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.

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

N-Channel vs. P-Channel MOSFETs

MOSFETs are made of p-type or n-type doped silicon.

  • N-Channel MOSFETS contain additional electrons which are free to move around. They are the 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.

Where are MOSFETs used?

MOSFETs are found within many applications, such as microprocessors and other memory components. MOSFET transistors are most commonly used as a voltage-controlled switch within circuits.

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Description Price Channel Type Maximum Continuous Drain Current Maximum Drain Source Voltage Maximum Drain Source Resistance Package Type Maximum Gate Threshold Voltage Mounting Type Minimum Gate Threshold Voltage Pin Count Maximum Gate Source Voltage Channel Mode Maximum Power Dissipation Transistor Configuration Number of Elements per Chip
RS Stock No. 830-3307
Mfr. Part No.IRLL014NTRPBF
BrandInfineon
€0.454
Each (In a Pack of 25)
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N 2.8 A 55 V 280 mΩ SOT-223 2V Surface Mount 1V 3 + Tab -16 V, +16 V Enhancement 2.1 W Single 1
RS Stock No. 302-000
Mfr. Part No.IRLL014NPBF
BrandInfineon
€0.60
Each (In a Pack of 5)
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N 2.8 A 55 V 140 mΩ SOT-223 2V Surface Mount 1V 3 + Tab -16 V, +16 V Enhancement 2.1 W Single 1
RS Stock No. 166-1031
Mfr. Part No.IRLU120NPBF
BrandInfineon
€0.528
Each (In a Tube of 75)
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N 10 A 100 V 185 mΩ IPAK (TO-251) 2V Through Hole 1V 3 -16 V, +16 V Enhancement 48 W Single 1
RS Stock No. 543-1718
Mfr. Part No.IRLU120NPBF
BrandInfineon
€0.638
Each (In a Pack of 5)
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N 10 A 100 V 185 mΩ IPAK (TO-251) 2V Through Hole 1V 3 -16 V, +16 V Enhancement 48 W Single 1
RS Stock No. 913-4802
Mfr. Part No.IRLR2905TRPBF
BrandInfineon
€0.48
Each (On a Reel of 2000)
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N 42 A 55 V 40 mΩ DPAK (TO-252) 2V Surface Mount 1V 3 -16 V, +16 V Enhancement 110 W Single 1
RS Stock No. 541-1180
Mfr. Part No.IRF520NPBF
BrandInfineon
€2.18
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N 9.7 A 100 V 200 mΩ TO-220AB 4V Through Hole 2V 3 -20 V, +20 V Enhancement 48 W Single 1
RS Stock No. 671-4871
Mfr. Part No.FDP8880
€0.982
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N 11 A 30 V 12 mΩ TO-220AB - Through Hole 1.2V 3 -20 V, +20 V Enhancement 55 W Single 1
RS Stock No. 145-4518
Mfr. Part No.FDP8880
€0.839
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N 11 A 30 V 12 mΩ TO-220AB - Through Hole 1.2V 3 -20 V, +20 V Enhancement 55 W Single 1
RS Stock No. 919-0036
Mfr. Part No.IRF9530PBF
BrandVishay
€0.938
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P 12 A 100 V 300 mΩ TO-220AB - Through Hole 2V 3 -20 V, +20 V Enhancement 88 W Single 1
RS Stock No. 122-0594
Mfr. Part No.ZXMN3A06DN8TA
€0.55
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N 6.2 A 30 V 50 mΩ SOIC - Surface Mount 1V 8 -20 V, +20 V Enhancement 2.1 W Isolated 2
RS Stock No. 168-6099
Mfr. Part No.STP10NK60Z
€2.07
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N 10 A 600 V 750 mΩ TO-220 4.5V Through Hole 3V 3 -30 V, +30 V Enhancement 115 W Single 1
RS Stock No. 485-7412
Mfr. Part No.STP10NK60Z
€2.436
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N 10 A 600 V 750 mΩ TO-220 4.5V Through Hole 3V 3 -30 V, +30 V Enhancement 115 W Single 1
RS Stock No. 173-4053
Mfr. Part No.SI7469DP-T1-E3
€1.056
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P 28 A 80 V 29 mΩ PowerPAK SO - Surface Mount 1V 8 -20 V, +20 V Enhancement 83 W Single 1
RS Stock No. 830-3357
Mfr. Part No.IRLR2905TRPBF
BrandInfineon
€0.83
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N 42 A 55 V 40 mΩ DPAK (TO-252) 2V Surface Mount 1V 3 -16 V, +16 V Enhancement 110 W Single 1
RS Stock No. 485-7800
Mfr. Part No.STP60NF06
€1.10
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N 60 A 60 V 16 mΩ TO-220 4V Through Hole 2V 3 -20 V, +20 V Enhancement 150 W Single 1
RS Stock No. 708-4884
Mfr. Part No.IRLU110PBF
BrandVishay
€1.176
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N 4.3 A 100 V 540 mΩ IPAK (TO-251) - Through Hole 1V 3 -10 V, +10 V Enhancement 2.5 W Single 1
RS Stock No. 829-3250
Mfr. Part No.LND150N3-G
BrandMicrochip
€0.404
Each (In a Pack of 20)
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N 30 mA 500 V 1 kΩ TO-92 3V Through Hole - 3 -20 V, +20 V Depletion 740 mW Single 1
RS Stock No. 919-4858
Mfr. Part No.IRF9Z24NPBF
BrandInfineon
€0.618
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P 12 A 55 V 175 mΩ TO-220AB 4V Through Hole 2V 3 -20 V, +20 V Enhancement 45 W Single 1
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Mfr. Part No.IRF9Z24NPBF
BrandInfineon
€0.72
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P 12 A 55 V 175 mΩ TO-220AB 4V Through Hole 2V 3 -20 V, +20 V Enhancement 45 W Single 1
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N 45 A 100 V 18 mΩ DPAK (TO-252) 4.5V Surface Mount 2.5V 3 -20 V, +20 V Enhancement 60 W Single 1