The JSM50N20 from JSMicro Semiconductor is a MOSFET with Continous Drain Current 50 A, Drain Source Resistance 0.05 to 0.06 ohm, Drain Source Breakdown Voltage 200 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2.0 to 4.0 V. Tags: Through Hole. More details for JSM50N20 can be seen below.