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. 169-7464
Mfr. Part No.DMN2041LSD-13
$0.267
Each (On a Reel of 2500)
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N 7.6 A 20 V 41 mΩ 1.2V - -12 V, +12 V SOIC Surface Mount 8 Isolated Enhancement Power MOSFET 1.16 W
RS Stock No. 166-2740
Mfr. Part No.FDC6303N
$0.232
Each (On a Reel of 3000)
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N 680 mA 25 V 450 mΩ - 0.65V +8 V SOT-23 Surface Mount 6 Isolated Enhancement Power MOSFET 900 mW
RS Stock No. 177-9705
Mfr. Part No.VN0300L-G
$1.418
Each (In a Bag of 1000)
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N 640 mA 30 V 3.3 Ω 2.5V 0.8V 30 V TO-92 Through Hole 3 Single Enhancement Driver MOSFET 1 W
RS Stock No. 162-8528
Mfr. Part No.CSD16322Q5C
$1.323
Each (On a Reel of 2500)
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N 21 A 25 V 7.2 mΩ 1.4V 0.9V -8 V, +10 V SON Surface Mount 8 Single Enhancement Power MOSFET 3.1 W
New
RS Stock No. 188-8293
Mfr. Part No.STL40DN3LLH5
$0.851
Each (On a Reel of 3000)
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- - - - - - - - - - - - - -
RS Stock No. 768-9310
Mfr. Part No.SIHB30N60E-GE3
BrandVishay
$5.02
Each
units
N 29 A 600 V 125 mΩ - 2V -20 V, +20 V D2PAK (TO-263) Surface Mount 3 Single Enhancement Power MOSFET 250 W
RS Stock No. 165-5159
Mfr. Part No.IPI037N08N3GXKSA1
BrandInfineon
$3.12
Each (In a Tube of 50)
units
N 100 A 80 V 3.5 mΩ 3.5V 2V -20 V, +20 V I2PAK (TO-262) Through Hole 3 Single Enhancement Power MOSFET 214 W
RS Stock No. 165-5339
Mfr. Part No.AUIRFN8403TR
BrandInfineon
$1.762
Each (On a Reel of 4000)
units
N 123 A 40 V 3.3 mΩ 3.9V 2.6V -20 V, +20 V PQFN Surface Mount 8 Single Enhancement Power MOSFET 94 W
RS Stock No. 168-7617
Mfr. Part No.STF38N65M5
$6.115
Each (In a Tube of 50)
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N 30 A 710 V 95 mΩ 5V 3V -25 V, +25 V TO-220FP Through Hole 3 Single Enhancement Power MOSFET 35 W
RS Stock No. 671-0841
Mfr. Part No.FDY3000NZ
$0.232
Each (In a Pack of 20)
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N 600 mA 20 V 700 mΩ - 0.6V -12 V, +12 V SOT-523 (SC-89) Surface Mount 6 Isolated Enhancement Power MOSFET 625 mW
RS Stock No. 163-2686
Mfr. Part No.NTMFS5832NLT1G
$0.555
Each (On a Reel of 1500)
units
N 110 A 40 V 6.5 mΩ 3V - -20 V, +20 V SO-8FL Surface Mount 8 Single Enhancement Power MOSFET 96 W
RS Stock No. 165-7250
Mfr. Part No.SI4186DY-T1-GE3
BrandVishay
$0.86
Each (On a Reel of 2500)
units
N 36 A 20 V 3.2 mΩ - 1.2V -20 V, +20 V SOIC Surface Mount 8 Single Enhancement Power MOSFET 6 W
RS Stock No. 166-1890
Mfr. Part No.FQPF3N80C
$1.192
Each (In a Tube of 50)
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N 3 A 800 V 4.8 Ω - 3V -30 V, +30 V TO-220F Through Hole 3 Single Enhancement Power MOSFET 39 W
RS Stock No. 687-5172
Mfr. Part No.STB9NK60ZT4
$1.482
Each (In a Pack of 5)
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N 7 A 600 V 950 mΩ 4.5V 3V -30 V, +30 V D2PAK (TO-263) Surface Mount 3 Single Enhancement Power MOSFET 125 W
RS Stock No. 814-1279
Mfr. Part No.SIR424DP-T1-GE3
BrandVishay
$1.046
Each (In a Pack of 20)
units
N 23 A 20 V 7.4 mΩ - 1V -20 V, +20 V PowerPAK SO Surface Mount 8 Single Enhancement Power MOSFET 41.7 W
RS Stock No. 827-0484
Mfr. Part No.DMN4026SSD-13
$0.724
Each (In a Pack of 10)
units
N 9 A 40 V 32 mΩ 3V - -20 V, +20 V SOIC Surface Mount 8 Isolated Enhancement Power MOSFET 1.8 W
RS Stock No. 165-7238
Mfr. Part No.SIR412DP-T1-GE3
BrandVishay
$0.573
Each (On a Reel of 3000)
units
N 13.4 A 25 V 15 mΩ - 1.2V -20 V, +20 V PowerPAK SO Surface Mount 8 Single Enhancement Power MOSFET 15.6 W
RS Stock No. 168-4816
Mfr. Part No.IXTK120N65X2
BrandIXYS
$30.246
Each (In a Tube of 25)
units
N 120 A 650 V 23 mΩ 5V 3V -30 V, +30 V TO-264P Through Hole 3 Single Enhancement Power MOSFET 1.25 kW
RS Stock No. 171-2469
Mfr. Part No.TK4R3E06PL
BrandToshiba
$2.732
Each (In a Pack of 5)
units
N 80 A 60 V 7.2 mΩ 2.5V 1.5V ±20 V TO-220 Surface Mount 3 Single Enhancement - 87 W
New
RS Stock No. 178-4252
Mfr. Part No.NTB082N65S3F
$6.263
Each (On a Reel of 800)
units
N 40 A 650 V 82 mΩ 5V 3V ±30 V TO-263 Surface Mount 3 Single Enhancement Power MOSFET 313 W
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