The RM210N75HD from Rectron Semiconductor is a MOSFET with Continous Drain Current 210 A, Drain Source Resistance 3 to 4 milliohm, Drain Source Breakdown Voltage 75 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for RM210N75HD can be seen below.