Kester 24-6337-9710 is a professional grade eutectic solder wire featuring Sn63Pb37 alloy composition with a thin 0.031 inch diameter, ideal for precision PCB assembly, electronics rework, and fine through hole soldering applications where control and reliability are essential. The 3.3 percent 285 Rosin Mildly Activated flux core provides consistent wetting and strong mechanical joints without excessive residue, making cleanup straightforward with standard solvents. With a eutectic melting point of 183 degrees Celsius, this solder transitions cleanly from liquid to solid, reducing cold joint risk and improving thermal cycle performance on delicate boards. Made in the USA, this 1 lb spool delivers professional results for technicians and repair shops who demand consistent quality and traceable materials.
Key Features:
Alloy Composition: Sn63Pb37 (63% Tin, 37% Lead)
Diameter: .031" (0.8 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.
.031" Diameter suitable for medium sized soldering jobs. Rosin Flux must 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.
Excellent for hand soldering. Heats to liquid state quickly, and more importantly transitions from liquid to solid state extremely quickly. Finished joint is even and shiny, and needs no/little rosin cleanup. Highly recommended.
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