FQA46N15 is a 150V N-channel MOSFET from Fairchild. Its features are RDS(on) = 0.042 Ω @VGS = 10 V, low gate charge (typ 85 nC), low Crss (typ 100pF), fast switching, 100% avalanche tested, improved dv/dt capability and 175°C maximum junction temperature rating