irf820b transistor ng datasheet pdf IRF820Btagagawa : Fairchild Semiconductor paglalarawan : 500V N-Channel MOSFET IRF820Btagagawa : FAIRCHILD[Fairchild Semiconductor] paglalarawan : 500V N-Channel MOSFET IRF820Btagagawa : Fairchildpaglalarawan : 500V N-Channel MOSFET