This part is a kind of semiconductor called 1F6.

Function of this product has FAST SWITCHING PLASTIC RECTIFIER.

Manufacturers : GOOD-ARK Electronics

Image and pinout :

Some of the text within the PDF file :

1F1 THRU 1F7 FAST SWITCHING PLASTIC RECTIFIER Reverse Voltage - 50 to 1000 Volts Forward Current - 1.0 Ampere Features High current capability. Plastic package has Underwriters Laboratory Flammability Classification 94V-0 utilizing Flame retardant epoxy molding compound. 1.0 ampere operation at TA=55 with no thermal runaway Fast switching for high efficiency Low leakage Mechanical Data Case: Molded plastic, R-1 Terminals: Plated axial leads, solderable per MIL-STD-202, method 208 Polarity: Color band denotes cathode Mounting Position: Any Weight: 0.007 ounce, 0.20 gram DIM ENSIONS DIM A B C D inches Min. 0.114 0.095 0.020 1.000 Max. 0.138 0.099 0.024 Min. 2.9 2.42 0.5 25.40 mm Max. 3.5 2.51 0.6 Note Maximum Ratings and Electrical Characteristics Ratings at 25 ambient temperature unless [ ... ]

1F6 PDF Datasheet Download