MECHANIC Solder Wire 0.3mm Sn63-Pb37

The MECHANIC 0.3mm solder wire is a fine-gauge wire built for work that demands high control and precision — such as soldering small SMD components, mobile phone chips, and densely packed boards. Its thin diameter lets you dispense solder with precision, avoiding excess buildup or accidental contact with neighboring components.

Its formula is Sn63/Pb37 alloy (63% tin, 37% lead), a eutectic alloy that transitions directly from liquid to solid, giving clean, stable joints on the first pass. The wire contains a built-in CJ flux at a precise 0.05% ratio, with a 75% expansion rate that helps the flux activate properly during heating for strong adhesion. Total flux content in the wire ranges between 1.0% and 3.0%, balancing cleaning power with solder adhesion without leaving excess residue.

Suited for professional technicians working on mobile phone and computer motherboard repair, and any SMD work requiring high precision and a thin wire gauge.

Technical Specifications:

• Diameter: 0.3mm
• Alloy: Sn63/Pb37 (63% Tin / 37% Lead)
• Flux Ratio (CJ): 0.05%
• Expansion Rate: 75%
• Total Flux Content: 1.0% - 3.0%
• Weight: 40g