This part is a kind of semiconductor called BD240.

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 :

BD240/A/B/C BD240/A/B/C Medium Power Linear and Switching Applications • Complement to BD239/A/B/C respectively 1 TO-220 2.Collector 3.Emitter 1.Base PNP Epitaxial Silicon Transistor Absolute Maximum Ratings TC=25°C unless otherwise noted Symbol VCEO Parameter Collector-Base Voltage : BD240 : BD240A : BD240B : BD240C VCER Collector-Emitter Voltage : BD240 : BD240A : BD240B : BD240C Emitter-Base Voltage Collector Current (DC) *Collector Current (Pulse) Base Current Collector Dissipation ( TC=25°C) Junction Temperature Storage Temperature - 45 - 60 - 80 - 100 - 55 - 70 - 90 - 115 -5 -2 -4 - 0.6 30 150 - 65 ~ 150 V V V V V V V V V A A A W °C °C Value Units VEBO IC ICP IB PC TJ TSTG Electrical Characteristics TC=25°C unless otherwise noted Symbol VCEO(sus) Parameter * Collector-E [ ... ]

BD240 PDF Datasheet Download