This part is a kind of semiconductor called HER303.

Function of this product has HIGH EFFICIENCY RECTIFIER(VOLTAGE RANGE 50 to 1000 Volts CURRENT 3.0 Ampere).

Manufacturers : Rectron Semiconductor

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RECTRON SEMICONDUCTOR TECHNICAL SPECIFICATION HER301 THRU HER308 HIGH EFFICIENCY RECTIFIER VOLTAGE RANGE 50 to 1000 Volts CURRENT 3.0 Ampere FEATURES * * * * * * * Low power loss, high efficiency Low leakage Low forward voltage drop High current capability High speed switching High reliability High current surge DO-201AD MECHANICAL DATA * * * * * Case: Molded plastic Epoxy: UL 94V-O rate flame retardant Lead: MIL-STD-202E method 208C guaranteed Mounting position: Any Weight: 1.20 grams MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Ratings at 25 o C ambient temperature unless otherwise specified. Single phase, half wave, 60 Hz, resistive or inductive load. For capacitive load, derate current by 20%. Dimensions in inches and (millimeters) MAXIMUM RATINGS (At T A = 25 oC unless otherw [ ... ]

HER303 PDF Datasheet Download