The FQB19N20 from onsemi is a MOSFET with Continous Drain Current 19.4 A, Drain Source Resistance 120 to 150 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 FQB19N20 can be seen below.