The BUK7M45-40E from Nexperia is a MOSFET with Continous Drain Current 13 to 19 A, Drain Source Resistance 33 to 89 milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 4.5 V. Tags: Surface Mount. More details for BUK7M45-40E can be seen below.