This part is a kind of semiconductor called TIP42.

Function of this product has PNP PLASTIC POWER TRANSISTORS.

Manufacturers : CDIL

Image and pinout :

Some of the text within the PDF file :

Continental Device India Limited An ISO/TS 16949, ISO 9001 and ISO 14001 Certified Company PLASTIC POWER TRANSISTORS TIP41, A, B, C NPN TIP42, A, B, C PNP TO-220 Plastic Package Complementary Silicon Transistors intended for a wide variety of Switching and Amplifier Applications, Series and Shunt Regulators, Driver and Output stages of Hi-Fi Amplifiers ABSOLUTE MAXIMUM RATINGS (Ta=25ºC) DESCRIPTION SYMBOL Collector Emitter Voltage Collector Base Voltage Emitter Base Voltage Collector Current Continuous Collector Current Peak Base Current Power Dissipation upto Tc=25ºC Derate above 25ºC Power Dissipation upto Ta=25ºC Derate above 25ºC Unclamped Inductive Load Energy Storage Temperature Junction Temperature VCEO VCBO VEBO IC ICM IB PD PD *E Tstg Tj TIP41 TIP42 40 40 TIP41A TIP4 [ ... ]

TIP42 PDF Datasheet Download