This part is a kind of semiconductor called BD249C.
Function of this product has NPN SILICON POWER TRANSISTORS.
Manufacturers : Power Innovations Limited
Image and pinout :
Some of the text within the PDF file :
BD249, BD249A, BD249B, BD249C NPN SILICON POWER TRANSISTORS Copyright © 1997, Power Innovations Limited, UK JUNE 1973 - REVISED MARCH 1997 q Designed for Complementary Use with the BD250 Series 125 W at 25°C Case Temperature B SOT-93 PACKAGE (TOP VIEW) 1 q q q q 25 A Continuous Collector Current 40 A Peak Collector Current Customer-Specified Selections Available E 3 Pin 2 is in electrical contact with the mounting base. MDTRAA C 2 absolute maximum ratings at 25°C case temperature (unless otherwise noted) RATING BD249 Collector-emitter voltage (RBE = 100 Ω) BD249A BD249B BD249C BD249 Collector-emitter voltage (IC = 30 mA) BD249A BD249B BD249C Emitter-base voltage Continuous collector current Peak collector current (see Note 1) Continuous base current Continuous device dissipati [ ... ]