This part is a kind of semiconductor called B250-C1500R.

Function of this product has SILICON BRIDGE RECTIFIERS.

Manufacturers : EIC discrete Semiconductors

Image and pinout :

Some of the text within the PDF file :

B40 - B380/C1500R PRV : 100 - 900 Volts Io : 1.5 Amperes FEATURES : * * * * * * High case dielectric strength High surge current capability High reliability Low reverse current Low forward voltage drop Ideal for printed circuit board SILICON BRIDGE RECTIFIERS WOB 0.39 (10.0) 0.31 (7.87) 0.22 (5.59) 0.18 (4.57) + AC 1.00 (25.4) MIN. 1.10 (27.9) MIN. 0.034 (0.86) 0.028 (0.71) MECHANICAL DATA : * Case : Reliable low cost construction utilizing molded plastic technique * Epoxy : UL94V-O rate flame retardant * Terminals : Plated leads solderable per MIL-STD-202, Method 208 guaranteed * Polarity : Polarity symbols marked on case * Mounting position : Any * Weight : 1.29 grams AC + AC 0.22 (5.59) 0.18 (4.57) 0.22 (5.59) 0.18 (4.57) Dimension in inches and (millimeter) Rating at 25 °C a [ ... ]

B250-C1500R PDF Datasheet Download