The RM18N200HD from Rectron Semiconductor is a MOSFET with Continous Drain Current 18.2 A, Drain Source Resistance 95 to 140 milliohm, Drain Source Breakdown Voltage 200V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 3 V. Tags: Surface Mount. More details for RM18N200HD can be seen below.