This part is a kind of semiconductor called K20T60.

Function of this product has IGBT.

Manufacturers : Infineon

Image and pinout :

Some of the text within the PDF file :

IKP20N60T, IKB20N60T TrenchStop Series IKW20N60T Low Loss DuoPack : IGBT in Trench and Fieldstop technology with soft, fast recovery anti-parallel EmCon HE diode • Very low VCE(sat) 1.5 V (typ.) • Maximum Junction Temperature 175 °C • Short circuit withstand time – 5µs • Designed for : - Frequency Converters - Uninterrupted Power Supply • Trench and Fieldstop technology for 600 V applications offers : - very tight parameter distribution - high ruggedness, temperature stable behavior - very high switching speed - low VCE(sat) • Positive temperature coefficient in VCE(sat) • Low EMI • Low Gate Charge P-TO-220-3-1 (TO-220AB) • Very soft, fast recovery anti-parallel EmCon HE diode • Complete product spectrum and PSpice Models : http://www.infineon.com/i [ ... ]

K20T60 PDF Datasheet Download