The PSMNR90-40SSH from Nexperia is a MOSFET with Continous Drain Current 309 to 375 A, Drain Source Resistance 0.51 to 1.96 milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2.4 to 3.6 V. Tags: Surface Mount. More details for PSMNR90-40SSH can be seen below.