This part is a kind of semiconductor called BUH513.

Function of this product has High Voltage Fast Switching NPN Power Transistor.

Manufacturers : ST Microelectronics

Image and pinout :

Some of the text within the PDF file :

BUH513 HIGH VOLTAGE FASTSWITCHING NPN POWER TRANSISTOR s SGS-THOMSON PREFERRED SALESTYPE s HIGH VOLTAGE CAPABILITY s U.L. RECOGNISED ISOWATT218 PACKAGE (U.L. FILE # E81734 (N)) APPLICATIONS: s HORIZONTAL DEFLECTION FOR COLOUR TVS AND MONITORS s SWITCH MODE POWER SUPPLIES DESCRIPTION The BUH series is designed for use in horizontal deflection circuits in televisions and monitors. 3 2 1 ISOWATT218 INTERNAL SCHEMATIC DIAGRAM ABSOLUTE MAXIMUM RATINGS S ymb ol V CBO V CEO VEBO IC ICM IB IBM Ptot Tstg Tj Parameter Collector-Base Voltage (IE = 0) Collector-Emitter Voltage (IB = 0) Emitter-Base Voltage (IC = 0) Collector Current Collector Peak Current (tp < 5 ms) Base Current Base Peak Current (tp < 5 ms) T otal Dissipat ion at Tc = 25 oC Storage Temperature Max. O perating Junction Temperat [ ... ]

BUH513 PDF Datasheet Download