SAC405 T3 soldering powder

SAC405 T3 soldering powder is a proven SAC alloy with 95.5 % Tin, 4 % Silver and 0.5 % Copper. The higher silver content compared to SAC305 improves the Wettability and the Strength of the solder joints. With a melting range of approx. 217-220 °C, the alloy is suitable for Sophisticated SMT and reflow processes. The T3 grit (25-45 µm) ensures clean stencil prints and stable paste rheology.

Properties and advantages

• Increased silver content (4 %): Improves wettability, electrical conductivity and solder joint strength.
• T3 grit: Ideal for standard SMT processes with reproducible paste quality.
• Thermal stability: High resistance to temperature cycles and mechanical stress.
• Very good wetting: Homogeneous, durable solder joints even with complex layouts.
• Lead-free & RoHS compliant: Sustainable alternative to classic tin-lead solders.

Areas of application

SMT and reflow processes

SAC405 T3 is often used in the Semiconductor Technology & Electronics used. The increased silver content results in stable solder joints with improved wetting in SMT and reflow applications.

Fine-Pitch & BGA

The T3 grit is suitable for Fine-pitch printed circuit boards and BGA and µBGA componentsthat require robust connections.

Automotive industry & electrical engineering

In the Automotive industry and Electrical engineering SAC405 is used when assemblies have to withstand high thermal loads.

Hard & soft soldering

Also for lead-free Hard & soft soldering processes SAC405 is suitable when stable and precise results are required.

Technical properties

• Composition: Sn 95.5 %, Ag 4 %, Cu 0.5 %
• Melting range: approx. 217-220 °C
• Grain size: T3 (25-45 µm)
• Particle morphology: Spherical for even paste distribution
• Purity: High quality, controlled oxidation

Sustainability & regulation

As Lead-free solder SAC405 fulfils the RoHS specifications and is established in many industries. Thanks to the combination of a higher silver content and T3 grain size, it offers long-lasting, environmentally friendly solder joints.

Conclusion

SAC405 T3 soldering powder is the ideal choice for applications that benefit from improved wetting and increased stability. With 4 % silver content, lead-free composition and T3 grain size, it is a reliable standard solder for modern electronics. Further fields of application can be found in the Semiconductor Technology & Electronics and in the Hard & soft soldering.