This part is a kind of semiconductor called 6A05.

Function of this product has SILICON RECTIFIER.

Manufacturers : Rectron Semiconductor

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Some of the text within the PDF file :

RECTRON SEMICONDUCTOR TECHNICAL SPECIFICATION 6A05 THRU 6A10 SILICON RECTIFIER VOLTAGE RANGE 50 to 1000 Volts CURRENT 6.0 Amperes FEATURES * * * * * Low cost Low leakage Low forward voltage drop High current capability High surge current capability R-6 MECHANICAL DATA * * * * * Case: Molded plastic Epoxy: Device has UL flammability classification 94V-O Lead: MIL-STD-202E method 208C guaranteed Mounting position: Any Weight: 2.08 grams 1.0 (25.4) MIN. .052 (1.3) DIA. .048 (1.2) .360 (9.1) .340 (8.6) .360 (9.1) DIA. .340 (8.6) 1.0 (25.4) MIN. 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 (m [ ... ]

6A05 PDF Datasheet Download