The PSMN1R0-40YSH from Nexperia is a MOSFET with Continous Drain Current 277 to 290 A, Drain Source Resistance 0.85 to 2.2 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 PSMN1R0-40YSH can be seen below.