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.

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Beskrivning Pris Channel Type Maximum Continuous Drain Current Maximum Drain Source Voltage Maximum Drain Source Resistance Package Type Maximum Gate Threshold Voltage Mounting Type Minimum Gate Threshold Voltage Pin Count Maximum Gate Source Voltage Channel Mode Maximum Power Dissipation Transistor Configuration Number of Elements per Chip
RS-artikelnummer 124-3703
Tillv. art.nrRJK0852DPB-WS#J5
10,864 kr
Each (In a Pack of 5)
N 30 A 80 V 14 mΩ LFPAK - Surface Mount - 4+Tab -20 V, +20 V Enhancement 55 W Single 1
RS-artikelnummer 124-3649
Tillv. art.nr2SK1339-E
33,345 kr
Each (In a Pack of 2)
N 3 A 900 V 7 Ω TO-3P - Through Hole - 3 + Tab -30 V, +30 V Enhancement 80 W Single 1
RS-artikelnummer 121-6891
Tillv. art.nrNP15P06SLG-E1-AY
11,03 kr
Each (In a Pack of 10)
P 15 A 60 V 95 mΩ TO-252 2.5V Surface Mount 1V 3 - Enhancement 30 W Single 1
RS-artikelnummer 121-6897
Tillv. art.nrRJK5015DPK-00#T0
48,08 kr
N 25 A 500 V 240 mΩ TO-3P - Through Hole - 3 +30 V Enhancement 150 W Single 1
RS-artikelnummer 121-6898
Tillv. art.nrRJK6012DPP-E0#T2
28,10 kr
Each (In a Pack of 2)
N 10 A 600 V 920 mΩ TO-220FP - Through Hole - 3 +30 V Enhancement 30 W Single 1
RS-artikelnummer 772-5302
Tillv. art.nr2SK1317-E
52,32 kr
N 7 A 1500 V 12 Ω SC-65 4V Through Hole - 3 -20 V, +20 V Enhancement 100 W Single 1
RS-artikelnummer 124-3704
Tillv. art.nrRJK1557DPA-WS#J0
15,698 kr
Each (In a Pack of 5)
N 25 A 150 V 58 mΩ WPAK - Surface Mount - 8 -30 V, +30 V Enhancement 30 W Single 1