The JSM50N20P from JSMicro Semiconductor is a MOSFET with Continous Drain Current 50 A, Drain Source Resistance 42 to 50 milli-ohm, Drain Source Breakdown Voltage 200 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2.0 to 4.0 V. Tags: Surface Mount. More details for JSM50N20P can be seen below.