View bdx53f datasheet:

BDX53F BDX54F COMPLEMENTARY SILICON POWER DARLINGTON TRANSISTORS SGS-THOMSON PREFERRED SALESTYPES COMPLEMENTARY PNP - NPN DEVICES MONOLITHIC DARLINGTON CONFIGURATION INTEGRATED ANTIPARALLEL COLLECTOR-EMITTER DIODE APPLICATIONS LINEAR AND SWITCHING INDUSTRIAL 3 2 EQUIPMENT 1 DESCRIPTION TO-220 The BDX53F is a silicon epitaxial-base NPN power transistors in monolithic Darlington configuration and are mounted in Jedec TO-220 plastic package. It is intented for use in power linear and switching applications. The complementary PNP types is BDX54F. INTERNAL SCHEMATIC DIAGRAM R Typ. = 10 K? R Typ. = 150 ? 1 2 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit NPN BDX53F PNP BDX54F VCBO Collector-Base Voltage (IE = 0) 160 V VCEO Collector-Emitter Volta