This part is a kind of semiconductor called 02N120.
Function of this product has SKP02N120.
Manufacturers : Infineon Technologies
Image and pinout :

Some of the text within the PDF file :
www.net SKP02N120 SKB02N120 Fast IGBT in NPT-technology with soft, fast recovery anti-parallel EmCon diode • 40lower Eoff compared to previous generation • Short circuit withstand time – 10 µs • Designed for: - Motor controls - Inverter - SMPS • NPT-Technology offers: - very tight parameter distribution - high ruggedness, temperature stable behaviour - parallel switching capability C G E P-TO-220-3-1 (TO-220AB) P-TO-263-3-2 (D²-PAK) (TO-263AB) • Complete product spectrum and PSpice Models : http://www.infineon.com/igbt/ Type SKP02N120 SKB02N120 Maximum Ratings Parameter Collector-emitter voltage DC collector current TC = 25°C TC = 100°C Pulsed collector current, tp limited by Tjmax Turn off safe operating area VCE ≤ 1200V, Tj ≤ 150°C Diode forward cur [ ... ]
02N120 PDF Datasheet Download
