SAC305 Solder: Solder Wire, Solder Paste, Solder Bar SAC305 Solder is a lead-free tin alloy composed of tin (Sn), silver (Ag) and copper (Cu), with a chemical composition of 96.5% tin, 3.0% silver and 0.5% copper. SAC305 Solder mainly has three product forms: Solder Wire, Solder Paste and Solder Bar, each with its own characteristics and uses.
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