Kester 24-9574-9574 is a lead free solder wire engineered for professional electronics assembly and rework applications. With a 99.3% tin and 0.7% copper alloy composition, 0.062 inch diameter, and 275 rosin activated flux, this solder delivers reliable joints on PCBs, through hole components, and repair work. The 227°C melting point and no clean formulation make it ideal for high precision soldering where consistent wetting and strong connections matter. Trusted by electronics shops and production teams, K100LD combines the cost efficiency of low tin alloy with RoHS compliance and American manufacturing quality.
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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