The PSMN4R4-80BS from Nexperia is a MOSFET with Continous Drain Current 100 A, Drain Source Resistance 3.8 to 10.7 milliohm, Drain Source Breakdown Voltage 80 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 4.6 V. Tags: Surface Mount. More details for PSMN4R4-80BS can be seen below.