The RF4 RF-108A Solder Wire is a professional-grade, high-purity soldering consumable designed for precision electronics assembly and repair. This 100g spool features a 0.8mm diameter and a 63/37 tin-lead alloy (63% tin, 37% lead) with a 2% rosin flux core . The 0.8mm diameter provides an excellent balance for both small SMD pads and through-hole components , making it a versatile choice for repair labs, prototyping, and assembly lines.

This lead-based solder wire delivers excellent wettability, fast flow, and a low melting point, ensuring strong, reliable joints with minimal residue . The evenly wound spool allows for smooth feeding and easy preservation .

Key Features

• 63/37 Tin-Lead Alloy (Eutectic) – Provides a sharp melting point at 183°C with no plastic phase, significantly reducing the risk of cold joints and ensuring consistent, professional results .
• 2% Rosin Flux Core – Ensures clean, solid joints by removing oxidation during soldering while leaving minimal, non-corrosive residue .
• 0.8mm Diameter – Ideal for both fine-pitch SMD components and general through-hole soldering, striking the perfect balance for most electronics work .
• Excellent Wettability & Fast Flow – Superior spreading ability ensures strong metallurgical bonding on copper pads and component leads .
• Smooth, Oxidation-Resistant Joints – Produces bright, smooth solder joints that resist oxidation and heat fatigue over time .
• 100g Spool – Suitable for moderate use in repair labs, service centers, and assembly lines .
• Evenly Wound Spool – Ensures smooth feeding, prevents tangles, and allows for easy sorting and preservation .