This part is a kind of semiconductor called 3N251-M.

Function of this product has SILICON BRIDGE RECTIFIERS.

Manufacturers : Central Semiconductor

Image and pinout :

Some of the text within the PDF file :

3N247-M SERIES SILICON BRIDGE RECTIFIERS w w w. c e n t r a l s e m i . c o m DESCRIPTION: The CENTRAL SEMICONDUCTOR 3N247-M series types are silicon single phase, full wave bridge rectifiers designed for general purpose applications. MARKING: FULL PART NUMBER CASE B-M MAXIMUM RATINGS: (TA=25°C unless otherwise noted) 3N SYMBOL 247-M Peak Repetitive Reverse Voltage VRRM 100 DC Blocking Voltage VR 100 RMS Reverse Voltage VR(RMS) 70 Average Forward Current (TA=75°C) IO Peak Forward Surge Current IFSM Operating and Storage Junction Temperature TJ, Tstg 3N 248-M 200 200 140 3N 3N 249-M 250-M 400 600 400 600 280 420 1.5 30 -65 to +150 3N 251-M 800 800 560 3N 252-M UNITS 1000 V 1000 V 700 V A A °C ELECTRICAL CHARACTERISTICS PER DIODE: (TA=25°C unless otherwise noted) S [ ... ]

3N251-M PDF Datasheet Download