The FQB55N10 from onsemi is a MOSFET with Continous Drain Current 55 A, Drain Source Resistance 21 to 26 milliohm, Drain Source Breakdown Voltage 100 V, Gate Source Voltage -25 to 25 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for FQB55N10 can be seen below.