The JSM18N20D from JSMicro Semiconductor is a MOSFET with Continous Drain Current 11.9 to 18 A, Drain Source Resistance 0.18 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 JSM18N20D can be seen below.