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Hand soldering Pb-Free RoHS


Chris Carlen

Jan 1, 1970

I'm shopping for lead-free wire solders again for testing purposes. I
found Kester 48 in 2005 to be the most easy to use SAC305 wire solder
for hand-soldering.

It is also cored with RA, which is somewhat rare in Pb-free wires. Most
Pb-free wires are being done in no-clean or water-soluble (WS). Kester
is the only one with an RA SAC305 wire stocked by distributors.

It would seem WS is not very useful for many hand soldering tasks, since
you can't always submerge the sort of assemblies that require
hand-soldering. Picture transformers with solder lugs here.

The no-cleans are rather meek on wetting action, and only Kester 48
comes even close to the wetting of a typical SnPb fluxed solder. For
those of you who haven't tried it, get some Kester 48 to tinker. It's
great for tinning stranded wires since the SAC305 is less susceptable to
fatigue than SnPb when tightened in a screw terminal, for instance.

What are folks using to hand-solder stuff in the RoHS land? How's it going?

Good day!

Christopher R. Carlen
Principal Laser&Electronics Technologist
Sandia National Laboratories CA USA
[email protected]
NOTE, delete texts: "RemoveThis" and
"BOGUS" from email address to reply.

Rene Tschaggelar

Jan 1, 1970
Chris said:
What are folks using to hand-solder stuff in the RoHS land? How's it

Chris, I'm using
1) Stannol HF32, 0.5mm, Sn95.5 Ag3.8 Cu0.7, 3.5% flux
12) Stannol HF32, 1.0mm, Sn95.5 Ag3.8 Cu0.7, 3.5% flux
3) Stannol HS10, 1.0mm, Sn95.5 Ag3.8 Cu0.7, 1.5% flux

and all are reasonable.