This part is a kind of semiconductor called BD380.
Function of this product has Medium Power Linear and Switching Applications.
Manufacturers : Fairchild Semiconductor
Image and pinout :
Some of the text within the PDF file :
BD376/378/380 BD376/378/380 Medium Power Linear and Switching Applications • Complement to BD375, BD377 and BD379 respectively PNP Epitaxial Silicon Transistor Absolute Maximum Ratings TC=25°C unless otherwise noted Symbol VCBO Collector-Base Voltage Parameter : BD376 : BD378 : BD380 1 TO-126 2.Collector 3.Base 1. Emitter Value - 50 - 75 - 100 - 45 - 60 - 80 -5 -2 -3 -1 25 150 - 55 ~ 150 Units V V V V V V V A A A W °C °C VCEO Collector-Emitter Voltage : BD376 : BD378 : BD380 Emitter-Base Voltage Collector Current (DC) *Collector Current (Pulse) Base Current Collector Dissipation (TC=25°C) Junction Temperature Storage Temperature VEBO IC ICP IB PC TJ TSTG Electrical Characteristics TC=25°C unless otherwise noted Symbol VCEO(sus) Parameter *Collector-Emitter Sustaining Volt [ ... ]