irfp450a.pdf datasheet:

PD -91884SMPS MOSFETIRFP450AHEXFET Power MOSFETApplicationsVDSS Rds(on) max ID Switch Mode Power Supply ( SMPS ) Uninterruptable Power Supply 500V 0.40 14A High speed power switchingBenefits Low Gate Charge Qg results in SimpleDrive Requirement Improved Gate, Avalanche and Dynamicdv/dt Ruggedness Fully Characterized Capacitance andAvalanche Voltage and CurrentG D STO-247AC Effective Coss Specified ( See AN 1001)Absolute Maximum RatingsParameter Max. UnitsID @ TC = 25C Continuous Drain Current, VGS @ 10V 14ID @ TC = 100C Continuous Drain Current, VGS @ 10V 8.7 AIDM Pulsed Drain Current 56PD @TC = 25C Power Dissipation 190 WLinear Derating Factor 1.5 W/CVGS Gate-to-Source Voltage 30 Vdv/dt Peak Diode Recovery dv/dt 4.1 V/nsTJ Operating Junction and -55 to + 150TSTG Storage Temperature RangeCSoldering Tempera