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. 913-4036
Mfr. Part No.IRLB8721PBF
BrandInfineon
$1.25
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N 62 A 30 V 9 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 2.35V 1.35V 65 W Single 1
RS Stock No. 780-4727
Mfr. Part No.NTMS4816NR2G
$0.875
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N 11 A 30 V 16 mΩ SOIC Surface Mount 8 -20 V, +20 V Enhancement 3V - 2.04 W Single 1
RS Stock No. 124-1400
Mfr. Part No.FQP30N06L
$1.841
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N 32 A 60 V 45 mΩ TO-220 Through Hole 3 -20 V, +20 V Enhancement - 1V 79 W Single 1
RS Stock No. 725-9322
Mfr. Part No.IRLB8721PBF
BrandInfineon
$1.654
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N 62 A 30 V 9 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 2.35V 1.35V 65 W Single 1
RS Stock No. 787-0982
Mfr. Part No.AUIRFR8403
BrandInfineon
$2.866
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N 100 A, 127 A 40 V 3.1 mΩ DPAK (TO-252) Surface Mount 3 -20 V, +20 V Enhancement 3.9V 2.2V 99 W Single 1
RS Stock No. 807-5863
Mfr. Part No.FQP30N06L
$2.166
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N 32 A 60 V 45 mΩ TO-220 Through Hole 3 -20 V, +20 V Enhancement - 1V 79 W Single 1
RS Stock No. 166-2631
Mfr. Part No.FDS9926A
$0.326
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N 6.5 A 20 V 30 mΩ SOIC Surface Mount 8 -10 V, +10 V Enhancement - 0.6V 2 W Isolated 2
RS Stock No. 761-4542
Mfr. Part No.MTP3055VL
$2.51
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N 12 A 60 V 180 mΩ TO-220 Through Hole 3 -15 V, +15 V Enhancement - 1V 48 W Single 1
RS Stock No. 827-0490
Mfr. Part No.DMP3085LSD-13
$0.426
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P 3.1 A 30 V 95 mΩ SOIC Surface Mount 8 -20 V, +20 V Enhancement 3V - 1.7 W Isolated 2
RS Stock No. 124-9027
Mfr. Part No.IRLS3036-7PPBF
BrandInfineon
$8.404
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N 300 A 60 V 2 mΩ D2PAK (TO-263) Surface Mount 7 -16 V, +16 V Enhancement 2.5V 1V 380 W Single 1
RS Stock No. 688-7254
Mfr. Part No.IRLS3036-7PPBF
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$9.72
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N 300 A 60 V 2 mΩ D2PAK (TO-263) Surface Mount 7 -16 V, +16 V Enhancement 2.5V 1V 380 W Single 1
RS Stock No. 145-5555
Mfr. Part No.MTP3055VL
$2.069
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N 12 A 60 V 180 mΩ TO-220 Through Hole 3 -15 V, +15 V Enhancement - 1V 48 W Single 1
RS Stock No. 168-7931
Mfr. Part No.IRF7319TRPBF
BrandInfineon
$0.578
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N, P 4.9 A, 6.5 A 30 V 46 mΩ, 98 mΩ SOIC Surface Mount 8 -20 V, +20 V Enhancement 1V 1V 2 W Isolated 2
RS Stock No. 671-0769
Mfr. Part No.FDS9926A
$0.966
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N 6.5 A 20 V 30 mΩ SOIC Surface Mount 8 -10 V, +10 V Enhancement - 0.6V 2 W Isolated 2
RS Stock No. 122-3314
Mfr. Part No.DMP3085LSD-13
$0.149
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P 3.1 A 30 V 95 mΩ SOIC Surface Mount 8 -20 V, +20 V Enhancement 3V - 1.7 W Isolated 2
RS Stock No. 753-3068
Mfr. Part No.IPW60R070C6FKSA1
BrandInfineon
$13.76
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N 53 A 650 V 70 mΩ TO-247 Through Hole 3 -20 V, +20 V Enhancement 3.5V 2.5V 391 W Single 1
RS Stock No. 826-8879
Mfr. Part No.IRF7319TRPBF
BrandInfineon
$1.438
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N, P 4.9 A, 6.5 A 30 V 46 mΩ, 98 mΩ SOIC Surface Mount 8 -20 V, +20 V Enhancement 1V 1V 2 W Isolated 2
RS Stock No. 913-4733
Mfr. Part No.IRFP4868PBF
BrandInfineon
$8.295
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N 70 A 300 V 32 mΩ TO-247AC Through Hole 3 -20 V, +20 V Enhancement 5V 3V 517 W Single 1
RS Stock No. 540-9777
Mfr. Part No.IRFZ44NPBF
BrandInfineon
$1.99
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N 49 A 55 V 17.5 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 4V 2V 94 W Single 1
RS Stock No. 911-5025
Mfr. Part No.IPW60R070C6FKSA1
BrandInfineon
$11.24
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N 53 A 650 V 70 mΩ TO-247 Through Hole 3 -20 V, +20 V Enhancement 3.5V 2.5V 391 W Single 1