Most industries switched to lead-free solder pastes when the RoHS Directive came into force in 2006. There are only a very few exceptions in which lead-containing solder pastes may be used. Exempt are, for example, safety-relevant components in the automotive, aviation, military, and medical engineering industries, where the safety of people has priority. There are suitable long-term tests for lead-containing solder joints that show that the requirements in these industries can be met.

As more and more applications use lead-free alloys, the production volumes of lead-containing solder pastes have been significantly reduced. We have adapted our range of lead-containing solder pastes so that we still have one type available in stock.

Advantages of lead-containing solder paste

  • High elasticity of the alloy
  • Low melting temperature range
  • Broad melting range (tombstoning is prevented)
  • Cost-efficient
  • Quick wetting
  • No whisker formation

Lead-containing or lead-free

Alloy Melting range (°C)

Tensile strength (MPa)

Ductility (%)

Wetting time (s)
Lead-Containing Sn62 Pb37,6 Ag0,4 (T6204) 179 - 190 54 23 0,8
Lead-Free Sn96,5 Ag3 Cu0,5 (NP303,SAC305) 217 - 221 37 31 1,58
Clear filters
Flux classification
Powder size

Alloy: Sn 62 / Pb 37,6 / Ag 0,4

Solder paste leaded - GENMA Europe GmbH

T6204-GM155-GQ COSMO

Our proven lead-containing standard solder paste


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