This part is a kind of semiconductor called TIP142.

Function of this product has NPN 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 SILICON PLANAR DARLINGTON POWER TRANSISTORS TIP140, 141, 142 NPN TIP145, 146, 147 PNP TO- 3PN Non Isolated Plastic Package Designed for General Purpose Amplifier and Low Frequency Switching Applications ABSOLUTE MAXIMUM RATINGS DESCRIPTION SYMBOL Collector Base Voltage Collector Emitter Voltage Emitter Base Voltage Collector Current Continuous Collector Current Peak Base Current Continuous Total Power Dissipation at Tc = 25ºC Operating and Storage Junction Temperature Range *5ms < 10% Duty Cycle THERMAL RESISTANCE From Junction to case From Junction to Ambient in free air VCBO VCEO VEB0 IC *ICM IB PD Tj, Tstg Rth (j-c) Rth (j-a) TIP140 TIP145 60 60 TIP141 TIP146 80 80 5.0 10 15 0.5 125 - 65 [ ... ]

TIP142 PDF Datasheet Download