The BUK9Y1R9-40H from Nexperia is a MOSFET with Continous Drain Current 120 A, Drain Source Resistance 1 to 5.7 milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -10 to 16 V, Gate Source Threshold Voltage 0.6 to 2.5 V. Tags: Surface Mount. More details for BUK9Y1R9-40H can be seen below.