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MG Chemicals Lead-Free solder SAC305 is an electronic grade, lead-free solder wire. It uses the predominant lead-free alloy composition. It is complemented with a no clean, synthetically refined, splatter-proof resin flux core. These solder wires meets J-STD-004 and exceeds J-STD-006 purity specifications. This solder is a great alternative to leaded solders. Mild enough to not require cleaning, it leaves a small amount of post-soldering residues that is non-conductive and non-corrosive and won’t cause electrical shorts. The name no clean refers to the fact that the flux residues are not harmful to assemblies and does not mean there will be no residues.

Catalog Number Sizes Available Diameter Gauge Flux Core % Description
4900-112G 1/4 lb (113 g) 0.032" 21 2.2 Pocket pack
4900-454G 1 lb (454 g) 0.032" 21 2.2 Spool
4900-35G 17 g (0.6 oz) 0.032" 21 2.2 Spool

* Also available in flux core percentages: 2% to 4%


  • Lead Free
  • Halide free
  • The resin spreads like rosin activated flux
  • No clean flux
  • Virtually non- splattering
  • Hard non-conductive residues
  • Exceeds J-STD-004B, J-STD-006C
  • RoHS compliant
  • Available Flux Core percentage: 2% to 4%
  • Melting Point: 217 °C - 221°C / 422 °F - 430 °F