The RM30N100HD from Rectron Semiconductor is a MOSFET with Continous Drain Current 30 A, Drain Source Resistance 40 to 60 milliohm, Drain Source Breakdown Voltage 100 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for RM30N100HD can be seen below.