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 Maximum Gate Threshold Voltage Minimum Gate Threshold Voltage Maximum Gate Source Voltage Package Type Mounting Type Pin Count Transistor Configuration Channel Mode Category Maximum Power Dissipation
RS Stock No. 462-3449
Mfr. Part No.SPW20N60C3FKSA1
BrandInfineon
$8.11
Each
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N 21 A 650 V 190 mΩ 3.9V 2.1V -20 V, +20 V TO-247 Through Hole 3 Single Enhancement Power MOSFET 208 W
RS Stock No. 911-4830
Mfr. Part No.SPW20N60C3FKSA1
BrandInfineon
$6.89
Each (In a Tube of 30)
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N 20.7 A 650 V 190 mΩ 3.9V 2.1V -20 V, +20 V TO-247 Through Hole 3 Single Enhancement - 208 W
RS Stock No. 920-8795
Mfr. Part No.STP55NF06L
$0.637
Each (In a Tube of 50)
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N 55 A 60 V 18 mΩ - 1V -16 V, +16 V TO-220 Through Hole 3 Single Enhancement - 95 W
RS Stock No. 919-4817
Mfr. Part No.IRF640NPBF
BrandInfineon
$1.25
Each (In a Tube of 50)
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N 18 A 200 V 150 mΩ 4V 2V -20 V, +20 V TO-220AB Through Hole 3 Single Enhancement - 150 W
RS Stock No. 485-7585
Mfr. Part No.STP30NF10
$1.776
Each (In a Pack of 5)
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N 35 A 100 V 45 mΩ 4V 2V -20 V, +20 V TO-220 Through Hole 3 Single Enhancement Power MOSFET 115 W
RS Stock No. 541-1247
Mfr. Part No.IRLZ34NPBF
BrandInfineon
$2.01
Each
units
N 30 A 55 V 35 mΩ 2V 1V -16 V, +16 V TO-220AB Through Hole 3 Single Enhancement Power MOSFET 68 W
RS Stock No. 919-4898
Mfr. Part No.IRLZ34NPBF
BrandInfineon
$0.91
Each (In a Tube of 50)
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N 30 A 55 V 35 mΩ 2V 1V -16 V, +16 V TO-220AB Through Hole 3 Single Enhancement - 68 W
RS Stock No. 485-7721
Mfr. Part No.STP55NF06L
$2.70
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N 55 A 60 V 18 mΩ - 1V -16 V, +16 V TO-220 Through Hole 3 Single Enhancement Power MOSFET 95 W
RS Stock No. 725-9325
Mfr. Part No.IRLB8743PBF
BrandInfineon
$2.106
Each (In a Pack of 5)
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N 150 A 30 V 3 mΩ 2.35V 1.35V -20 V, +20 V TO-220AB Through Hole 3 Single Enhancement Power MOSFET 140 W
RS Stock No. 913-4045
Mfr. Part No.IRLB8743PBF
BrandInfineon
$1.305
Each (In a Tube of 50)
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N 150 A 30 V 3 mΩ 2.35V 1.35V -20 V, +20 V TO-220AB Through Hole 3 Single Enhancement - 140 W
RS Stock No. 168-6102
Mfr. Part No.STP30NF10
$0.813
Each (In a Tube of 50)
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N 35 A 100 V 45 mΩ 4V 2V -20 V, +20 V TO-220 Through Hole 3 Single Enhancement Power MOSFET 115 W
RS Stock No. 541-0014
Mfr. Part No.IRF640NPBF
BrandInfineon
$2.84
Each
units
N 18 A 200 V 150 mΩ 4V 2V -20 V, +20 V TO-220AB Through Hole 3 Single Enhancement Power MOSFET 150 W
RS Stock No. 650-4643
Mfr. Part No.IRLU9343PBF
BrandInfineon
$2.338
Each (In a Pack of 5)
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P 20 A 55 V 105 mΩ 1V 1V -20 V, +20 V IPAK (TO-251) Through Hole 3 Single Enhancement Power MOSFET 79 W
RS Stock No. 124-9058
Mfr. Part No.IPP80P03P4L04AKSA1
BrandInfineon
$1.872
Each (In a Tube of 50)
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P 80 A 30 V 7 mΩ 2V 1V -16 V, +5 V TO-220 Through Hole 3 Single Enhancement Power MOSFET 137 W
RS Stock No. 103-1080
Mfr. Part No.STP80PF55
$2.19
Each (In a Tube of 50)
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P 80 A 55 V 18 mΩ 4V 2V -16 V, +16 V TO-220 Through Hole 3 Single Enhancement - 300 W
RS Stock No. 178-0835
Mfr. Part No.IRF840APBF
BrandVishay
$2.02
Each (In a Tube of 50)
units
- - - - - - - - - - - - - -
RS Stock No. 807-5910
Mfr. Part No.FQPF9N50CF
$2.57
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N 9 A 500 V 850 mΩ - 2V -30 V, +30 V TO-220F Through Hole 3 Single Enhancement Power MOSFET 44 W
RS Stock No. 145-4614
Mfr. Part No.FQPF9N50CF
$1.216
Each (In a Tube of 50)
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N 9 A 500 V 850 mΩ - 2V -30 V, +30 V TO-220F Through Hole 3 Single Enhancement - 44 W
RS Stock No. 823-5554
Mfr. Part No.IPP80P03P4L04AKSA1
BrandInfineon
$3.062
Each (In a Pack of 5)
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P 80 A 30 V 7 mΩ 2V 1V -16 V, +5 V TO-220 Through Hole 3 Single Enhancement Power MOSFET 137 W
RS Stock No. 178-1510
Mfr. Part No.IRLU9343PBF
BrandInfineon
$1.54
Each (In a Tube of 75)
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