The FQB34N20 from onsemi is a MOSFET with Continous Drain Current 31 A, Drain Source Resistance 60 to 75 milliohm, Drain Source Breakdown Voltage 200 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 5 V. Tags: Surface Mount. More details for FQB34N20 can be seen below.