The JSM40N06D from JSMicro Semiconductor is a MOSFET with Continous Drain Current 20 to 40 A, Drain Source Resistance 20 to 35 ohm, Drain Source Breakdown Voltage 60 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.2 to 2.5 V. Tags: Surface Mount. More details for JSM40N06D can be seen below.