This part is a kind of semiconductor called RS204.

Function of this product has SINGLE-PHASE SILICON BRIDGES.

Manufacturers : SEMTECH

Image and pinout :

Some of the text within the PDF file :

RS201 THRU RS207 SINGLE-PHASE SILICON BRIDGES Reverse Voltage – 50 to 1000 Volts Forward Current – 2.0 Amperes Features • Surge overload rating –50 amperes peak • Ideal for printed circuit board • Plastic material has Underwriters Laboratory • Flammability Classification 94V-0 • Mounting position: Any • Lead: Silver plated copper lead KBP .600(15.24) .560(14.22) .566(14.4) .528(13.4) + AC - .460(11.58) .420(10.57) .034(0.86)DIA. .028(0.76)TYP. .600 (15.2) MIN. .105 (2.67) .160(4.1) .140(3.6) .200(5.08) .180(4.57) Dimensions in mm Absolute Maximum Ratings and Characteristics Ratings at 25oC ambient temperature unless otherwise specified. Resistive or inductive load, 60Hz. For capacitive load, derate current by 20% Symbols RS RS RS RS RS 201 202 203 204 20 [ ... ]

RS204 PDF Datasheet Download