The JSM6406 from JSMicro Semiconductor is a MOSFET with Continous Drain Current 140 A, Drain Source Resistance 2.1 to 3.5 milli-ohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.3 to 2.4 V. Tags: Surface Mount. More details for JSM6406 can be seen below.