Kester Wire Solder, Sn63/Pb37, # 331 Water-Soluble Flux, 1-lb. Roll
Donwload Data Sheet
Kester Formula #331 is a high-activity, water soluble core flux for soldering difficult metals on printed circuit boards. It exhibits the same fast action and mild properties as Kester's popular 2331-ZX neutral organic water soluble liquid flux. The flux is more heat stable than most organic fluxes, resulting in minimal smoke and odor. Its residue can be completely removed with a simple water rinse.
  • Sn63Pb43 Alloy
  • .015" and 0.031" Wire Diameters
  • #331 Water Soluble Flux
  • #66 Flux Core Size
Money blue $40.00
Clock fast Lead Time: In stock and ready for shipment
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Kester Wire Solder, Sn63/Pb37, # 245 No-Clean Flux, 1-lb. Roll
Kester 245 No-clean Cored Wire was developed to complement low residue liquid fluxes being used by the electronics industry. The chemistry is based on some of the same principles that have been safely used for years in mildly activated rosin fluxes.
Money blue $43.86
Clock fast Lead Time: 3 Days
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Kester Wire Solder, Sn96.5/Ag3.0/Cu0.5, # 331 Water-Soluble Flux, 1-lb. Roll
Donwload Data Sheet

This is a lead-free, water soluble cored wire solder. It has a SAC305 lead-free alloy, #331 water soluble flux, and #66 flux core size. Kester's SAC305 lead-free wire solder is comprised of 96.5% Tin, 3.0% Silver, and 0.5% Copper (Sn96.5/Ag3.0/Cu0.5) with a melting temperature range of 422°F to 428°F. Kester lead-free wire solders have been tested and proved to give good contact angles and shiny joints. Kester Formula #331 is a high-activity, water soluble core flux for soldering difficult metals. It exhibits the same fast action and mild properties as Kester's popular 2331-ZX neutral organic water soluble liquid flux. The flux is more heat stable than most organic fluxes, resulting in minimal smoke and odor. Its residue can be completely removed with a simple water rinse. Kester #331 is classified as ORH1 per J-STD-004.

  • SAC305 (Sn96.5/Ag3.0/Cu0.5) Lead-Free Alloy
  • .015" and 0.31" Wire Diameters
  • #331 Water Soluble Flux
  • #66 Flux Core Size
Money blue $75.00
Clock fast Lead Time: In stock and ready for shipment
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Kester Wire Solder, SN96.5Ag3.0Cu0.5, # 275 No-Clean Flux, 1-lb. Roll
Kester “275” No-Clean Flux for cored solder wire was developed to provide superior wetting performance for hand soldering in the electronics industry. The chemistry is based on some of the same principles that have been safely used for years in mildly activated rosin fluxes.
Money blue $76.70
Clock fast Lead Time: 3 Days
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