Product Name: IRF1404 Large Chip N-Channel MOSFET Color: Black + Silver Material: Plastic + Metal MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) is a type of field-effect transistor (FET) that controls the flow of charge carriers (electrons or holes) by varying the width of a conductive channel. The wider the channel, the better the device conducts. Charge carriers enter the channel at the source and exit via the drain. The channel width is controlled by the voltage applied to the gate electrode, which is positioned between the source and drain and insulated from the channel by a thin layer of metal oxide. MOSFETs operate in two modes: depletion mode and enhancement mode. In depletion mode, the channel is fully conductive with zero gate voltage; conductivity decreases as gate voltage increases. In enhancement mode, no channel exists at zero gate voltage; a conductive channel forms only when sufficient gate voltage is applied—higher gate voltage results in better conduction. Package Contents: 5 x MOSFETs Note: Lighting conditions and display settings may cause slight color variation between the image and the actual product. Measurement tolerance is ±1–3 cm.