Sn60Pb40 T4 solder powder

The Sn60Pb40 T4 solder powder is a classic tin-lead alloy with 60 % Tin and 40 % Lead. With a melting range of approx. 183-190 °C, it offers proven properties for a wide range of soldering processes. The T4 grit (20-38 µm) ensures even finer paste deposition and is therefore particularly suitable for fine-pitch layouts and complex SMT applications.

Properties and advantages

• Proven alloy: Standardised in electronics and electrical engineering for decades.
• Fine T4 grit: Greater precision in stencil printing and reflow compared to T3.
• Stable flow properties: Homogeneous, even solder joints, even in complex assemblies.
• Constant melting range: Approx. 183-190 °C for reproducible results.
• Process reliability: Ideal for automated SMT processes with finer structures.

Areas of application

Fine-Pitch & SMT

The fine grain makes Sn60Pb40 T4 suitable for Fine-pitch PCB layouts and precise SMT and reflow processes in the Semiconductor Technology & Electronics.

Electrical engineering

In the Electrical engineering Sn60Pb40 T4 is used for connectors, cable assemblies and more sensitive assemblies that benefit from the more precise T4 grain.

Hard & soft soldering

Also in the Hard & soft soldering Sn60Pb40 T4 is suitable for stable connections at moderate temperatures.

Automotive industry

In the Automotive industry this alloy is used when classic tin-lead solders with a fine grain size are required, for example for control units and cable assemblies.

Technical properties

• Composition: Sn 60 %, Pb 40 %
• Melting range: approx. 183-190 °C
• Grain size: T4 (20-38 µm)
• Particle morphology: Spherical for uniform paste rheology
• Purity: High quality, controlled oxidation

Sustainability & regulation

Sn60Pb40 is a leaded solder and does not fall under the RoHS requirements for lead-free electronics. It is specifically used in Special applications where the advantages of tin-lead technology continue to be appreciated. NMD only supplies this powder for authorised applications.

Conclusion

Sn60Pb40 T4 solder powder is the finer-grained version of the tried-and-tested standard solder. With stable melting properties, good wetting and T4 grain size, it offers maximum precision for fine-pitch, SMT and demanding applications. Further fields of application can be found in the Semiconductor Technology & Electronics and in the Electrical engineering.