Kester 24-6337-0018 1lb Rosin Activated RA Solder Wire 63/37 Sn/Pb

Overview

Kester 24-6337-0018 is a 1 lb spool of leaded solder wire built for electronics assembly and repair. It uses rosin-activated RA flux to help metals wet evenly, aiding consistent fillets and reliable joints. The alloy is 63/37 Sn/Pb, a classic balance of flow and strength that this size of wire supports with steady feeding and controlled application. The external diameter is 0.635 mm (0.025 in), a versatile gauge that feeds smoothly through common soldering irons and onto medium-density boards. The melting temperature is approximately 183 C, offering a practical heat window for quick work without excessive risk to nearby components. This product is not RoHS compliant, so consider regional requirements before use.

In real-world use, this solder is well suited for vintage gear, through-hole assemblies, and hobbyist projects where a dependable, easy-to-control flow is valued. The rosin-activated flux forms a resin-like surface that enhances wetting on copper pads and pin terminals, promoting bright, durable-looking joints once cooled. The 1 lb reel reduces the need for frequent repurchases during longer builds or multiple repairs, making it a practical choice for technicians and dedicated hobbyists alike.

Key specifications

• 1 lb spool
• Leaded solder: 63/37 Sn/Pb
• Flux type: Rosin Activated RA
• External diameter: 0.635 mm (0.025 in)
• Melting temperature: ~183 C
• RoHS compliant: NO
• Product category: Soldering wire

Ideal use cases

• Electronics repair on vintage gear and through-hole components
• General prototyping and hobby electronics on medium-density boards
• Wire tinning and connector junctions for reliable electrical connections
• Projects where a forgiving, well-wetting flow is beneficial

Note: Benefits described reflect documented features and common usage. Your results depend on technique, board design, and materials. Use in environments where leaded solder is appropriate and compliant with local regulations.