This part is a kind of semiconductor called K30H603.

Function of this product has IGBT.

Manufacturers : Infineon

Image and pinout :

Some of the text within the PDF file :

IGBT HighspeedDuoPack:IGBTinTrenchandFieldstoptechnology withsoft,fastrecoveryanti-paralleldiode IKW30N60H3 600Vhighspeedswitchingseriesthirdgeneration Datasheet IndustrialPowerControl http:// IKW30N60H3 Highspeedswitchingseriesthirdgeneration HighspeedDuoPack:IGBTinTrenchandFieldstoptechnologywithsoft,fast recoveryanti-paralleldiode  Features: TRENCHSTOPTMtechnologyoffering •verylowVCEsat •lowEMI •Verysoft,fastrecoveryanti-paralleldiode •maximumjunctiontemperature175°C •qualifiedaccordingtoJEDECfortargetapplications •Pb-freeleadplating;RoHScompliant •completeproductspectrumandPSpiceModels: http://www.infineon.com/igbt/ Applications: •uninterruptiblepowersupplies •weld [ ... ]

K30H603 PDF Datasheet Download