Products

Flux Recommendations

Kester offers a wide variety of flux types with activity ranges from ORH1 for difficult to solder applications down to ROL0 for applications requiring low levels of halides. We offer internal and external flux types to create the optimal solution for your product needs. Please contact technical support for additional recommendations on which flux type and flux coating will work best for your application.

Flux	Description	Type	Class*	Internal	External
245S	Low Residues	NC	ROL0	X
291S	High Reliability Post Soldering Residue	NC	ORL0		X
290S	Extremely Low Residues	Low Solids	ROL0		X
285	Use for Difficult to Solder Applications	RMA	ROL0	X	X
48SF	High Activity RA Formulation with Excellent Wetting and Low Smoke and Odor	RA	ROL1	X
44	Recommended when Soldering to Highly Oxidized Copper or Difficult to Solder Applications	RA	ROM1	X	X
88	Highest Activity with ROM1 Type	RA	ROM1	X
435	High Activity Water Soluble Flux	WS	ORH1		X

*J-STD-004A

Preform Dimensional Offerings

Kester preforms can be processed in a wide range of dimensions. Please view the table below for our standard dimensional offerings and tolerances. If the required volume and dimensions of your preform are unknown please call your local Kester sales representative to assist you in the calculation of these values.

Ribbons

	Dimensions	Tolerance
W	.050" - 1.0" (1.27 - 25.4mm)	± .005" (.127mm)
t	.005" - .060" (.127 - 1.52mm)	± .002" (.050mm)

Cut-Offs

	Dimensions	Tolerance
W	.028" - .250" (.7112 - 6.3mm) > .250" (6.35mm)	± .003" (.076mm) ± .005" (.127mm)
L	.500" (12.7mm) >.500" (12.7mm)	± .003" (.076mm) ± .005" (.127mm)
t	.004" - .125" (.102 - 3.1mm)	± .002" (.050mm)

Washers

	Dimensions	Tolerance
OD	.030" - 1.0" (.762 - 25.4mm)	± .002" (.050mm)
ID	.015" - 0.93" (.381 - 23.6mm)	± .002" (.050mm)
t	.004" - 0.95" (.102 - 24.1mm)	± .002" (.050mm)

Discs

	Dimensions	Tolerance
D	.020" - .250" (.508 - 6.35mm)	± .002" (.050mm)
t	.004" - .012" (.102 - .305mm)	± .002" (.050mm)

Pellets

	Dimensions	Tolerance
d	.010" - .585" (.254 - 14.8mm)	± .003" (.076mm)
L	2" (50.8mm)	± .003" (.076mm)
	2 - 6" (50.8 - 152.4mm)	± .010" (.254mm)
	6 - 10" (152 - 2520mm)	± .020" (.508mm)

Stampings

As stampings require customized tooling please contact your local sales representative today to discuss your product needs.

Preform Alloys

Preferred Lead-Free Alloys

Sn96.5Ag3.0Cu0.5

Sn95.5Ag3.8Cu0.7

Sn97Ag0.2Sn0.8Cu2

Sn96.3Ag3.7

Preferred Leaded Alloys

Sn63Pb37

Sn10Pb88Ag2

Sn62Pb36Ag2

Sn60Pb40

Other alloys may be available, depending on melt point required.