Product Name: IRF1404 chip N-channel transistor Color: black+silver Material: plastic+metal A MOSFET (metal-oxide-semiconductor field-effect transistor, pronounced MAWS-feht) is a special type of field-effect transistor (FET) that works by electronically varying the width of a channel along which charge carriers (electrons or holes) flow. The wider the channel, the better the device conducts. The charge carriers enter the channel at the source and exit via the drain. The width of the channel is controlled by the voltage on an electrode called the gate, which is physically located between the source and drain and is insulated from the channel by an extremely thin layer of metal oxide. There are two ways in which a MOSFET can operate. The first is called depletion mode. When there is no voltage on the gate, the channel exhibits its maximum conductance. As the voltage on the gate increases (either positive or negative, depending on whether the channel is made of P-type or N-type semiconductor material) the channel conductivity decreases. The other way in which a MOSFET can operate is called enhancement mode. When there is no voltage on the gate there is effectively no channel, and the device does not conduct. A channel is created by applying a voltage to the gate. The higher the gate voltage, the better the device conducts. Package Contents: 5 pcs x Transistor Note: Light and different displays may cause the color of the item in the picture to look a little different from the real thing. The allowable measurement error is +/- 1-3 cm.