The JSM20N50F from JSMicro Semiconductor is a MOSFET with Continous Drain Current 12.9 to 20.0 A, Drain Source Resistance 0.21 to 0.26 ohm, Drain Source Breakdown Voltage 500 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2.0 to 4.0 V. Tags: Through Hole. More details for JSM20N50F can be seen below.