Kester part number 24-9574-6422 K100LD is a professional grade solder wire engineered for precision electronics work, featuring a tin copper alloy composition of 99.3% Sn and 0.7% Cu in a thin 0.015 inch diameter that excels in PCB assembly, surface mount rework, and detailed through hole soldering applications. The solder uses 331 series rosin activated flux, a water soluble formulation that delivers reliable wetting and strong mechanical bonds while remaining easy to clean. This lead free offering meets RoHS compliance requirements and melts at 227°C, making it suitable for both production environments and field repair work where repeatability and connection integrity are non negotiable. Kester's consistent quality and domestic manufacturing make this spool a trusted choice for professional technicians and electronics shops that demand dependable performance.
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.
