Device identity and key ratings
The GBU6K-E3/51: The Vishay GBU6K-/51 is a single-phase bridge rectifier in the standard GBU through-hole package. It delivers 3.8 A average rectified current and is rated for 800 V peak reverse voltage. The 800 V peak reverse rating suits it for 240 VAC line rectification with margin for mains transients. Forward voltage is specified at 1 V max at 6 A, so conduction loss at the 3.8 A average is well under 4 W.
Temperature range and package
The GBU package is a 4-pin SIP with a standard 5.08 mm pitch, easily hand-soldered or wave-soldered into a PTH layout.
Listed as Active with ROHS3 compliance.