MOSFETs, also known as MOSFET transistors, stands for ’Metal Oxide Semiconductor Field-Effect Transistors’. MOSFETs are transistor devices which are controlled by a capacitor. The "Field-Effect" means that they are controlled by voltage. The aim of a MOSFET is to control the flow of the current passing through from the source to the drain terminals. It acts very similarly to a switch and is used for switching or amplifying electronic signals.

These semiconductor devices are ICs (integrated circuits) which are mounted onto PCBs. MOSFETs come in a range of standard package types such as DPAK, D2PAK, DFN, I2PAK, SOIC, SOT-223 and TO-220.

What are depletion and enhancement modes?

MOSFET transistors have two modes; depletion and enhancement.
Depletion MOSFETs work like a closed switch. The current passes through when no current is applied. The current flow will stop if a negative voltage is applied.
Enhancement mode MOSFETs are similar to a variable resistor and are generally more popular than the depletion mode MOSFETs. They come in n-channel or p-channel variants.

How do MOSFETs work?

The pins on a MOSFET package are the Source, Gate and Drain. When a voltage is applied between the Gate and the Source terminals, current can pass through from the Drain to the Source pins. When the voltage applied to the Gate changes, the resistance from the Drain to the Source will change too. The lower the voltage applied, the higher the resistance. As the voltage increases, the resistance from the Drain to Source will decrease.
Power MOSFETs are similar to standard MOSFETs but they are designed to handle a higher level of power.

N-Channel vs. P-Channel MOSFETs

MOSFETs are made of p-type or n-type doped silicon.

  • N-Channel MOSFETS contain additional electrons which are free to move around. They are the more popular channel type. N-Channel MOSFETs work when a positive charge is applied to the gate terminal.

  • P-Channel MOSFETS substrate contains electrons and electron holes. P-Channel MOSFETs are connected to a positive voltage. These MOSFETs turn on when the voltage supplied to the Gate terminal is lower than the Source voltage.

Where are MOSFETs used?

MOSFETs are found within many applications, such as microprocessors and other memory components. MOSFET transistors are most commonly used as a voltage-controlled switch within circuits.

Looking for MOSFET Drivers?

Lees meer Lees minder


1 - 1 van 1 producten worden weergegeven
Resultaten per pagina
Omschrijving Prijs
RS-stocknr. 168-4753
€ 51,84
Each (In a Tube of 10)
Aantal stuks
Related Products
Easy adjustment of sensor range, daylight detection and ...
Easy adjustment of sensor range, daylight detection and hold timeHigh luminous efficacyEnergy savings of up to 55 % compared to luminaires that use CFLEasy and quick installationVery homogenous lightClear cover protects the reflector against dust and contact3 years ... frequency ...
The E3X-HD series of fibre optic sensors from ...
The E3X-HD series of fibre optic sensors from Omron are easy to operate and the stabilising technology of these sensors reduces maintenance costs. The smart power control function detects the reduction in light and the decrease in incident level due ...
The Petrel LED light fitting works on 230V ...
The Petrel LED light fitting works on 230V voltage rating and is used in both internal and external hazardous area applications. It is available in sizes of 2ft to 5ft and light output up to 10,000lm. It is designed for ...
The AMA/AMBA series of MA motion sensors are ...
The AMA/AMBA series of MA motion sensors are designed to detect humans using infrared rays - irrespective of reflection, material or cleanliness. Other advantages of the AMBA/AMA series include thinner versions for easier device installation, built-in oscillation for certain versions, ...