User manual | 370 078 kester 24 6337 8800 more info

CONNECTING INNOVATION
Product Description
Kester 245 No-clean Cored Wire was developed
to complement low residue liquid fluxes being used
by the electronics industry. The chemistry is
based on some of the same principles that have
been safely used for years in mildly activated rosin
fluxes. The use of 245 No-clean Cored Wire
results in visually acceptable assemblies without
cleaning, yet soldering quality and efficiency is
comparable to that obtained with mildly activated
rosin flux. Kester 245 was formerly classified as
Type LR per MIL-F-14256. Kester 245 is Bellcore
GR-78 compliant.
Performance Characteristics:
* Highly reliable post-soldering residue
* Minimal residue
* Compatible with leaded and lead-free alloys
* Classified as ROLO per J-STD-004
+ Compliant to Bellcore GR-78
RoHS Compliance
This product meets the requirements of the RoHS
(Restriction of Hazardous Substances) Directive,
2002/95/EC Article 4 for the stated banned
substances. (Applies only if this core flux is
combined with a lead free alloy)
NH 4397-8800
Reliability Properties
Copper Mirror Corrosion: Low
Tested to J-STD-004, IPC-TM-650, Method 2.3.32
Corrosion Test: Low
Tested to J-STD-004, IPC-TM-650, Method 2.6.15
Silver Chromate: Pass
Tested to J-STD-004, IPC-TM-650, Method 2.3.33
Chloride and Bromides: None Detected
Tested to J-STD-004, IPC-TM-650, Method 2.3.35
Fluorides by Spot Test: Pass
Tested to J-STD-004, IPC-TM-650, Method 2.3.35.1
SIR, IPC (typical): Pass
Tested to J-STD-004, IPC-TM-650, Method 2.6.3.3
Blank 245
Day 1 1.2 x10" Q 1.7 x 10° Q
Day 4 9.4 x 10° Q 1.9 х 10° ©
Day 7 8.6 x10° Q 21x 10% Q
Spread Test (typical):
Tested to J-STD-004, iPC-TM-650, Method 2.4.46
Area of Spread mm? (in?)
Flux Core Solder Sn63Pb37
Plastic Rosin Core 194 (0.30)
285 Mildly Activated Rosin 335 (0.52)
245 No-Clean 348 (0.54)
245
®
Application Notes
Availability:
Kester 245 is available in a wide variety of alloys, wire diameters and flux percentages. For most applications,
Sn63Pb37 is used. Consult the alloy temperature chart in Kester's product catalog for a comprehensive
alloy list. The standard wire diameter for most applications is 1.00mm (0.031in). Wire diameters range from
0.25 - 6.00mm (0.010 to 0.250in). A "Standard Wire Diameters" chart also is also included in Kester's
product catalog. The amount of flux in the wire dictates the ease of soldering for an application. For tin/lead
applications, core 50 or 58 (1.1 and 2.2% flux by weight) are recommended. Kester 245 is packaged on spools
of different sizes to accommodate a variety of applications.
Process Considerations:
Solder iron tip temperatures are most commonly between 315-371°C (600-700°F) for Sn63Pb37 and
Sn62Pb36Ag02 alloys. Heat both the land area and component lead to be soldered with the iron prior to
adding Kester 245 cored wire. Apply the solder wire to the land area or component lead. Do not apply the
wire directly to the soldering iron tip. If needed, Kester 951 or 952-D6 no clean flux may be used as a
compatible liquid flux to aid in reworking soldered joints. Kester 951 and 952-D6 are available in Flux-Pens®
for optimum board cleanliness.
Cleaning:
The flux residues left by the 245 core flux are non-corrosive, non-conductive and do not require removal in
most applications.
Storage, Handling, and Shelf Life;
Storage must be in a dry, non-corrosive environment. The surface may lose its shine and appear a dull
shade of grey. This is a surface phenomena and is not detrimental to product functionality. Flux cored solder
wire has a limited shelf life determined by the alloy used in the wire. For alloys containing > 70% lead, the
shelf life is two years from date of manufacture. Other alloys have a shelf life of three years from date of
manufacture.
Health & Safety:
This product, during handling or use, may be hazardous to health or the environment. Read the Material
Safety Data Sheet and warning label before using this product.
World Headquarters: 800 West Thorndale Avenue, Itasca, lllinois, 60143 USA
Phone: (+1) 847-297-1600 « Email: [email protected] « Website: www. kester.com
Asia Pacific Headquarters European Headquarters Japanese Headquarters
500 Chai Chee Lane Zum Plom 5 20-11 Yokokawa 2-Chome
Singapore 469024 08541 Neuensalz Sumida-Ku
(+65) 6449-1133 Germany Tokyo 130-0003 Japan
[email protected] (+49) 3741 4233-0 (+81) 3-3624-5351
[email protected] [email protected]
The data recommendations presented are based on tests, which we consider reliable. Because Kester has no control over the conditions of use, we disclaim any responsibility connected with the
use of any of our products or the information presented. We advise that all chemical products be used only by or under the direction of technically qualified personnel who are aware of the poten-
tial hazards involved and the necessity for reasonable care in their handling. The technical information contained herein is consistent with the properties of this material but should not be used in
the preparation of specifications as it is intended for reference only. For assistance in preparing specifications, please contact your local Kester office for details.
Rev. 15Jun07