The BUK9880-55A from Nexperia is a MOSFET with Continous Drain Current 4 to 7 A, Drain Source Resistance 62 to 147 milliohm, Drain Source Breakdown Voltage 55 V, Gate Source Voltage -15 to 15 V, Gate Source Threshold Voltage 0.6 to 2.3 V. Tags: Surface Mount. More details for BUK9880-55A can be seen below.