The 49500WS Sn100e Water Soluble Solder Wire is an electronic grade solder wire. It uses a high-purity, eutectic 99.5% tin, 0.5% copper, and cobalt alloy, which is complemented with a water-soluble flux core. The 49500WS solder meets J-STD-004B, ASTM B 32, and exceeds J-STD-006C specifications.This solder is a great lead-free alternative to leaded solders. It generally provides better wetting, contact angle, flow, and visual appearance than typical Sn63/Pb37 no clean solders, while still delivering excellent performance characteristics. It offers superior solder penetration into plated through holes and surface mount interconnects. Further, it is a suitable replacement for SAC305 solder since the 49500WS forms brighter, shinier, and less grainy joints. Furthermore, it is less expensive.The 49500WS solders achieve a consistent solder and flux percentage through a state-of-the-art, extrusion, wire-drawing machine. This machine continually monitors the wire to prevent voids and ensure consistency, providing a top-grade solder wire.