uThe FR104W with Diodes - Rectifiers - Fast Recovery 400V 1A 1.3V @ 1A 150ns SOD-123F RoHS is a fast-recovery rectifier, which is a type of diode used to convert alternating current (AC) to direct current (DC). It is manufactured by Shikuesu and is specifically rated for 400V 1A, with a 1.3V forward voltage drop, and a recovery time of 150ns. The FR104W is housed in a SOD-123F RoHS compliant package, and is available in bulk or single temperature grades for operating environments from -55°C to +125°C.