The FQB19N20C from onsemi is a MOSFET with Continous Drain Current 19 A, Drain Source Resistance 140 to 170 milliohm, Drain Source Breakdown Voltage 200 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for FQB19N20C can be seen below.