The JSM30N03D from JSMicro Semiconductor is a MOSFET with Continous Drain Current 8.2 to 30 A, Drain Source Resistance 15 to 30 milli-ohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.2 to 2.5 V. Tags: Surface Mount. More details for JSM30N03D can be seen below.