This part is a kind of semiconductor called 1N5391.

Function of this product has PLASTIC SILICON RECTIFIER.

Manufacturers : TRSYS

Image and pinout :

Some of the text within the PDF file :

1N5391 THRU 1N5399 PLASTIC SILICON RECTIFIER VOLTAGE - 50 to 1000 Volts CURRENT - 1.5 Amperes FEATURES l l l l Low cost High current capability High reliability Plastic package has Underwriters Laboratory Flammability Classification 94V-O utilizing Flame Retardant Epoxy Molding Compound l l l 1.5 ampere operation at TL=70 with no thermal runaway Exceeds environmental standards of MIL-S-19500/228 Low leakage DO-15 MECHANICAL DATA Case: Molded plastic , DO-15 Terminals: Plated axial leads, solderable per MIL-STD-202, Method 208 Polarity: Color band denotes cathode Mounting Position: Any Weight: 0.015 ounce, 0.4 gram MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Ratings at 25 ambient temperature unless otherwise specified. Single phase, half wave, 60 Hz, resistive or inductive load. For ca [ ... ]

1N5391 PDF Datasheet Download