285
285
Mildly Activated Rosin Cored Wire
Mildly Activated Rosin Cored Wire
For Lead-bearing and Lead-free alloys
For Lead-bearing and Lead-free alloys
Product Description Reliability Properties
Copper Mirror Corrosion: Low
Kester 285 mildly activated rosin flux is classified
Tested to J-STD-004, IPC-TM-650, Method 2.3.32
as Type ROL0 flux under IPC J-STD-004. This
flux was formerly classified as Type RMA per
Corrosion Test: Low
QQ-S-571. Kester 285 consists of high quality,
Tested to J-STD-004, IPC-TM-650, Method 2.6.15
purified rosin to which a synergistic combination of
activating agents has been incorporated. The
Silver Chromate: Pass
fluxing ability of 285 is much greater than ordinary
Tested to J-STD-004, IPC-TM-650, Method 2.3.33
mildly activated rosin fluxes and is comparable to
Chloride and Bromides: None Detected
fully activated rosin fluxes. Kester 285 has been
Tested to J-STD-004, IPC-TM-650, Method 2.3.35
developed for use in the electronic industry where
difficult assemblies are to be soldered, but process
Fluorides by Spot Test: Pass
requirements stipulate use of a mildly activated
Tested to J-STD-004, IPC-TM-650, Method 2.3.35.1
rosin flux.
SIR, IPC (typical): Pass
Tested to J-STD-004, IPC-TM-650, Method 2.6.3.3
Performance Characteristics:
Industry standard RMA cored wire
Blank 285
Compatible with leaded and lead-free alloys 10 9
Day 1 1.0 10 W 3.2 10 W
Classified as ROL0 per J-STD-004
9 9
Day 4 9.5 10 W 7.7 10 W
9 9
Day 7 8.3 10 W 7.0 10 W
RoHS Compliance
This product meets the requirements of the RoHS
Spread Test (typical):
(Restriction of Hazardous Substances) Directive,
Tested to J-STD-004, IPC-TM-650, Method 2.4.46
2002/95/EC Article 4 for the stated banned
2 2
Area of Spread mm (in )
substances. (Applies only if this core flux is
Flux Core Solder Cu Ni
combined with a lead free alloy)
285 Mildly Activated Rosin 335 (0.52) 140 (0.22)
282 Mildly Activated Rosin 240 (0.37) 100 (0.16)
44 Fully Activated Rosin 280 (0.43) 160 (0.25)285
Application Notes
Availability:
Kester 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 the alloy temperature chart in Kesters 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). AStandard Wire Diameter chart is included in
Kesters product catalog. The amount of flux in the wire dictates the ease of soldering for an application.
For most applications, core 66 (3.3% flux by weight) is recommended. Other core sizes, 50 and 58, (1.1%
and 2.2% respectively) are available. Kester 285 is packaged on spools of different sizes to accommodate
a variety of applications.
Process Considerations:
Solder iron tip temperatures are most commonly between 315-371C (600-700F) for Sn63Pb37 and
Sn62Pb36Ag02 alloys and 371-427C (700-800F) for lead-free alloys. Heat both the land area and component
lead to be soldered with the iron prior to adding Kester 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 and 186-18 Mildly Activated Rosin Flux are also available in Flux-Pens for optimum board clean-
liness.
Cleaning:
Kester 285 flux residues 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, Illinois, 60143 USA
Phone: (+1) 630-616-4000 Email: customerservice@kester.com Website: www.kester.com
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500 Chai Chee Lane Zum Plom 5 20-11 Yokokawa 2-Chome
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Sumida-Ku
(+65) 6449-1133 Germany
Tokyo 130-0003 Japan
customerservice@kester.com.sg (+49) 3741 4233-0
(+81) 3-3624-5351
customerservice@kester-eu.com jpsales@kester.com.sg
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: 26Mar10