ALPHA® Telecore XL-825
ALPHA® TELECORE PLUS
HALIDE-FREE, NO-CLEAN, CORED SOLDER WIRE
DESCRIPTION
ALPHA TELECORE PLUS is a low residue core solder designed for no-clean soldering applications that must
meet all appropriate Bellcore specifications. The unique blend of rosin and proprietary activators provide rapid
wetting while leaving minimal, optically clear, completely inert residue.
FEATURES & BENEFITS
ALPHA Telecore Plus is suitable for use in any commercial no-clean hand soldering application that must meet
Bellcore Specification TR-NWT-000078.
ALPHA Telecore Plus' activator system is effective in soldering to mildly oxidized surfaces of the following
metals:
Cadmium (Plate)
Copper
Gold
Silver
Solder (Plate)
Solder (Hot Dip)
Tin (Hot Dip)
Tin (Plate)
PRODUCT INFORMATION
Standard
Alloy Designation
Melting or Solidus /
Liquidus Temp °C
Flux Amount
217 - 228
2.2% & 3.3%
217 - 221
2.2%, 3.3%
®
Proprietary
SACX Plus 0307
J-STD-006B
Sn96.5Ag3.0Cu0.5
J-STD-006B
Sn96.5Ag3.5
221
2.2%, 3.3%
J-STD-006B
Sn99.3Cu0.7
227
2.2%, 3.3%
J-STD-006B
Sn63Pb37
183
1.1%, 2.2%
(SAC305)
J-STD-006B
Sn62Pb36Ag2
179
1.1%, 2.2%
* TELECORE PLUS may also be available in other or special alloys and flux amounts on request.
APPLICATION
A soldered joint is formed by heating the parts to be soldered to a temperature in excess of the melting
point of the alloy to be used – in hand soldering this is how a soldering iron is used. By feeding the
cored wire onto the parts, the flux is able to flow and remove oxidized metal, while the solder creates a
thin inter-metallic bond which becomes the solder joint.
Note the following tips:
 Use a soldering iron tip size and form to suit the operation: small tips for soldering large components may
prevent the formation of a joint or slow the process down.
 Select a solder wire diameter to suit both the soldering iron tip and the parts/components to be soldered.
 Soldering iron systems should provide sufficient heat to satisfy the requirements of the points above.
 A typical solder tip temperature would be between 120°C and 160°C above the liquidus temperature of the
alloy. The ideal temperature to use is dependant on how thermally demanding the assembly is.
 Cored solder wires can be provided in different grades of alloy so always ensures that you have selected the
right grade for the application.
SM #416-7
2014-10-01
an Alent plc Company
ALPHA Global Headquarters
300 Atrium Drive, Somerset, NJ 08873 USA  1-800-367-5460  www.alpha.alent.com
The information contained herein is based on data considered accurate and is offered at no charge. No warranty is expressed or implied regarding the accuracy of this data. Liability is
expressly disclaimed for any loss or injury arising out of the use of this information or the use of any materials designated.
ALPHA is a registered trademark of Alpha Metals, Inc.
© 2014 ALPHA
ALPHA® TELECORE PLUS
HALIDE-FREE, NO-CLEAN, CORED SOLDER WIRE
APPLICATION
 Do not overheat as this causes an increase in the depth of the inter-metallic layer, which in turn weakens the
joint.
If you choose to use a liquid rework flux, ALPHA NR205 Flux is recommended to provide the optimal
combination of high long-term reliability and low residue level. NR205 Flux is available in Alpha’s Write
Flux Pens for precision flux application.
TECHNICAL DATA
Physical Properties
Rosin Grade:
Rosin Softening Point:
Halide Content:
Classification:
Electrical Reliability Test
Surface Insulation
Bellcore Test (GR-78-CORE)
Electromigration
Bellcore Test (GR-78-CORE)
Water Extract Resistivity
(QQ-S-571F)
Chemical Reliability Test
Copper Mirror Test
(IPC-TM-650- 2.3.32)
Copper Corrosion Test
(IPC-TM-650-2.6.15)
Typical Values
WW per Fed Spec. LL-R-626
71ºC (160°F)
Passes Silver Chromate Paper Test
ROL0 per IPC J-STD-004
ISO 12224 – 1.1.2
Requirements
11
Results
1.0 × 10 Ω minimum
PASS
SIR(initial)/SIR (Final) < 10
PASS
40,000 ohm-cm,
typical
Requirements
No complete removal of
copper
No evidence of corrosion
Results
PASS
PASS
SAFETY
Observe standard precautions for handling and use. Use in well ventilated areas.
DO NOT SMOKE during use.
ALPHA TELECORE PLUS cored solder wire is not considered toxic. However, its use in typical soldering
applications will generate a small amount of decomposition and fumes. These fumes should be adequately
exhausted / vented for operator safety and comfort.
STORAGE
ALPHA Cored Solder Wires should be stored in dry conditions and within a temperature range of 10°C to 40°C.
When stored under these conditions the product shelf life is indefinite. However, Alpha guarantees the product
shelf life for three years from the date of manufacture when stored in dry conditions and within 10°C to 40°C.
SM #416-7
2014-10-01
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