Kester 44 Rosin Core Solder 63/37 .020″ 1 lb Spool – Premium Solder for Electronics & PCB Repair
The Kester 24-6337-0010 is a premium-grade, 63/37 tin-lead rosin core solder wire, renowned for its reliability in electronics manufacturing, assembly, and repair. This 1 lb spool features an ultra-fine .020″ (0.5mm) diameter, making it the ideal choice for detailed work on modern printed circuit boards (PCBs), surface-mount technology (SMT), and intricate soldering joints where precision is critical. The 63/37 eutectic alloy formulation has a distinct advantage: it transitions directly from liquid to solid at 361°F (183°C), eliminating a plastic or ‘pasty’ phase. This results in reliable, consistent solder joints with a smooth, shiny finish and dramatically reduces the risk of cold solder joints or defects.
The solder wire contains a mildly activated rosin (RMA) flux core (Type 44), which provides excellent wetting action, cleans oxidation from component leads and pads, and promotes strong metallurgical bonds. The flux residue is non-corrosive, non-conductive, and typically requires no cleaning for most applications, streamlining your workflow. This Kester solder is a trusted standard for professionals and hobbyists in electronics repair, prototyping, guitar electronics, automotive wiring, and aerospace applications.
Key benefits include superior electrical conductivity, excellent mechanical strength, and ease of use. The 1 lb spool offers substantial value for frequent users, while the fine gauge ensures minimal waste and precise control over solder deposition. For anyone seeking a high-quality, no-clean solder that delivers perfect results on everything from through-hole components to fine-pitch ICs, the Kester 44 Rosin Core Solder 63/37 is an industry-proven essential for your toolkit.
