This part is a kind of semiconductor called BD240.

Function of this product has PNP SILICON POWER TRANSISTORS.

Manufacturers : Bourns

Image and pinout :

Some of the text within the PDF file :

BD240, BD240A, BD240B, BD240C PNP SILICON POWER TRANSISTORS ● Designed for Complementary Use with the BD241 Series ● 30 W at 25°C Case Temperature ● 2 A Continuous Collector Current ● 4 A Peak Collector Current ● Customer-Specified Selections Available TO-220 PACKAGE (TOP VIEW) B1 C2 E3 Pin 2 is in electrical contact with the mounting base. MDTRACA absolute maximum ratings at 25°C case temperature (unless otherwise noted) RATING SYMBOL VALUE UNIT Collector-emitter voltage (RBE = 100 Ω) Collector-emitter voltage (IC = -30 mA) Emitter-base voltage Continuous collector current Peak collector current (see Note 1) Continuous base current Continuous device dissipation at (or below) 25°C case temperature (see Note 2) Continuous device dissipation at (or below) 25°C free ai [ ... ]

BD240 PDF Datasheet Download