The FQP17N40 from onsemi is a MOSFET with Continous Drain Current 16 A, Drain Source Resistance 210 to 270 milli-ohm, Drain Source Breakdown Voltage 400 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 5 V. Tags: Through Hole. More details for FQP17N40 can be seen below.