®
Technical Data Sheet
285 Flux-Cored Wire
Product Description
Mildly Activated Rosin Cored Wire for Leaded and Lead-free Alloys
Kester 285 mildly activated rosin flux is classified as Type ROL0 flux under IPC J-STD-004. This flux was formerly
classified as Type RMA per QQ-S-571. 285 consists of high quality, purified rosin to which a synergistic combination of
activating agents has been incorporated. The fluxing ability of 285 is much greater than ordinary mildly activated rosin
fluxes and is comparable to fully activated rosin fluxes. 285 has been developed for use in the electronic industry where
difficult assemblies are to be soldered, but process requirements stipulate use of a mildly activated rosin flux.
Performance Characteristics:
■
Industry standard RMA cored wire
■
Compatible with leaded and
lead-free alloys
■
Classified as ROL0 per J-STD-004
RoHS Compliance
This product meets the requirements of the Restriction of Hazardous Substances (RoHS) Directive, 2011/65/EU for the
stated banned substances. (Applies only if this core flux is combined with a lead-free alloy)
Reliability Properties
Copper Mirror Corrosion:
Low
2.3.32
Tested to J-STD-004, IPC-TM-650, Method
Fluorides by Spot Test:
Pass
Spread Test (typical):
Pass
Tested to J-STD-004, IPC-TM-650, Method
2.3.35.1
Tested to J-STD-004, IPC-TM-650, Method
2.4.46
Area of Spread mm
2
(in
2
)
Flux Core Solder
285
282
44
Cu
335 (0.52)
240 (0.37)
280 (0.43)
Ni
140 (0.22)
100 (0.16)
160 (0.25)
Corrosion Test:
Low
SIR, IPC (typical):
Pass
Blank
Day 1
Day 4
Day 7
1.0*10
10
Ω
9.5*10
9
Ω
8.3*10
9
Ω
Tested to J-STD-004, IPC-TM-650, Method
2.6.15
Tested to J-STD-004, IPC-TM-650, Method
2.6.3.3
Silver Chromate:
Pass
285
3.2*10
9
Ω
7.7*10
9
Ω
7.0*10
9
Ω
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
Global Headquarters: 800 West Thorndale Avenue, Itasca, IL USA 60143
■
Phone: +1 800.2.KESTER
■
Fax: +1 630.616.4044
Asia-Pacific Headquarters: 61 Ubi Avenue 1 #06-01 UB Point, Singapore 408941
■
Phone: +65 6.449.1133
■
Fax: +65 6.242.9036
European Headquarters: Ganghofer Strasse 45, 82216 Gernlinden, Germany
■
Phone: +49 (0) 8142 4785 0
■
Fax: +49 (0) 8142 4785 61
Asia Manufacturing: Hengqiao Road, Wujiang Economic Development Zone
■
Suzhou, Jiangsu Province, China 215200
■
Phone: +86 512.82060807
■
Fax: +86 512.8206 0808
■
Website: www.kester.com
■
Application Notes
Availability
®
285 is available in a wide variety of alloys, wire diameters and flux percentages. For most applications, Sn63Pb37 or
Sn96.5Ag3.0Cu0.5 is used. Consult Kester’s website for the comprehensive alloy list and for standard wire diameters. The
standard wire diameter for most applications is 0.8mm (0.031”). Wire diameters range from 0.25-6.00mm (0.010-0.250in).
The amount of flux in the wire dictates the ease of soldering for an application. 285 is packaged on spools of different
sizes to accommodate a variety of applications.
Note: Core Size 50, 58 and 66 = 1.1%, 2.2% and 3.3% flux core.
Process Considerations
Solder iron tip temperatures are most commonly between 315-371°C (600-700°F) for Sn63Pb37 and Sn62Pb36Ag02
alloys and 371-427°C (700-800°F) for lead-free alloys. Heat both the land area and component lead to be soldered
with the iron prior to adding 285 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 186 and 186-18 Mildly Activated Rosin Flux may be used as a
compatible liquid flux to aid in reworking soldered joints. Kester 186 Mildly Activated Rosin Flux is also available as a
Flux-Pen
®
for optimum board cleanliness.
Cleaning
285 flux residues are non-corrosive, non-conductive and do not require removal in most applications.
Storage and Warranty Period
Storage must be in a dry, non-corrosive environment between 10-40°C (50-104°F). The surface may lose its shine and
appear a dull shade of grey. This is a surface phenomenon and is not detrimental to product functionality. Flux-cored
solder wire has a limited warranty period determined by the alloy used in the wire. For alloys containing more than 70%
lead, the warranty period is 2 years from the date of manufacture. Other alloys have a warranty period of 3 years from the
date of manufacture.
Health and Safety
This product, during handling or use, may be hazardous to your health or the environment. Read the Safety Data Sheet
(SDS) and warning label before using this product.
Global Headquarters: 800 West Thorndale Avenue, Itasca, IL USA 60143
■
Phone: +1 800.2.KESTER
■
Fax: +1 630.616.4044
Asia-Pacific Headquarters: 61 Ubi Avenue 1 #06-01 UB Point, Singapore 408941
■
Phone: +65 6.449.1133
■
Fax: +65 6.242.9036
European Headquarters: Ganghofer Strasse 45, 82216 Gernlinden, Germany
■
Phone: +49 (0) 8142 4785 0
■
Fax: +49 (0) 8142 4785 61
Asia Manufacturing: Hengqiao Road, Wujiang Economic Development Zone
■
Suzhou, Jiangsu Province, China 215200
■
Phone: +86 512.82060807
■
Fax: +86 512.8206 0808
■
Website: www.kester.com
■
