■ This is an N-channel MOSFET that can control a large power of 100V 20A, despite being in a TO-220 package. It is ideal for analog circuits such as the output stage of a power amplifier, as well as for driving motors, solenoids, and other devices. See the datasheet at https://akitora.com/pdf/irf540.pdf This is a set of 2 pieces, and includes insulation sheets and washers.