The BUK7Y12-55B from Nexperia is a MOSFET with Continous Drain Current 43.7 to 61.8 A, Drain Source Resistance 8.2 to 27.6 milliohm, Drain Source Breakdown Voltage 55 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 4.4 V. Tags: Surface Mount. More details for BUK7Y12-55B can be seen below.