The CDM4-600LR from Central Semiconductor is a MOSFET with Continous Drain Current 4 A, Drain Source Resistance 770 to 880 milliohm, Drain Source Breakdown Voltage 600 V, Gate Source Voltage 30 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for CDM4-600LR can be seen below.