This part is a kind of semiconductor called 3N251.

Function of this product has GLASS PASSIVATED SINGLE-PHASE RECTIFIER BRIDGE.

Manufacturers : General Semiconductor

Image and pinout :

Some of the text within the PDF file :

KBP005M THRU KBP10M 3N246 THRU 3N252 GLASS PASSIVATED SINGLE-PHASE RECTIFIER BRIDGE Reverse Voltage - 50 to 1000 Volts Case Style KBPM 0.600 (15.24) 0.125 x 45o (3.2) 0.560 (14.22) Forward Current - 1.5 Amperes FEATURES 0.460 (11.68) 0.420 (10.67) 0.500 (12.70) 0.460 (11.68) 60 (15.2) MIN. 0.060 (1.52) 0.160 (4.1) 0.140 (3.6) 0.50 (12.7) MIN. ♦ Plastic package has Underwriters Laboratory Flammability Classification 94V-0 ♦ This series is UL listed under Recognized Component Index, file number E54214 ♦ Glass passivated chip junctions ♦ High surge current capability ♦ Ideal for printed circuit board ♦ High temperature soldering guaranteed: 260°C/10 seconds at 5 lbs. (2.3kg) tension 0.034 (8.6) 0.028 (7.6) DIA. MECHANICAL DATA 0.105 (2.67) 0.085 (2.16) 0.200 (5.08) 0.180 [ ... ]

3N251 PDF Datasheet Download