The RM17N800HD from Rectron Semiconductor is a MOSFET with Continous Drain Current 17 A, Drain Source Resistance 265 to 320 milliohm, Drain Source Breakdown Voltage 800 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 4 V. Tags: Surface Mount. More details for RM17N800HD can be seen below.