Kester part number 24-6337-9703 is a professional grade tin lead solder wire featuring a classic Sn63Pb37 alloy composition with 3.3 percent 285 rosin mildly activated flux, supplied on a 1 pound spool at 0.015 inch diameter. This thin gauge formulation is ideal for precision work including PCB assembly, delicate electronics rework, fine through hole soldering, and detailed repair applications where control and accessibility matter most. The eutectic alloy composition melts at 183 degrees Celsius, providing reliable wetting and a consistent joint finish across professional and hobbyist workbenches. As a USA made product, this solder wire delivers the quality and performance you expect from Kester, a trusted name in professional soldering supplies.
Key Features:
Alloy Composition: Sn63Pb37 (63% Tin, 37% Lead)
Diameter: .015" ( 0.4 mm)
Weight: 1 lb (approximately 454 grams)
Package Type: Spool (SPL)
Flux Core: 3.3% 285 Rosin Mildly Activated Flux
Melting Point: 183° C 361° F
Eutectic solder melts and solidifies at the same temperature.
.015" Diameter suitable for smaller soldering jobs. Rosin Mildly Activated flux should be cleaned after use.
Ultra fine sized diameter useful for precision soldering and micro electronics.
.015" (0.4 mm)
Very fine sized diameter useful for precision soldering and jobs requiring small amounts of solder.
.020" (0.5 mm)
Fine sized diameter used for through hole and and surface mount work. Delivers a Controlled amount of solder.
.025" (0.6 mm)
Ideal for standard circuit board components where precision is needed but not ultra-fine work.
.031" (0.8 mm)
Ideal for fixing circuit boards, replacing components, and general rework. Popular for Arduino, Raspberry Pi, and DIY projects. It's a versatile diameter, often called the "sweet spot" for electronics.
.040" (1.0 mm)
Perfect for surface-mount devices (SMDs) and medium components where precision is key but more solder is needed.
.050" (1.27 mm)
Used for various tasks where a balance of flow and control is required, like general electrical repairs.
.062" (1.5 mm)
medium-thickness wire ideal for general electronics, larger through-hole components, appliance repair, automotive work, and crafts like stained glass
.093" (2.36 mm)
versatile, medium-to-thick wire used for general and heavier-duty electrical, electronics, automotive, and HVAC repairs/manufacturing.
