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. 485-7901
Mfr. Part No.STP80PF55
$5.23
Each
units
P 80 A 55 V 18 mΩ 4V 2V -16 V, +16 V TO-220 Through Hole 3 Single Enhancement Power MOSFET 300 W
RS Stock No. 542-9440
Mfr. Part No.IRF840APBF
BrandVishay
$2.78
Each
units
N 8 A 500 V 850 mΩ - 2V -30 V, +30 V TO-220AB Through Hole 3 Single Enhancement Power MOSFET 125 W
RS Stock No. 124-8828
Mfr. Part No.SPP80P06PHXKSA1
BrandInfineon
$2.581
Each (In a Tube of 50)
units
P 80 A 60 V 23 mΩ 4V 2.1V -20 V, +20 V TO-220 Through Hole 3 Single Enhancement Power MOSFET 340 W
RS Stock No. 761-2745
Mfr. Part No.STF11NM60ND
$6.79
Each
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N 10 A 600 V 450 mΩ 5V 3V -25 V, +25 V TO-220FP Through Hole 3 Single Enhancement Power MOSFET 25 W
RS Stock No. 541-1180
Mfr. Part No.IRF520NPBF
BrandInfineon
$1.94
Each
units
N 9.7 A 100 V 200 mΩ 4V 2V -20 V, +20 V TO-220AB Through Hole 3 Single Enhancement Power MOSFET 48 W
RS Stock No. 168-7567
Mfr. Part No.STF11NM60ND
$2.243
Each (In a Tube of 50)
units
N 10 A 600 V 450 mΩ 5V 3V -25 V, +25 V TO-220FP Through Hole 3 Single Enhancement Power MOSFET 25 W
RS Stock No. 914-0194
Mfr. Part No.SPP80P06PHXKSA1
BrandInfineon
$4.184
Each (In a Pack of 5)
units
P 80 A 60 V 23 mΩ 4V 2.1V -20 V, +20 V TO-220 Through Hole 3 Single Enhancement Power MOSFET 340 W
RS Stock No. 919-4876
Mfr. Part No.IRF520NPBF
BrandInfineon
$1.184
Each (In a Tube of 50)
units
N 9.7 A 100 V 200 mΩ 4V 2V -20 V, +20 V TO-220AB Through Hole 3 Single Enhancement - 48 W
RS Stock No. 922-7831
Mfr. Part No.BS250P
$0.474
Each (In a Bag of 4000)
units
P 230 mA 45 V 14 Ω 3.5V - -20 V, +20 V E-Line Through Hole 3 Single Enhancement Small Signal 700 mW
RS Stock No. 911-4836
Mfr. Part No.SPP20N60C3HKSA1
BrandInfineon
$3.859
Each (In a Tube of 50)
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N 20.7 A 600 V 190 mΩ 3.9V 2.1V -20 V, +20 V TO-220AB Through Hole 3 Single Enhancement - 208 W
RS Stock No. 798-2962
Mfr. Part No.PSMN4R3-30PL,127
BrandNexperia
$1.17
Each (In a Pack of 5)
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N 100 A 30 V 4.3 mΩ 2.15V 1.3V -20 V, +20 V TO-220AB Through Hole 3 Single Enhancement - 103 W
RS Stock No. 215-6688
Mfr. Part No.BS250P
$1.292
Each (In a Pack of 5)
units
P 230 mA 45 V 14 Ω 3.5V - -20 V, +20 V E-Line Through Hole 3 Single Enhancement Small Signal 700 mW
RS Stock No. 145-9316
Mfr. Part No.IRL40S212
BrandInfineon
$3.445
Each (In a Tube of 50)
units
N 414 A 40 V 1.25 mΩ 2.4V 1V -20 V, +20 V TO-220 Through Hole 3 Single Enhancement Power MOSFET 375 W
RS Stock No. 166-0023
Mfr. Part No.PSMN4R3-30PL,127
BrandNexperia
$0.985
Each (On a Reel of 1000)
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N 100 A 30 V 4.3 mΩ 2.15V 1.3V -20 V, +20 V TO-220AB Through Hole 3 Single Enhancement - 103 W
RS Stock No. 166-1092
Mfr. Part No.IPD220N06L3GBTMA1
BrandInfineon
$0.381
Each (On a Reel of 2500)
units
N 30 A 60 V 39.8 mΩ 2.2V 1.2V -20 V, +20 V DPAK (TO-252) Surface Mount 3 Single Enhancement Power MOSFET 36 W
RS Stock No. 896-7349
Mfr. Part No.IRL40S212
BrandInfineon
$4.834
Each (In a Pack of 5)
units
N 414 A 40 V 1.25 mΩ 2.4V 1V -20 V, +20 V TO-220 Through Hole 3 Single Enhancement Power MOSFET 375 W
RS Stock No. 462-3376
Mfr. Part No.SPP20N60C3HKSA1
BrandInfineon
$6.49
Each
units
N 21 A 600 V 190 mΩ 3.9V 2.1V -20 V, +20 V TO-220AB Through Hole 3 Single Enhancement - 208 W
RS Stock No. 110-7435
Mfr. Part No.IPD220N06L3GBTMA1
BrandInfineon
$0.471
Each (In a Pack of 50)
units
N 30 A 60 V 39.8 mΩ 2.2V 1.2V -20 V, +20 V DPAK (TO-252) Surface Mount 3 Single Enhancement Power MOSFET 36 W
RS Stock No. 892-2217
Mfr. Part No.BSS84PH6327XTSA2
BrandInfineon
$0.06
Each (In a Pack of 250)
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P 170 mA 60 V 12 Ω 2V 1V -20 V, +20 V SOT-23 Surface Mount 3 Single Enhancement - 360 mW
RS Stock No. 540-9783
Mfr. Part No.IRF3205PBF
BrandInfineon
$3.91
Each
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N 110 A 55 V 8 mΩ 4V 2V -20 V, +20 V TO-220AB Through Hole 3 Single Enhancement Power MOSFET 200 W
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