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. 177-6744
Mfr. Part No.RS1E260ATTB1
BrandROHM
$4.41
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P 80 A 30 V 3.1 mΩ HSOP Surface Mount 8 ±20 V Enhancement 2.5V 1V 40 W Single 1
RS Stock No. 879-3328
Mfr. Part No.IRFB7740PBF
BrandInfineon
$1.794
Each (In a Pack of 10)
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N 87 A 75 V 7.3 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 3.7V 2.1V 143 W Single 1
RS Stock No. 205-2431
Mfr. Part No.NTTFS1D8N02P1E
$0.933
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N 150 A 25 V 1.3 mΩ PQFN8 - 8 - Enhancement 2V - - - 1
RS Stock No. 168-6702
Mfr. Part No.STW5NK100Z
$4.136
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N 3.5 A 1000 V 3.7 Ω TO-247 Through Hole 3 -30 V, +30 V Enhancement 4.5V 3V 125 W Single 1
RS Stock No. 202-5703
Mfr. Part No.NTH4L160N120SC1
$17.52
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N 17.3 A 1200 V 0.224 Ω TO-247 - 4 - Enhancement 4.3V - - - 1
RS Stock No. 178-3668
Mfr. Part No.SiA110DJ-T1-GE3
$0.581
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N 12 A 100 V 70 mΩ SC-70 Surface Mount 6 ±20 V Enhancement 4V 2V 19 W Single 1
RS Stock No. 822-2582
Mfr. Part No.DMN5L06TK-7
$0.582
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N 280 mA 50 V 3 Ω SOT-523 (SC-89) Surface Mount 3 -20 V, +20 V Enhancement 1.2V - 150 mW Single 1
RS Stock No. 170-2269
Mfr. Part No.IPP075N15N3GXKSA1
BrandInfineon
$6.62
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N 100 A 150 V 7.7 mΩ TO-220 Through Hole 3 + Tab 20 V Enhancement 4V 2V 300 W Single 1
RS Stock No. 919-4873
Mfr. Part No.IRFP150NPBF
BrandInfineon
$2.39
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N 42 A 100 V 36 mΩ TO-247AC Through Hole 3 -20 V, +20 V Enhancement 4V 2V 160 W Single 1
RS Stock No. 710-4736
Mfr. Part No.SI4840BDY-T1-GE3
BrandVishay
$2.39
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N 10 A 40 V 9 mΩ SOIC Surface Mount 8 -20 V, +20 V Enhancement - 1V 1.56 W Single 1
RS Stock No. 168-7929
Mfr. Part No.IRF7309TRPBF
BrandInfineon
$0.55
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N, P 3 A, 4 A 30 V 80 mΩ, 160 mΩ SOIC Surface Mount 8 -20 V, +20 V Enhancement 1V 1V 1.4 W Isolated 2
RS Stock No. 168-4472
Mfr. Part No.IXFH69N30P
BrandIXYS
$12.695
Each (In a Tube of 30)
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N 69 A 300 V 49 mΩ TO-247 Through Hole 3 -20 V, +20 V Enhancement 5V - 500 W Single 1
RS Stock No. 787-1017
Mfr. Part No.AUIRFS8408
BrandInfineon
$6.045
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N 195 A, 317 A 40 V 1.6 mΩ D2PAK (TO-263) Surface Mount 3 -20 V, +20 V Enhancement 3.9V 2.2V 294 W Single 1
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RS Stock No. 215-2574
Mfr. Part No.IRF250P225
BrandInfineon
$6.925
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N 69 A 250 V 0.022 Ω TO-247 Through Hole 3 - Enhancement 4V - - - 1
RS Stock No. 168-4757
Mfr. Part No.IXFN132N50P3
BrandIXYS
$40.845
Each (In a Tube of 10)
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N 112 A 500 V 39 mΩ SOT-227B Panel Mount 4 -30 V, +30 V Enhancement 5V - 1.5 kW Single 1
RS Stock No. 687-5308
Mfr. Part No.STP15NK50ZFP
$6.61
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N 14 A 500 V 340 mΩ TO-220FP Through Hole 3 -30 V, +30 V Enhancement 4.5V 3V 40 W Single 1
RS Stock No. 671-0362
Mfr. Part No.FDG8850NZ
$0.761
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N 750 mA 30 V 400 mΩ SOT-363 (SC-70) Surface Mount 6 -12 V, +12 V Enhancement - 0.65V 360 mW Isolated 2
RS Stock No. 151-3171
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BrandNexperia
$0.509
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N 4.7 A 20 V 70 mΩ SOT23, TO-236AB Surface Mount 3 8 V Enhancement 1V 0.45V 3.9 W Single 3
RS Stock No. 671-5060
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$4.054
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N 25 A 250 V 110 mΩ TO-220AB Through Hole 3 -30 V, +30 V Enhancement - 3V 180 W Single 1
RS Stock No. 543-1667
Mfr. Part No.IRFR014PBF
BrandVishay
$1.712
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N 7.7 A 60 V 200 mΩ DPAK (TO-252) Surface Mount 3 -20 V, +20 V Enhancement - 2V 2.5 W Single 1