The PSM20N60CTB from PFC Device is a MOSFET with Continous Drain Current 13 to 20 A, Drain Source Resistance 0.165 to 0.45 ohm, Drain Source Breakdown Voltage 600 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2.8 to 3.9 V. Tags: Surface Mount. More details for PSM20N60CTB can be seen below.