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. 178-3936
Mfr. Part No.SQM40022E_GE3
$2.42
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N 150 A 40 V 3 mΩ D2PAK (TO-263) Surface Mount 3 + Tab ±20 V Enhancement 2.5V 3.5V 150 W Single 1
RS Stock No. 124-1459
Mfr. Part No.FCH104N60F
$6.17
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N 37 A 600 V 104 mΩ TO-247 Through Hole 3 -30 V, +30 V Enhancement - 3V 357 W Single 1
RS Stock No. 136-4845
Mfr. Part No.BSN20BKR
BrandNexperia
$0.208
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N 330 mA 60 V 2.8 Ω SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 1.4V 0.6V 1.67 W Single 1
RS Stock No. 168-6989
Mfr. Part No.STL60N10F7
$1.06
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N 60 A 100 V 16.5 mΩ PowerFLAT Surface Mount 8 -20 V, +20 V Enhancement 4.5V 2.5V 5 W Single 1
RS Stock No. 688-7020
Mfr. Part No.IRFP4768PBF
BrandInfineon
$11.96
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N 93 A 250 V 14.5 mΩ TO-247AC Through Hole 3 -20 V, +20 V Enhancement 5V 3V 520 W Single 1
RS Stock No. 541-1613
Mfr. Part No.IRFU120NPBF
BrandInfineon
$1.28
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N 9.4 A 100 V 210 mΩ IPAK (TO-251) Through Hole 3 -20 V, +20 V Enhancement 4V 2V 48 W Single 1
New
RS Stock No. 214-4318
Mfr. Part No.BSC014N04LSIATMA1
BrandInfineon
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N 195 A 40 V 0.002 Ω SuperSO8 5x6 Surface Mount 8 - - 2.2V - - - 1
RS Stock No. 102-3533
Mfr. Part No.STD20NF06T4
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N 24 A 60 V 40 mΩ DPAK (TO-252) Surface Mount 3 -20 V, +20 V Enhancement 4V 2V 60 W Single 1
RS Stock No. 153-0729
Mfr. Part No.PMV100ENEAR
BrandNexperia
$0.188
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N 3 A 30 V 118 mΩ SOT23, TO-236AB Surface Mount 3 20 V Enhancement 2.5V 1V 4.5 W Single 3
RS Stock No. 182-7286
Mfr. Part No.DMP1009UFDF-7
$0.579
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P 8.7 (State) A, 11 (Steady) A 12 V 30 mΩ U-DFN2020 Surface Mount 6 ±8 V Enhancement 1V 0.3V 2 W Single 1
RS Stock No. 168-5901
Mfr. Part No.STW48N60DM2
$10.84
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N 40 A 600 V 79 mΩ TO-247 Through Hole 3 -25 V, +25 V Enhancement 5V 3V 300 W Single 1
RS Stock No. 800-9484
Mfr. Part No.ATP106-TL-H
$1.365
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P 30 A 40 V 41 mΩ ATPAK Surface Mount 3 -20 V, +20 V Enhancement 2.6V - 40 W Single 1
RS Stock No. 822-2542
Mfr. Part No.DMN2016UTS-13
$0.763
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N 8.6 A 20 V 16.5 mΩ TSSOP Surface Mount 8 -8 V, +8 V Enhancement 1V - 880 mW Isolated 2
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Mfr. Part No.IPP90R800C3XKSA1
BrandInfineon
$3.157
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N 6.9 A 900 V 800 mΩ TO-220 Through Hole 3 -30 V, +30 V Enhancement 3.5V 2.5V 104 W Single 1
New
RS Stock No. 213-9147
Mfr. Part No.DMHT10H032LFJ-13
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N 6 A 100 V 0.033 O V-DFN5045-12 - 12 - Enhancement 2.5V - - - 1
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BrandVishay
$0.478
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RS Stock No. 792-5892
Mfr. Part No.STL30N10F7
$2.40
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N 30 A 100 V 35 mΩ PowerFLAT Surface Mount 8 -20 V, +20 V Enhancement 4.5V 2.5V 75 W Single 1
RS Stock No. 165-8245
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BrandInfineon
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N 162 A 40 V 4 mΩ D2PAK (TO-263) Surface Mount 3 -20 V, +20 V Enhancement 4V 2V 3.8 W Single 1
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BrandInfineon
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N 51 A 55 V 13.5 mΩ D2PAK (TO-263) Surface Mount 3 -16 V, +16 V Enhancement 3V 1V 80 W Single 1
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N 1.2 A 30 V 160 mΩ SOT-23 Surface Mount 3 -20 V, +20 V Enhancement - 0.8V 500 mW Single 1