Description A MOSFET (metal-oxide-semiconductor field-effect transistor, pronounced MAWS-feht) is a special type of field-effect transistor (FET) that functions 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 leave it via the drain. The width of the channel is controlled by the voltage applied to an electrode called the gate, which is physically located between the source and the drain and is isolated from the channel by an extremely thin layer of metal oxide. There are two ways a MOSFET operates. The first is called depletion mode. When no voltage is applied to the gate, the channel exhibits maximum conductivity. As the gate voltage increases (positively or negatively, depending on whether the channel is made of P-type or N-type semiconductor material), the channel's conductivity decreases. The second way a MOSFET operates is called enhancement mode. When there is no voltage on the gate, there is practically no channel and the device does not conduct. The channel is created by applying a voltage to the gate transformer. The higher the gate voltage, the better the device's conductivity. Color: black + silver Material: plastic + metal Package contents: 10 x IRF9540 P-channel power MOSFET Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.