The IXFQ20N50P3 from Littelfuse is a MOSFET with Continous Drain Current 20 A, Drain Source Resistance 300 Milliohm, Drain Source Breakdown Voltage 500 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 5 V. Tags: Through Hole. More details for IXFQ20N50P3 can be seen below.