This part is a kind of semiconductor called KTB1124.
Function of this product has EPITAXIAL PLANAR PNP TRANSISTOR.
Manufacturers : KEC
Image and pinout :
Some of the text within the PDF file :
SEMICONDUCTOR TECHNICAL DATA VOLTAGE REGULATORS, RELAY DRIVERS LAMP DRIVERS, ELECTRICAL EQUIPMENT FEATURES Adoption of MBIT processes. Low collector-to-emitter saturation voltage. Fast switching speed. Large current capacity and wide ASO. Complementary to KTD1624. KTB1124 EPITAXIAL PLANAR PNP TRANSISTOR MAXIMUM RATING (Ta=25 ) CHARACTERISTIC SYMBOL RATING Collector-Base Voltage Vollector-Emitter Voltage Emitter-Base Voltage Collector Current Collector Current(Pulse) Base Current Collector Power Dissipation Junction Temperature VCBO VCEO VEBO IC ICP IB PC PC* Tj -60 -50 -6 -3 -6 -600 500 1 150 Storage Temperature Range Tstg -55 150 * : Package mounted on ceramic substrate(250mm2 0.8t) UNIT V V V A A mA mW W ELECTRICAL CHARACTERISTICS (Ta=25 ) CHARACTERISTIC SYMBOL TEST CONDIT [ ... ]