ap20gt60w.pdf datasheet:

AP20GT60WRoHS-compliant ProductAdvanced Power N-CHANNEL INSULATED GATEElectronics Corp. BIPOLAR TRANSISTORFeaturesVCES 600VC High Speed Switching IC 20A Low Saturation VoltageVCE(sat),typ.=1.8V@IC=20ACG RoHS Compliant ProductGCTO-3PEEAbsolute Maximum RatingsSymbol Parameter Rating UnitsVCES Collector-Emitter Voltage 600 VVGE Gate-Emitter Voltage +20 VIC@TC=25oC Collector Current 40 AIC@TC=100oC Collector Current 20 AICM Pulsed Collector Current1 160 APD@TC=25oC Maximum Power Dissipation 125 W TSTG Storage Temperature Range -55 to 150 TJ Operating Junction Temperature Range 150 Notes:1.Pulse width limited by Max. junction temperature .Thermal DataSymbol Parameter Value UnitsRthj-c Thermal Resistance Junction-Case 1 /WRthj-a Thermal Resistance Junction-Ambient 40 /WElectrical Characteristics@Tj=25oC