
Wire
Spring
Leaf
Spring
(04/10/25)
SH3B-05F1
SH3B-05F1PN10
SH4B-02F1
SH4B-02F1PN10
SY2S-02F1
SY2S-02F1PN10
SY4S-02F1
SY4S-02F1PN10
SY4S-02F3
SY4S-02F3PN10
SY4S-51F1
SY4S-51F1PN10
SY4S-51F3
SY4S-51F3PN10
SFA-101
SFA-101PN20
SFA-202
SFA-202PN20
SFA-203
SFA-203PN20
SFA-301
SFA-301PN20
SFA-302
SFA-302PN20
SFA-402
SFA-402PN20
SFA-502
SFA-502PN20
SFA-511
SFA-511PN20
10
20
(10 pairs)
41
Relay Sockets
Accessories for Sockets
Name
Appearance
DIN Rail
Specifications
Type No.
Ordering
Type No.
Package
Quantity
Aluminum
BAA1000
Weight: Approx. 200g
BAA1000PN10
10
Steel
BAP1000
Weight: Approx. 320g
BAP1000PN10
10
BNL5PN10
10
BNL5
Zinc-plated steel
Weight: Approx. 15g
Mounting Clip
DIN Rail
Spacer
Plastic (black)
End Spacer
Length: 1m
Width: 35 mm
Used on a DIN rail to fasten
relay sockets
BNL6
BNL6PN10
10
SA-406B
SA-406B
1
SA-203B
SA-203B
1
SA-204B
SA-204B
1
Plastic (black)
Intermediate
Spacer
Remarks
Thickness: 5 mm
Used for adjusting spacing
between sockets mounted
on a DIN rail
Used for mounting DIN rail
mount sockets directly on a
panel surface
• Accessories for SU Sockets
Screwdriver
Jumper
Diode Module
RC Module
LED Module
42
Appearance
2.5
Name
75
Specifications
Type No.
Weight: Approx. 20g
BC1S-SD0
Ordering
Type No.
BC1S-SD0
Package
Quantity
Remarks
1
Used for wiring spring-clamp
terminals on the SU sockets
145
SU9Z-J5
SU9Z-J5PN10
10
Used for interconnecting
relay coil terminals on a
maximum of five SU sockets;
can be cut to required
lengths
SU9Z-D11
SU9Z-D11PN10
10
A1: –
A2: +
SU9Z-D12
SU9Z-D12PN10
10
A1: +
A2: –
6 to 240V AC
SU9Z-R21
SU9Z-R21PN10
10
For absorbing surge voltages in AC coils
6 to 12V AC/DC
SU9Z-L31
SU9Z-L31PN10
10
24 to 48V AC/DC
SU9Z-L32
SU9Z-L32PN10
10
100 to 120V AC/DC
SU9Z-L33
SU9Z-L33PN10
10
200 to 240V AC/DC
SU9Z-L34
SU9Z-L34PN10
10
Brass jumper
with ABS sheath
Rated current: 3A
Weight: Approx. 3g
6 to 220V DC
For absorbing
surge voltages
in DC coils
Non-polarized LED indicator; goes on when the relay
coil is energized
(04/10/25)
Relay Sockets
DIN Rail Mount Sockets
SR Series
• SR2P-05A
36
8
When using
BAA/BAP: 32
M3.5 Terminal
Screw
DIN Rail
(BAA/BAP)
Terminal Arrangement
ø25
33
52
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
5
4
6
3
7
2
8
1
29
4.4 max.
ø4.2 hole
5 min.
(Top View)
3
16.5
29
20
7.9 max.
28.5
• SR2P-05C
ø3.6 min.
When using
BAA/BAP: 33.5
36
7
DIN Rail
(BAA/BAP)
Terminal Arrangement
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
58
ø5
21.5
29
2.2
• SR2P-06A
4
3
7
2
8
1
29
ø4.2 hole
PRODUCT SERVICE
5
6
(Top View)
Ring type crimping
terminals cannot be used.
30
40
When using
BAA/BAP: 25.5
8
M3.5 Terminal
Screw
DIN Rail
(BAA/BAP)
Terminal Arrangement
60
ø25
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
4.9 max.
5 min.
4
3
7
8
1
2
(Top View)
18
1
5
33
ø4.2 hole
33
6
7.9 max.
22
ø3.6 min.
• SR3P-05A
42
8
M3.5 Terminal
Screw
When using
BAA/BAP: 32
DIN Rail
(BAA/BAP Types)
Terminal Arrangement
ø27
33
52
2-ø4.2 Mounting Hole
(or M4 Tapped Holes)
4.4 max.
ø4.2 hole
20
3
• SR3P-05C
9
When using
BAA/BAP: 33.5
42
5 min.
58
2
(Top View)
ø3.6 min.
DIN Rail
(BAA/BAP)
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
ø4.2 hole
1
7.9 max.
ø
5
7
3
10 11
16.5
28.5
5
4
8
34
34
6
7
34
Terminal Arrangement
7
6
5
4
8
3
9
10 11
1
2
PRODUCT SERVICE
2.2
(Top View)
34
21.5
30
(04/10/25)
Ring type crimping
terminals cannot be used.
43
Relay Sockets
• SR3P-06A
59
M3.5 Terminal
Screw
8
When using
BAA/BAP: 25.5
DIN Rail
(BAA/BAP)
Terminal Arrangement
60
ø27
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
8
7
6
9
10 11
5
4
2
3
33
ø4.2 hole
4.9 max.
5 min.
1
1
(Top View)
18
33
7.9 max.
22
ø3.6 min.
• SR3B-05
When using
BAA/BAP: 28.5
36
8
Terminal Arrangement
DIN Rail
(BAA/BAP)
M3.5 Terminal
Screw
6
5
4
3
2
1
37
56
76
4.2
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
A
B
4.4 max.
5.5 min.
9
7
8
(Top View)
PRODUCT SERVICE
2
7.9 max.
14.5
37
43
ø3.6 min.
25
SH Series
• SH1B-05A
When using
BAA/BAP: 28.5
17
8
DIN Rail
(BAA/BAP)
18
Terminal Arrangement
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
5
1
47
67
4.2
M3.5 Terminal
Screw
16
13
9
(Top View)
14.5
20
14
4 max.
4.4 max.
16
2.5
4.8 min.
5.5 min.
M3 Terminal
Screw
ø3.2 min.
ø3.6 min.
25
7.9 max.
5.9 max.
(For terminals 1, 5, and 9)
• SH1B-05C
When using
BAA/BAP: 33
17
M3.5 Terminal
Screw
7
(For terminals 13 and 14)
25
DIN Rail
(BAA/BAP)
Terminal Arrangement
5
ø5
1
69
48
4.2
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
16
M3 Terminal
Screw
14
13
9
18.7
16
1.7
PRODUCT SERVICE
20
Ring type crimping
terminals cannot be used.
• SH2B-05A
When using
BAA/BAP: 28.5
22
8
18
Terminal Arrangement
47
67
DIN Rail
(BAA/BAP)
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
4.2
M3.5 Terminal
Screw
2.5
8
5
4
1
14
13
12
9
26
4.4 max.
44
(Top View)
29.5
26
14.5
30
25
5.5 min.
(Top View)
7.9 max.
ø3.6 min.
(04/10/25)
Relay Sockets
• SH2B-05C
When using
BAA/BAP: 33
22
M3.5 Terminal
Screw
7
25
DIN Rail
(BAA/BAP)
Terminal Arrangement
ø5
8
5
4
1
14
13
12
9
69
49
4.2
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
26
26
30
1.7
• SH2B-05D
29.5
When using
M3.5 Terminal BAA/BAP: 34.5
Screw
19.5
28
6.7
Ring type crimping
terminals cannot be used.
18.7
PRODUCT SERVICE
DIN Rail
(BAA/BAP)
(Top View)
2-M3 or M4
(or 4.5 Mounting Holes)
Terminal Arrangement
4 1
4.5
19
8
(Top View)
30
• SH3B-05A
When using
BAA/BAP: 28.5
32
8
18
DIN Rail
(BAA/BAP)
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
47
67
4.2
M3.5 Terminal
Screw
Terminal Arrangement
8
6
5
4
2
1
36
4.4 max.
5.5 min.
14
12
2.5
9
14 13
ø3.6 min.
• SH3B-05C
12
68
57
6.6 max.
19
5
5.8 min.
6
68
78
4.3 max.
8
14.5
36
32
7.9 max.
ø3.6 min.
When using
BAA/BAP: 33
M3.5 Terminal
Screw
7
9
(Top View)
25
40
13
10
25
DIN Rail
(BAA/BAP)
Terminal Arrangement
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
8
6
5
4
2
1
69
49
4.2
ø5
36
14
PRODUCT SERVICE
1.7
12
18.7
36
Ring type crimping
terminals cannot be used.
• SH4B-05A
When using
BAA/BAP: 28.5
42
8
18
DIN Rail
(BAA/BAP)
47
67
Terminal Arrangement
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
4.2
M3.5 Terminal
Screw
8
4
5.5 min.
2.5
6
5
2
1
11
10
14
12
(04/10/25)
7
3
46
4.4 max.
50
9
(Top View)
29.5
40
46
13
10
14.5
25
13
9
(Top View)
7.9 max.
ø3.6 min.
45
Relay Sockets
• SH4B-05C
When using
BAA/BAP: 33
42
25
7
DIN Rail
(BAA/BAP)
Terminal Arrangement
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
8
4
7
3
6
5
2
1
11
10
69
49
4.2
ø5
46
14
12
Ring type crimping
terminals cannot be used.
PRODUCT SERVICE
18.7
1.7
46
13
9
(Top View)
29.5
50
SM Series
• SM2S-05A
When using
BAA/BAP: 28.5
0.7
30
6
18
DIN Rail
(BAA/BAP)
M3 Terminal
Screw
Terminal Arrangement
8
5
4
1
14
13
12
9
62
45
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
4.2
26
4 max.
4.8 min.
(Top View)
3
18.5
26
5.9 max.
25
ø3.2 min.
• SM2S-05C
When using
BAA/BAP: 32.5
25
30
6
M3 Terminal
Screw
DIN Rail
(BAA/BAP)
Terminal Arrangement
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
18
46
26
8
5
4
1
14
13
12
9
26
18.2
2
PRODUCT SERVICE
1.6
64
4.2
ø5.5
Ring type crimping
terminals cannot be used.
(Top View)
29
• SM2S-05D
When using
BAA/BAP: 33.5
18.4
M3 Terminal
Screw
22
6
DIN Rail
(BAA/BAP)
2-M3 or M4
(or 4.5 Mounting Holes)
Terminal
Arrangement
4
5.3 min.
1
5
59
52
69.5
59
3.7 max.
8
5.9 max.
ø3.2 min.
5
14
4.5
15
46
12
30
6
9
13
15
(Top View)
(04/10/25)
Relay Sockets
SY Series
• SY2S-05A
When using
BAA/BAP: 28.5
17
6
DIN Rail
(BAA/BAP)
18
M3 Terminal
Screw
45
4.2
62
8
5
4
1
14
13
12
9
16
4 max.
16
2
Terminal Arrangement
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
4.8 min.
(Top View)
14.5
20
5.9 max.
25
ø3.2 min.
• SY2S-05C
17.2
When using
BAA/BAP: 32.5
M3 Terminal
Screw
6
DIN Rail
(BAA/BAP)
25
Terminal Arrangement
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
8
5
4
1
14
13
12
9
• SY4S-05A
46
16
Ring type crimping
terminals cannot be used.
18.2
16
20
When using
BAA/BAP: 28.5
0.7
30
6
Terminal Arrangement
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
45
62
DIN Rail
(BAA/BAP)
18
M3 Terminal
Screw
8
7 6
5
4
3 2
1
26
4.2
4 max.
4.8 min.
14
13
12 11 10 9
18.5
3
(Top View)
29
2
PRODUCT SERVICE
1.6
64
4.2
ø5
26
(Top View)
5.9 max.
25
• SY4S-05C
ø3.2 min.
When using
BAA/BAP: 32.5
30
M3 Terminal
Screw
6
DIN Rail
(BAA/BAP)
25
18
8
7 6
5
4
3 2
1
64
46
4.2
ø5.5
Terminal Arrangement
2-ø4.2 Mounting Holes
(or M4 Tapped Holes)
26
14
13
12 11 10 9
18.2
26
• SY4S-05D
Ring type crimping
terminals cannot be used.
When using
BAA/BAP: 33.5
29
6
M3 Terminal
Screw
DIN Rail
(BAA/BAP)
18.4
2-M3 or M4
(or 4.5 Mounting Holes)
3.7 max.
Terminal
Arrangement
3
2
1
8
7
6
5
12
11
10
9
4
14
13
5.3 min.
59
52
69.5
59
(Top View)
29
2
1.6
PRODUCT SERVICE
5.9 max.
5
ø3.2 min.
4.5
22
(04/10/25)
6
30
22
(Top View)
47
Relay Sockets
SU Series
• SU2S-11L
31
Terminal Arrangement
12 11 10
2-ø3.2
Mounting Holes
8
7
6
5
4
3
2
1
28.8
37.5
80
24.0
9
14
4.4
32
35.3
• SU4S-11L
Ring type crimping
terminals cannot be used.
13
(Top View)
31
Terminal Arrangement
12 11 10
2-ø3.2
Mounting Holes
7
6
5
4
3
2
1
28.8
37.5
80
24.0
9
8
14
4.4
32
35.3
Ring type crimping
terminals cannot be used.
13
(Top View)
Panel Mount Sockets
SR Series
Panel
Surfarface
2-ø3.5 Mounting Holes
(or M3 Tapped Holes)
34
4
5
1
8
3
6
2
2.5
10 11
7
38
Terminal Arrangement
ø29
38
50
6
4.2
ø3
0
• SR2P-511
(Bottom View)
2.5
Panel
Surfarface
2-ø3.5 Mounting Holes
(or M3 Tapped Holes
Terminal Arrangement
5
ø29
38
50
4
3
6
2
7
8
1
34
10 17.5
2.5
38
6
4.2
ø3
0
• SR2P-70
(Bottom View)
2.5
Panel
Surfarface
• SR3P-511
6
4.2
2-ø3.5 Mounting Holes
(or M3 Tapped Holes)
Terminal Arrangement
2
34
2.5
10 11
9
10
38
8
1 11
ø3
0
ø29
38
50
5 6 7
4
3
(Bottom View)
2.5
48
(04/10/25)
Relay Sockets
Panel
Surfarface
• SR3P-70
6
4.2
2-ø3.5 Mounting Holes
(or M3 Tapped Holes)
Terminal Arrangement
34
(Bottom View)
10 17.5
2.5
1 11
38
8
9
10
2
ø3
0
ø29
38
50
5 6 7
4
3
2.5
• SR3B-51
32
0.3
35
43
51.5
Terminal Arrangement
1
4
2
5
3
6
7
8
9
A
6.5
3
22
B
35.5∗
22
2-ø4.2 Mounting Holes
(M4 Tapped Holes)
(Bottom View)
(Tolerance ±0.3)
∗ When two or more sockets are
mounted side by side:
L = 38 (N – 1) + 35.5
N: No. of sockets mounted
3.5
35
PRODUCT SERVICE
6.75
32.5
43
11 max.
7.5
11.5 min.
38
SH Series
Panel Thickness:
1 to 2
[18 (N–1) + 12.4] +0.5
0
Terminal Arrangement
31
25.4
1
5
9
25.6 +0.2
0
• SH1B-51
3
(Bottom View)
11
18.7
3.5
N: No. of sockets mounted
5.4 min.∗
0.3
13 14
18
∗ 10.4 min. when using hold-down springs
2.4
12.2
[27 (N–1) + 21.4]
+0.5
0
Terminal Arrangement
1 4
5 8
9 12
25.6
31
25.4
Panel Thickness:
1 to 2
+0.2
0
• SH2B-51
(Bottom View)
11
18.7
5.4 min.∗
0.3
13 14
3
27
N: No. of sockets mounted
∗ 10.4 min. when using hold-down springs
3.5
21.2
[36 (N–1) + 30.4] +0.5
0
1 2 4
5 6 8
9 10 12
11
18.7
3.5
0.3
13
3
36
+0.2
0
Terminal Arrangement
25.6
31
25.4
Panel Thickness:
1 to 2
14
(Bottom View)
5.4 min.∗
• SH3B-51
N: No. of sockets mounted
∗ 10.4 min. when using hold-down springs
30.2
(04/10/25)
49
Relay Sockets
Panel Thickness:
1 to 2
[45 (N–1) + 39.4] +0.5
0
Terminal Arrangement
0.3
13
3
45
+0.2
0
25.6
31
25.4
1 2 3 4
5 6 7 8
9 10 11 12
14
(Bottom View)
5.4 min.∗
• SH4B-51
11
18.7
N: No. of sockets mounted
∗ 10.4 min. when using hold-down springs
3.5
39.2
SM Series
Panel Thickness:
1 to 2
[27 (N–1) + 21.4] +0.5
0
25.4
31
4
8
1
5
9
12
14
0.3
13
3
27
25.6 +0.2
0
Terminal Arrangement
5.4 min.∗
• SM2S-51
(Bottom View)
11
18.7
N: No. of sockets mounted
∗ 10.4 min. when using hold-down springs
2.4
21.2
SY Series
• SY2S-51
Panel Thickness:
1 to 2
[18(N–1)+12.4] +0.5
0
0
13 14
(Bottom View)
11
18.7
N: No. of sockets mounted
5.4 min.∗
3
25.6
25.4
1 4
5 8
9 12
0.3
31
18
+0.2
Terminal Arrangement
∗ 10.4 min. when husing hold-down springs
2.4
12.2
[27 (N–1) + 21.4] + 0.5
0
3
27
11
18.7
2.4
0.3
13
14
(Bottom View)
0
1 2 3 4
5 6 7 8
9 10 11 12
+0.2
Terminal Arrangement
25.6
31
25.4
Panel Thickness:
1 to 2
5.4 min.∗
• SY4S-51
N: No. of sockets mounted
∗ 10.4 min. when using hold-down springs
21.2
50
(04/10/25)
Relay Sockets
PC Board Mount Sockets
SH Series
• SH1B-62
11.85
0.3
3
18 min.
4.4
(Bottom View)
31 min.∗
11
5.95
31
25.4
1
5
9
13 14
18
6.8
3-ø2.4 holes
4.7
6.95
Terminal Arrangement
15
2
1.5
2-ø2 holes
(Tolerance ±0.1)
∗ 36 min. when using
hold-down springs
Terminal Arrangement
0.3
4.7
25.4
15.5
10
14
(Bottom View)
29 min.∗ 12.5
29
13
3
21.2
21.5 min.
2.85
1 4
5 8
9 12
11
15
2
6.6
• SH2B-62
5.65
12.2
8-ø2.4 holes
(Tolerance ±0.1)
∗ 34 min. when using
hold-down springs
• SH3B-62
36 min.
Terminal Arrangement
0.3
21.3
4.7
10 10
14
12.5
6.65
31
25.4
1 2 4
5 6 8
9 10 12
13
3
36
7.35
(Bottom View)
31 min.∗
6.6
11
15
2
11-ø2.4 holes
(Tolerance ±0.1)
∗ 36 min. when using
hold-down springs
30.2
Terminal Arrangement
6.85
1 2 3 4
5 6 7 8
9 10 11 12
0.3
4.7
6.65
13
10 10 10
14
(Bottom View)
31 min.∗
11
15
2
6.6
3
45
45 min.
31.3
12.5
31
25.4
• SH4B-62
14-ø2.4 holes
∗ 36 min. when using
hold-down springs
39.2
(Tolerance ±0.1)
SM Series
• SM2S-61
15
1.5
(Bottom View)
13.8 min.
9
4.1
10.4
13.2
16.8
4
8
12
14
∗ 19.2 min. when using
hold-down springs
9-ø2 holes
1.4
3
11
1
5
9
13
14.2 min.∗
27
0.3
31
25.4
Terminal Arrangement
(Tolerance ±0.1)
21.2
(04/10/25)
51
Relay Sockets
• SM2S-62
13.2
3
4.1
9
1.4
21.2
4
8
12
14
1
5
9
13
8.2 min.∗∗
16.8
10.4
29
0.3
Terminal Arrangement
(Bottom View)
9-ø2 holes
12.2 min.∗
11
15
(Tolerance ±0.1)
∗ 17.2 min. when using a hold-down spring.
∗∗ 13.2 min. when using a hold-down spring for
the relay with check button.
1.5
SY Series
14.2 min.∗
0.3
13 14
3
18
(Bottom View)
11
15
13.6 min.
9
10.4
1 4
5 8
9 12
4.4
16.8
31
25.4
Terminal Arrangement
4.1
• SY2S-61
8-ø2 holes
∗ 19.2 min. when using
hold-down springs
1.5
(Tolerance ±0.1)
12.2
• SY4S-61
13.2
13.8 min.
3
(Bottom View)
11
9
15-ø2 holes
1.4
15
16.8
1 2 3 4
5 6 7 8
9 10 1112
13
14
4.4
14.2 min.∗
27
0.3
31
25.4
Terminal Arrangement
4.1
10.4
8.8
(Tolerance ±0.1)
∗ 19.2 min. when using
hold-down springs
1.5
21.2
• SY4S-62
13.2
8.2 min.∗∗
8.8
15
52
1.4
12.2 min.∗
(Bottom View)
3
11
1.5
16.8
10.4
0.3
29
21.2
1 2 3 4
5 6 7 8
9 10 1112
13
14
9
4.1
4.4
Terminal Arrangement
15-ø2 holes
(Tolerance ±0.1)
∗ 17.2 min. when using a hold-down spring.
∗∗ 13.2 min. when using a hold-down spring for
the relay with check button.
(04/10/25)
Relay Sockets
Accessories
DIN Rails
Material
Type No.
Ordering Type No.
Package Quantity
Aluminum
BAA1000
BAA1000PN10
10
Steel
BAP1000
BAP1000PN10
10
BAA/BAP
12.5 12.5
BAP
1.7
BAA:31
BAP:27
35
The BAA is a 35-mm-wide DIN rail made of durable extruded aluminum.
The BAP is a 35-mm-wide DIN rail made of rust
proof sheet steel.
25
5.5
BAA
7.5
Mounting Clip
Application Example of Mounting Clip and DIN Rail Spacer
9-mm wide
Use DIN rail spacers for adding space between adjoining sockets to
prevent miswiring and identify wiring groups.
BNL5
9-mm wide
BNL6
10 mm
Two spacers
Use of the BNL5 or BNL6 mounting clip is recommended at the both ends of the socket row mounted on the DIN rail to prevent the sockets from
moving sideways.
Type No.
Ordering Type No.
Package Quantity
BNL5
BNL5PN10
10
BNL6
BNL6PN10
10
5 mm
Two spacers
10 mm
Two spacers
Installation of Mounting Clip and DIN Rail Spacer
DIN Rail
(BAA/BAP)
DIN Rail Spacer
Mounting Clip
BNL5
Spacers of 5-mm thick are designed to provide
spacing between DIN rail mount sockets when
mounted on 35-mm wide DIN rails. The spacers
snap on and off the rail like sockets.
Type No.
Package Quantity
Color
SA-406B
1
Black
(04/10/25)
Spacer
SA-406B
53
Relay Sockets
Surface Mounting of DIN Rail Mount Socket
• End Spacer
Collective Mounting
Single Mounting
Type No.
SA-203B
For saving the need for screw tightening and drilling
Package Quantity Color
1
Black
• Intermediate Spacer
Type No.
SA-204B
Package Quantity Color
1
Black
SA-203B
SA-204B
SA-203B
The end spacer and intermediate spacer are used
for mounting DIN rail mount sockets on panel surfaces. In collective mounting using these spacers,
screws can be eliminated at every other socket.
Mounting centers are the same in single mounting
and collective mounting.
M4 Screw
Plain Washer
18 mm
Note: DIN rail mount sockets can also mount directly on panel
surfaces without using these spacers, then the mounting
centers are different from when using spacers.
Hold-down Spring
5 mm
ø4.2 Mounting Holes
or M4 Tapped Holes
A
A
A
Socket
A (mm)
SR3B-05A
SH1B-05A
SH2B-05A
SH3B-05A
SH4B-05A
SM2S-05A
SY2S-05A
SY4S-05A
44
21
31
41
51
31
21
31
Collective Mounting of Panel Mount Sockets
The SY, SM, and SH series panel mount sockets
are designed to mount in panel cut-outs collectively. These sockets can be mounted in the same
panel cut-out due to the standardized size.
• Mounting into Panel Cut-out
To mount, insert the sockets with mounting springs
facing top and bottom edges of the panel cut-out.
Push the mounting spring using a screwdriver until
the mounting spring clicks into the panel.
A (Total width of the sockets mounted)
W = A – 5.6 +0
–0.5
SY2S-51
SY4S-51
SY4S-51
SM2S-51
SY2S-51
SH1B-51
SH1B-51
SH2B-51
SY4S-51
Panel cut-out width W = 18 + 27 + 27 + 18 + 27 + 18 + 18 + 27 + 27 – 5.6
+0
= 201.4 –0.5
Push
Panel
• Socket Width
Spring
54
Socket
Width
SH1B-51
18 mm
SH2B-51
27 mm
SH3B-51
36 mm
SH4B-51
45 mm
SM2S-51
27 mm
SY2S-51
18 mm
SY4S-51
27 mm
(04/10/25)
Relay Sockets
SU Series Sockets: General Instructions
Parts Description
For photos and dimensions, see page 48.
Wiring Instructions
Wire Port for Terminal No. 10
COM
Terminals
Wire Ports
NO
Terminals
Wire Ports
NC
Terminals
Wire Ports
Two wire ports are
provided for each terminal.
Screwdriver Ports
Wire Port
Screwdriver Ports
➀
➁
➄
➅
➂
Screwdriver Ports
Clamp
Correct Incorrect
Direction of Screwdriver Tip
Wire Ports
Coil
Terminals
Wire Port for
Terminal No. 9
Screwdriver Port
Screwdriver Ports
➃
1. Insert the optional screwdriver (BC1S-SD0) or an applicable screwdriver into the square-shaped port as shown, until the screw-driver tip
touches the bottom of
the spring.
Marking Plate
➀ ➁ ➄ ➅ : Spring slots for SFA-101 leaf springs
➁ ➂ ➃ ➄ : Spring slots for SFA-202 leaf springs
Applicable Wires
Wire
Size
mm2
Stranded Wire
0.2 to 1.25
Solid Wire
0.2 to 1.5 mm2 or AWG24 to16
or AWG24 to16
Wire Insulation Diameter
ø3.15 mm maximum
• Strip the wire insulation 9 to 10 mm from the end.
9 to 10 mm
2. Push in the screwdriver until it touches the bottom of the
port. The wire port is now open, and the screwdriver is
held in place. The
screwdriver will not
come off even if you
release your hand.
3. While the screwdriver is retained in the port, insert the wire
or ferrule into the round-shaped wire port. Each wire port
can accommodate one wire or ferrule. When connecting
two wires to one terminal, use the adjoining port of the same
terminal.
• In applications using ferrules for stranded wires, choose
the ferrule listed in the table below. Make sure that an insulation sheath is applied when using the ferrules. When
using stranded wires without ferrules, make sure that the
core wires have not been loosened.
4. Pull out the screwdriver. The connection is now complete.
Applicable Ferrules
• When using thin wires with insulation diameter of ø1.6 mm
or less, do not insert the wire too deeply where the insulation inserts into the spring clamp opening. Make sure that
the wire insulation is stripped 9 to 10 mm and the wire is
inserted to the bottom.
Applicable Wire
(stranded)
Type No.
mm2
AWG
0.25
24
AI 0.25-12BU
—
22
AI 0.34-8TQ
0.5
20
AI 0.5-8WH
Manufacturer
Wire Port Bottom
Phoenix Contact
AI 0.5-10WH
Incorrect
Applicable Screwdriver
• For wiring, use the optional screwdriver (BC1S-SD0) or the
following applicable screwdriver.
Correct
• Do not twist the screwdriver
inserted into the screwdriver
port in the socket, otherwise
the socket may break.
All dimensions in mm.
(04/10/25)
55
Relay Sockets
Marking Plate
Write markings on the SU sockets using an oil-based marker,
or glue printed mylar on the marking surface. The size of the
printed mylar can be 8 × 9 mm maximum.
• Installing the SU9Z-J5 Jumper on Two, Three, or Four
SU Sockets
As shown below, slide the jumper in the sheath so that the
jumper aligns with the center of the sheath.
Sheath
Marking Surface
8.0
9.0
8.0
Marking Plate
Maximum Size of
Printed Mylar
Position of Printed Mylar
on the Marking Surface
• Installing the Marking Plate
Because of its removable structure, the marking plate may
have fallen from the socket or become loose in delivery.
Make sure that the marking plate is securely installed before
starting operation. The marking plate protects the conductive
portion of the socket, located under the marking plate, by
preventing metal fragments or pieces of wire from dropping
inside. Should any such fragments enter the socket, they
may cause fire hazard, damage, or malfunction.
Marking Plate
No Marking Plate
Loose Fit
Installed Securely
Jumper off Center
With the sheath properly installed on the jumper, cut the
sheath and jumper at the points shown below, using cutting
pliers. Referring to the drawing on the below right, make sure
that the sheath and jumper are cut within the cutting area.
Dispose of unused portions according to local waste disposal requirements.
Y
Rated Current
Material
Conductor
Sheath
3A
Nickel-plated brass
ABS resin
Sheath
Jumper
Sheath
Z
X
Cutting Area C
A
B
Cutting Area D
Cutting Area in Detail
CD
For Connecting Jumper Quantity
2 sockets
2
2 sockets
1
3 sockets
1
4 sockets
1
Cutting Area
A, C
Discard
Y
A, B
X
D
Z
After cutting the jumper and sheath, slide the jumper as
shown below, so that the ends of the jumper are not exposed.
Cut Surface
SU9Z-J5 Jumper for SU2S-11L and SU4S-11L
The SU9Z-J5 is used to install five sockets. When installing
less than five sockets, cut the jumper according to the instructions described below.
The SU9Z-J5 is for coil terminals only.
• SU9Z-J5 Jumper Specifications
Jumper on Center
Jumper
• Jumper Wiring to Six or More SU Sockets
To jumper wire six or more SU sockets, connect five sockets
using whole jumpers and the remaining sockets using a cut
jumper. Then connect the two terminals on adjoining sockets
using an applicable wire (see table below).
Proper Wire
• Installing the SU9Z-J5 Jumper
Loosen the marking plate on the socket.
Making sure that the SU9Z-J5 jumper is correctly aligned, insert the blades into the ports in the groove of the SU socket.
Jumper Port
for Terminal 13
Jumper Port
for Terminal 14
Blade
Jumper Groove
Correct
Jumper
Jumper Wiring of Terminal 14 between Adjoining Sockets
Wire
Stranded Wire
Size
0.2 to 1.25 mm2
Solid Wire
AWG
0.2 to 1.5 mm2
24 to 16
Note 1: Use a wire with cable insulation diameter of ø3.15 mm maximum.
Note 2: Strip the cable insulation 9 to 10 mm from the end.
Incorrect
Safety Precautions
Insertion Direction
Press down the marking plate to
secure the jumper. The jumper
installation is now complete.
56
Turn off the power to the SU9Z-J5 jumper before starting installation, removal, wiring, maintenance, or inspection of the
jumper, failure to turn power off may cause an electrical
shock or fire hazard.
To avoid a short circuit due to incorrect wiring, confirm which
terminals are connected to the jumper before starting wiring.
(04/10/25)
Relay Sockets
Optional Function Modules
Module
Type No.
SU9Z-D11
Ordering Type No.
LED Module
Polarity
A1: Negative
A2: Positive
SU9Z-D11PN10
Diode Module
RC Module
Rated Voltage
6 to 220V DC
SU9Z-D12
SU9Z-D12PN10
SU9Z-R21
SU9Z-R21PN10
A1: Positive
A2: Negative
6 to 240V AC
Package
Quantity
Function
For absorbing surge voltages in DC
coils.
Since the diode module has polarity,
connect DC voltage to terminals A1
and A2 correctly, otherwise the relay
does not operate.
For absorbing surge voltages in AC
coils.
—
10
10
10
SU9Z-L31
SU9Z-L31PN10
6 to 12V AC/DC
10
SU9Z-L32
SU9Z-L32PN10
24 to 48V AC/DC
10
SU9Z-L33
SU9Z-L33PN10
100 to 120V AC/DC
SU9Z-L34
SU9Z-L34PN10
200 to 240V AC/DC
Non-polarized
LED
Non-polarized LED indicator; goes
on when the relay coil is energized.
10
10
The diode module and RC module are for absorbing the counter emf generated in the relay coil. If the relay coil is subjected
to excessive external surge voltages, provide a separate surge protection device to prevent damage to the internal surge absorbing element. Do not disassemble the function module, otherwise the module may be damaged.
• Installing the Optional Function Module
Turn power off to the SU socket before starting installation, removal, wiring, maintenance, and inspection. Otherwise the devices may be damaged or electrical shocks may occur.
➀ Remove the marking plate from the socket.
IdecZ-L31
SU9 AC/DC
6-12V
A2
A1
➂ With the marking surface outside, insert the
module to the bottom.
Rib Guide
(Two Sides)
SU9Z-J5 Jumper
➁ When using the SU9Z-J5 jumper, insert the jumper
before installing the module.
(04/10/25)
Correct
Without Gap
Rib
(Two Sides)
Loose Fit
Incorrect
Insertion Complete
57
Relay Sockets
58
(04/10/25)
Specifications and other descriptions in this leaflet are subject to change without notice.
7-31, Nishi-Miyahara 1-Chome, Yodogawa-ku, Osaka 532-8550, Japan
Tel: +81-6-6398-2571, Fax: +81-6-6392-9731
www.idec.com
IDEC CORPORATION (USA)
IDEC IZUMI ASIA PTE. LTD.
1175 Elko Drive, Sunnyvale, CA 94089-2209, USA
Tel: +1-408-747-0550, Toll Free: (800) 262-IDEC, Fax: +1-408-744-9055
E-mail: opencontact@idec.com, www.idec.com
No. 31, Tannery Lane #05-01, Dragon Land Building, Singapore 347788
Tel: +65-6746-1155, Fax: +65-6844-5995
E-mail: generalinfo@idecasia.com.sg
IDEC CANADA LIMITED
IDEC IZUMI (H.K.) CO., LTD.
Unit 22-151, Brunel Road Mississauga, Ontario, L4Z 1X3, Canada
Tel: +1-905-890-8561, Toll Free: (888) 317-4332, Fax: +1-905-890-8562
Room 1409, Tower 1, Silvercord, 30 Canton Road, Tsimshatsui, Kowloon,
Hong Kong
Tel: +852-2-376-2823, Fax: +852-2-376-0790
E-mail: idec@idechk.com
IDEC ELECTRONICS LIMITED
Unit 2, Beechwood, Chineham Business Park, Basingstoke, Hampshire
RG24 8WA, UK
Tel: +44-1256-321000, Fax: +44-1256-327755
E-mail: idec@uk.idec.com
IDEC ELEKTROTECHNIK GmbH
Wendenstraße 331, D-20537 Hamburg, Germany
Tel: +49-40-25 30 54-0, Fax: +49-40-25 30 54-24
E-mail: service@idec.de, www.idec.de
IDEC AUSTRALIA PTY. LTD.
2/3 Macro Court, Rowville, Victoria 3178, Australia
Toll Free: 1-800-68-4332, Fax: +61-3-9763-3255
E-mail: sales@au.idec.com
IDEC IZUMI (Shanghai) Co., Ltd.
Room E, 15F, Majesty Building, No. 138 Pudong Avenue,
Shanghai 200120, P.R.C.
Tel: +86-21-5887-9181, Fax: +86-21-5887-8930
E-mail: idec@cn.idec.com
IDEC TAIWAN CORPORATION
8F, No. 79, Hsin Tai Wu Road, Sec. 1, Hsi-Chih, Taipei County, Taiwan
Tel: +886-2-2698-3929, Fax: +886-2-2698-3931
E-mail: service@idectwn.com.tw
Cat. No. EP1061-0-0 OCTOBER 2004 PRINTED IN JAPAN
(04/10/25)
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