This part is a kind of semiconductor called TIP102.

Function of this product has Darlington NPN Power Transistors.

Manufacturers : TAITRON

Image and pinout :

Some of the text within the PDF file :

Darlington Power Transistors (NPN) TIP100/101/102 Darlington Power Transistors (NPN) Features • Designed for general-purpose amplifier and low speed switching applications • RoHS Compliant Mechanical Data Case: Terminals: Weight: TO-220, Plastic Package Solderable per MIL-STD-202, Method 208 0.08 ounces, 2.24 grams TO-220 Maximum Ratings (T Ambient=25ºC unless noted otherwise) Symbol Description TIP100 VCBO Collector-Base Voltage 60 VCEO Collector-Emitter Voltage 60 VEBO Emitter-Base Voltage IC Collector Current Continuous ICM Collector Current Peak IB Base Current Power Dissipation upto TC=25°C PD Power Dissipation upto TA=25°C Power Dissipation Derate above TA=25°C RθJA Thermal Resistance from Junction to Ambient in Free Air RθJC Thermal Resistance fr [ ... ]

TIP102 PDF Datasheet Download