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24-7068-1401

P1-P2
48 Activated Rosin Cored Wire for
Lead-Free and Leaded Alloys
Product Description
Kester 48 Activated Rosin Flux for cored solder wire was developed for lead-free applications to enable soldering of most
common metals. 48 has performance characteristics far exceeding standard RA uxes. 48 builds on the performance of
its predecessor Kester 44 with “instant-action” wetting to provide fast and reliable solder joints.
Technical Data Sheet
Reliability Properties
Copper Mirror Corrosion: Low
Tested to J-STD-004, IPC-TM-650, Method
2.3.32
Surface Insulation Resistance (SIR),
(typical): Pass
Tested to J-STD-004, IPC-TM-650, Method
2.6.3.3
Blank 48
Day 1 1.6*10
10
Ω 1.1*10
10
Ω
Day 4 1.2*10
10
Ω 9.2*10
9
Ω
Day 7 1.1*10
10
Ω 8.6*10
9
Ω
RoHS Compliance
Kester does not determine any applicable Restriction of Hazardous Substances (RoHS) exemptions for our lead
containing products at the user level. (Applies only if this core ux is combined with a lead-free alloy)
Silver Chromate: Fail
Tested to J-STD-004, IPC-TM-650, Method
2.3.33
Corrosion Test: Low
Tested to J-STD-004, IPC-TM-650, Method
2.6.15
Spread Test (typical):
Tested to J-STD-004, IPC-TM-650, Method
2.4.46
Fluorides by Spot Test: Pass
Tested to J-STD-004, IPC-TM-650, Method
2.3.35.1
Chloride and Bromides: 1.05%
Tested to J-STD-004, IPC-TM-650, Method
2.3.35
Performance Characteristics:
■ Unparalleled wetting performance
■ Excellent solderability and fast
wetting to a variety of surface n-
ishes
■ Eliminates the need and expense of
cleaning
■ Low spattering
■ Low smoke and odor
■ Classied as ROM1 per J-STD-004
Area of Spread mm
2
(in
2
)
Flux Core Solder Sn96.5Ag3.0Cu0.5 Sn63Pb37
285 Mildly Activated Rosin 213 (0.33) 335 (0.52)
275 No-Clean 219 (0.34) 361 (0.56)
44 Activated Rosin 220 (0.34) 342 (0.53)
48 Activated Rosin 245 (0.38) 419 (0.65)
Global Headquarters: 800 West Thorndale Avenue, Itasca, Illinois, 60143 USA
Phone: (+1) 630 616-4000 ■ Email: customerservice@kester.com ■ Website: www.kester.com
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.
Storage and Shelf Life
Storage must be in a dry, non-corrosive environment. The surface may lose its shine and appear a dull shade of gray.
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 more than 70% lead, the shelf life is two years from the
date of manufacture. Other alloys have a shelf life of three years from the date of manufacture.
Cleaning
48 possesses excellent uxing ability, the ux residue is non-corrosive and non-conductive under normal conditions of
use. When exposed to an elevated temperature and humidity environment (38°C, 94% RH) for 72 hours, there is no
evidence of corrosion caused by the ux residue. IPA will not clean the residues off the surface of the circuit board after
the soldering process. A saponier or cleaning agent specically designed to clean a rosin based ux is required to clean
the residues. Please contact Kester Technical Support for further information.
Application Notes
Availability
48 ux cored wire is available in a wide variety of alloys, wire diameters and ux percentages and roll sizes. The most
common alloys are Sn96.5Ag3.0Cu0.5 and K100LD. Please refer to www.kester.com for wire diameters, ux percentages
and roll sizes that are available.
Note: Core Size 50, 58 and 66 = 1.1, 2.2 and 3.3% ux core
Process Considerations
Solder iron tip temperatures are most commonly between 371-400°C (700-750°F) for lead-free alloys. Heat both the land
area and component lead to be soldered with the iron prior to apply the solder wire to the land area or component lead.
Do not apply the wire directly to the soldering iron tip. This will shorten the life of the solder tip. If needed, Kester 186 ux
may be used as a compatible liquid ux to aid in reworking soldered joints.
Global Headquarters: 800 West Thorndale Avenue, Itasca, Illinois, 60143 USA
Phone: (+1) 630 616-4000 ■ Email: customerservice@kester.com ■ Website: www.kester.com
P1-P2

24-7068-1401

Mfr. #:
Buy 24-7068-1401
Manufacturer:
Kester
Description:
Unclassified
Lifecycle:
New from this manufacturer.
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