The RM200N40DF from Rectron Semiconductor is a MOSFET with Continous Drain Current 200 A, Drain Source Resistance 0.9 to 1.5 milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.2 to 2.2 V. Tags: Surface Mount. More details for RM200N40DF can be seen below.