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. 725-9353
Mfr. Part No.IRLML2030TRPBF
BrandInfineon
$0.504
Each (In a Pack of 20)
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N 2.7 A 30 V 100 mΩ SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 2.3V 1.3V 1.3 W Single 1
RS Stock No. 919-4227
Mfr. Part No.SI4056DY-T1-GE3
BrandVishay
$0.526
Each (On a Reel of 2500)
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N 11.1 A 100 V 31 mΩ SOIC Surface Mount 8 -20 V, +20 V Enhancement - 1.5V 5.7 W Single 1
RS Stock No. 796-5128
Mfr. Part No.TPC8227-H,LQ(S
BrandToshiba
$0.778
Each (In a Pack of 5)
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N 5.1 A 40 V 40 mΩ SOP Surface Mount 8 -20 V, +20 V Enhancement 2.3V - 1.5 W Isolated 2
RS Stock No. 671-0889
Mfr. Part No.FQB33N10TM
$2.356
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N 33 A 100 V 52 mΩ D2PAK (TO-263) Surface Mount 3 -25 V, +25 V Enhancement - 2V 3.75 W Single 1
RS Stock No. 823-2927
Mfr. Part No.DMN2004DMK-7
$0.566
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N 540 mA 20 V 900 mΩ SOT-26 Surface Mount 6 -8 V, +8 V Enhancement 1V - 225 mW Isolated 2
RS Stock No. 189-0262
Mfr. Part No.NTMYS1D2N04CLTWG
$1.70
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N 258 A 40 V 1.7 mΩ LFPAK Surface Mount 8 ±20 V Enhancement 2V 1.2V 134 W Single 1
RS Stock No. 783-2958
Mfr. Part No.STF31N65M5
$5.27
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N 22 A 710 V 148 mΩ TO-220FP Through Hole 3 -25 V, +25 V Enhancement 5V 3V 30 W Single 1
RS Stock No. 761-0011
Mfr. Part No.STP14NM50N
$4.90
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N 12 A 500 V 320 mΩ TO-220 Through Hole 3 -25 V, +25 V Enhancement 4V 2V 90 W Single 1
RS Stock No. 768-9332
Mfr. Part No.SiHG47N60E-GE3
BrandVishay
$17.24
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N 47 A 600 V 64 mΩ TO-247AC Through Hole 3 -20 V, +20 V Enhancement - 2V 357 W Single 1
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RS Stock No. 218-3086
Mfr. Part No.IPW60R180P7XKSA1
BrandInfineon
$2.696
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N 18 A 600 V 0.18 Ω PG-TO 247-3 Through Hole 3 - - 4V - - - 1
RS Stock No. 178-3956
Mfr. Part No.SQS944ENW-T1_GE3
$1.144
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N 6 A 40 V 40 mΩ 1212 Surface Mount 8 ±20 V Enhancement 2.5V 1.5V 27.8 W - 2
RS Stock No. 827-3978
Mfr. Part No.IRFI4321PBF
BrandInfineon
$4.81
Each (In a Pack of 2)
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N 34 A 150 V 16 mΩ TO-220FP Through Hole 3 -30 V, +30 V Enhancement 5V 3V 46 W Single 1
RS Stock No. 178-0831
Mfr. Part No.IRF740APBF
BrandVishay
$3.207
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N 10 A 400 V 550 mΩ TO-220AB Through Hole 3 -30 V, +30 V Enhancement - 2V 125 W Single 1
RS Stock No. 829-1504
Mfr. Part No.STW33N60M2
$7.84
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N 26 A 650 V 125 mΩ TO-247 Through Hole 3 -25 V, +25 V Enhancement 4V 2V 190 W Single 1
RS Stock No. 776-9175
Mfr. Part No.IRFB7434PBF
BrandInfineon
$4.20
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N 195 A 40 V 1.6 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 3.9V 2.2V 294 W Single 1
RS Stock No. 145-4370
Mfr. Part No.FDPF12N50FT
$2.47
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N 11.5 A 500 V 700 mΩ TO-220F Through Hole 3 -30 V, +30 V Enhancement - 3V 42 W Single 1
RS Stock No. 171-2432
Mfr. Part No.TPH1R204PL
BrandToshiba
$1.587
Each (On a Reel of 5000)
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N 150 A 40 V 2.1 mΩ SOP Surface Mount 8 ±20 V Enhancement 2.4V 1.4V 132 W Single 1
RS Stock No. 188-8440
Mfr. Part No.STD5N80K5
$1.998
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N 4 A - 1.73 Ω DPAK Surface Mount 3 ±30 V Enhancement 5V 3V 60 W Single 1
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$8.36
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- - - - TO-220-2L Through Hole 2 + Tab - - - - 115 W Single 1
RS Stock No. 798-2974
Mfr. Part No.PSMN4R5-40BS,118
BrandNexperia
$2.086
Each (In a Pack of 5)
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N 100 A 40 V 6.5 mΩ D2PAK (TO-263) Surface Mount 3 -20 V, +20 V Enhancement 4V 2V 148 W Single 1