MOSFETs

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. For more information about MOSFETs, please see our complete guide to MOSFETs.

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 like 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 like standard MOSFETs but they are designed to handle a higher level of power.

N-Channel vs. P-Channel MOSFETs

N-Channel MOSFETs contain additional electrons which are free to move around. They are a 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.


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Description Price Channel Type Maximum Continuous Drain Current Maximum Drain Source Voltage Maximum Drain Source Resistance Package Type Mounting Type Pin Count Maximum Gate Source Voltage Channel Mode Maximum Gate Threshold Voltage Minimum Gate Threshold Voltage Maximum Power Dissipation Transistor Configuration Number of Elements per Chip
RS Stock No. 541-1736
Mfr. Part No.IRF5305PBF
BrandInfineon
£0.90
Each
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P 31 A 55 V 60 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 4V 2V 110 W Single 1
RS Stock No. 919-4924
Mfr. Part No.IRF5305PBF
BrandInfineon
£0.758
Each (In a Tube of 50)
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P 31 A 55 V 60 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 4V 2V 110 W Single 1
RS Stock No. 922-7831
Mfr. Part No.BS250P
£0.277
Each (In a Bag of 4000)
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P 230 mA 45 V 14 Ω E-Line Through Hole 3 -20 V, +20 V Enhancement 3.5V - 700 mW Single 1
RS Stock No. 215-6688
Mfr. Part No.BS250P
£0.646
Each (In a Pack of 5)
Units
P 230 mA 45 V 14 Ω E-Line Through Hole 3 -20 V, +20 V Enhancement 3.5V - 700 mW Single 1
RS Stock No. 671-5064
Mfr. Part No.FQP27P06
£1.092
Each (In a Pack of 5)
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P 27 A 60 V 70 mΩ TO-220AB Through Hole 3 -25 V, +25 V Enhancement 4V 2V 120 W Single 1
RS Stock No. 178-4752
Mfr. Part No.FQP27P06
£0.909
Each (In a Tube of 50)
Units
P 27 A 60 V 70 mΩ TO-220AB Through Hole 3 -25 V, +25 V Enhancement 4V 2V 120 W Single 1
RS Stock No. 919-4886
Mfr. Part No.IRF9540NPBF
BrandInfineon
£0.717
Each (In a Tube of 50)
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P 23 A 100 V 117 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 4V 2V 140 W Single 1
RS Stock No. 541-1225
Mfr. Part No.IRF9540NPBF
BrandInfineon
£0.84
Each
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P 23 A 100 V 117 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 4V 2V 140 W Single 1
RS Stock No. 166-1711
Mfr. Part No.FDV304P
£0.033
Each (On a Reel of 3000)
Units
P 460 mA 25 V 1.1 Ω SOT-23 Surface Mount 3 +8 V Enhancement - 0.65V 350 mW Single 1
RS Stock No. 354-4913
Mfr. Part No.FDV304P
£0.22
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P 460 mA 25 V 1.1 Ω SOT-23 Surface Mount 3 +8 V Enhancement - 0.65V 350 mW Single 1
RS Stock No. 919-4860
Mfr. Part No.IRF9530NPBF
BrandInfineon
£0.611
Each (In a Tube of 50)
Units
P 14 A 100 V 200 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 4V 2V 79 W Single 1
RS Stock No. 541-0828
Mfr. Part No.IRF9530NPBF
BrandInfineon
£0.72
Each
Units
P 14 A 100 V 200 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 4V 2V 79 W Single 1
RS Stock No. 541-1720
Mfr. Part No.IRF5210PBF
BrandInfineon
£1.56
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Units
P 40 A 100 V 60 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 4V 2V 200 W Single 1
RS Stock No. 919-4915
Mfr. Part No.IRF5210PBF
BrandInfineon
£1.336
Each (In a Tube of 50)
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P 40 A 100 V 60 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 4V 2V 200 W Single 1
RS Stock No. 301-322
Mfr. Part No.IRLML6402TRPBF
BrandInfineon
£0.366
Each (In a Pack of 5)
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P 3.7 A 20 V 65 mΩ SOT-23 Surface Mount 3 -12 V, +12 V Enhancement 1.2V 0.4V 1.3 W Single 1
RS Stock No. 919-4722
Mfr. Part No.IRLML6402TRPBF
BrandInfineon
£0.081
Each (On a Reel of 3000)
Units
P 3.7 A 20 V 65 mΩ SOT-23 Surface Mount 3 -12 V, +12 V Enhancement 1.2V 0.4V 1.3 W Single 1
RS Stock No. 124-1726
Mfr. Part No.NDT452AP
£0.269
Each (On a Reel of 4000)
Units
P 5 A 30 V 65 mΩ SOT-223 Surface Mount 3 + Tab -20 V, +20 V Enhancement - 1V 3 W Single 1
RS Stock No. 671-1100
Mfr. Part No.NDT452AP
£0.686
Each (In a Pack of 5)
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P 5 A 30 V 65 mΩ SOT-223 Surface Mount 3 + Tab -20 V, +20 V Enhancement - 1V 3 W Single 1
RS Stock No. 892-2217
Mfr. Part No.BSS84PH6327XTSA2
BrandInfineon
£0.075
Each (In a Pack of 250)
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P 170 mA 60 V 12 Ω SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 2V 1V 360 mW Single 1
RS Stock No. 541-0553
Mfr. Part No.IRFD9120PBF
BrandVishay
£0.73
Each
Units
P 1 A 100 V 600 mΩ HVMDIP Through Hole 4 -20 V, +20 V Enhancement - 2V 1.3 W Single 1