Kester 24-9574-1402 K100LD solder wire is a lead free, RoHS compliant professional choice featuring a 99.3% tin and 0.7% copper composition with 3.3% 48 rosin activated flux core. The 0.031 inch diameter makes it ideal for PCB assembly, electronics rework, through hole soldering, and precision repair work where medium joint sizes and reliable wetting are required. This made in USA formulation delivers consistent performance across a wide range of soldering applications, from production environments to field repairs. The rosin activated flux provides excellent flow and joint quality, though post solder cleaning is recommended for optimal reliability and longevity.
Product Features:
Diameter: .031 inches (0.8 mm)
Weight: 1 lb - Conveniently packaged for both hobbyists and professionals.
Composition: Low Cost Alloy (99.3% Tin .7% Cu)
Lead-Free: Complies with RoHS regulations, making it an environmentally friendly choice.
Flux Core: 3.3% 48 Rosin Activated Flux
Melting Point: 227° C 441° F
.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.
Size guide text
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