This part is a kind of semiconductor called B250C800DM.

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

Manufacturers : General Semiconductor

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Some of the text within the PDF file :

B40C800DM THRU B380C800DM MINIATURE GLASS PASSIVATED SINGLE-PHASE BRIDGE RECTIFIER Reverse Voltage - 65 to 600 Volts Forward Current - 0.9 Ampere Case Style DFM FEATURES ♦ Plastic package has Underwriters Laboratory Flammability Classification 94V-0 ♦ Glass passivated chip junctions ♦ Surge overload rating of 45 Amperes peak ♦ Ideal for printed circuit boards ♦ High temperature soldering guaranteed: 260°C/10 seconds at 5 lbs. (2.3kg) tension 0.255 (6.5) 0.315 (8.00) 0.245 (6.2) 0.285 (7.24) 0.335 (8.51) 0.320 (8.12) 0.130 (3.3) 0.120 (3.05) 0.045 (1.14) 0.035 (0.89) 0.023 (0.58) 0.018 (0.46) 0.205 (5.2) 0.195 (5.0) 0.080 (2.03) 0.050 (1.27) MECHANICAL DATA 0.013 (3.3) 0.0086 (0.22) 0.185 (4.69) 0.150 (3.81) 0.075 (1.90) 0.055 (1.39) 0.350 (8.9) 0.300 (7.6) Dimensions in [ ... ]

B250C800DM PDF Datasheet Download