The FQA40N25 from onsemi is a MOSFET with Continous Drain Current 40 A, Drain Source Resistance 51 to 70 milliohm, Drain Source Breakdown Voltage 250 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 5 V. Tags: Through Hole. More details for FQA40N25 can be seen below.