IRF840 datasheet. IRF840 manufactured by: 8A, 500V, 0.850 Ohm, N-Channel Power MOSFET: Download IRF840 datasheet from Fairchild Semiconductor: pdf 100 kb : 500V Single N-Channel HEXFET Power MOSFET in a TO-220AB package Others with the same file for datasheet: IRF840PBF: Download IRF840 datasheet from