The SiHF6N40D from Vishay is a MOSFET with Continous Drain Current 6 A, Drain Source Resistance 850 to 1000 Milliohm, 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 SiHF6N40D can be seen below.