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 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. 165-4217
Mfr. Part No.VN2222LL-G
BrandMicrochip
PHP11.08
Each (In a Bag of 1000)
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N 230 mA 60 V 7.5 Ω TO-92 Through Hole 3 -30 V, +30 V Enhancement 2.5V - 1 W Single 1
RS Stock No. 879-3274
Mfr. Part No.VN2222LL-G
BrandMicrochip
PHP13.427
Each (In a Pack of 25)
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N 230 mA 60 V 7.5 Ω TO-92 Through Hole 3 -30 V, +30 V Enhancement 2.5V - 1 W Single 1
RS Stock No. 170-4342
Mfr. Part No.LND150N3-G
BrandMicrochip
PHP17.906
Each (In a Bag of 1000)
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- - - - - - - - - - - - - -
RS Stock No. 829-3250
Mfr. Part No.LND150N3-G
BrandMicrochip
PHP23.52
Each (In a Pack of 20)
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N 30 mA 500 V 1 kΩ TO-92 Through Hole 3 -20 V, +20 V Depletion 3V - 740 mW Single 1
RS Stock No. 170-4348
Mfr. Part No.DN3545N3-G
BrandMicrochip
PHP26.859
Each (In a Bag of 1000)
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- - - - - - - - - - - - - -
RS Stock No. 178-5338
Mfr. Part No.LND01K1-G
BrandMicrochip
PHP16.853
Each (On a Reel of 3000)
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N 330 mA 9 V 1.4 Ω SOT-23 Surface Mount 5 -12 V, +0.6 V Depletion - - 360 mW Single 1
RS Stock No. 829-3358
Mfr. Part No.DN3545N3-G
BrandMicrochip
PHP31.836
Each (In a Pack of 10)
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N 130 mA 450 V 20 Ω TO-92 Through Hole 3 -20 V, +20 V Depletion 3.5V - 740 mW Single 1
RS Stock No. 912-5259
Mfr. Part No.LND01K1-G
BrandMicrochip
PHP18.427
Each (In a Pack of 25)
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N 330 mA 9 V 1.4 Ω SOT-23 Surface Mount 5 -12 V, +0.6 V Depletion - - 360 mW Single 1
RS Stock No. 178-5359
Mfr. Part No.DN3765K4-G
BrandMicrochip
PHP97.955
Each (On a Reel of 2000)
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N 300 mA 650 V 8 Ω DPAK (TO-252) Surface Mount 3 -20 V, +20 V Depletion 3.5V - 2.5 W Single 1
RS Stock No. 170-4346
Mfr. Part No.DN2530N3-G
BrandMicrochip
PHP23.699
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RS Stock No. 829-3360
Mfr. Part No.DN3765K4-G
BrandMicrochip
PHP124.35
Each (In a Pack of 5)
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N 300 mA 650 V 8 Ω DPAK (TO-252) Surface Mount 3 -20 V, +20 V Depletion 3.5V - 2.5 W Single 1
RS Stock No. 829-3244
Mfr. Part No.DN2540N5-G
BrandMicrochip
PHP68.51
Each (In a Pack of 5)
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N 500 mA 400 V 25 Ω TO-220 Through Hole 3 -20 V, +20 V Depletion 3.5V - 15 W Single 1
RS Stock No. 829-3320
Mfr. Part No.DN2530N3-G
BrandMicrochip
PHP31.19
Each (In a Pack of 10)
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N 175 mA 300 V 12 Ω TO-92 Through Hole 3 -20 V, +20 V Depletion 3.5V - 740 mW Single 1
RS Stock No. 178-4924
Mfr. Part No.DN2540N5-G
BrandMicrochip
PHP57.409
Each (In a Tube of 50)
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N 500 mA 400 V 25 Ω TO-220 Through Hole 3 -20 V, +20 V Depletion 3.5V - 15 W Single 1
RS Stock No. 829-3253
Mfr. Part No.LND150N8-G
BrandMicrochip
PHP31.19
Each (In a Pack of 20)
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N 30 mA 500 V 1 kΩ TO-243AA Surface Mount 4 -20 V, +20 V Depletion 3V - 1.6 W Single 1
RS Stock No. 177-9865
Mfr. Part No.VN0104N3-G
BrandMicrochip
PHP28.10
Each (In a Pack of 20)
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N 350 mA 40 V 5 Ω TO-92 Through Hole 3 20 V Enhancement 2.4V 0.8V 1 W Single 1
RS Stock No. 177-9734
Mfr. Part No.TN0106N3-G
BrandMicrochip
PHP36.25
Each (In a Pack of 20)
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N 350 mA 60 V 4.5 Ω TO-92 Through Hole 3 20 V Enhancement 2V 0.6V 1 W Single 1
RS Stock No. 177-9724
Mfr. Part No.VN2106N3-G
BrandMicrochip
PHP16.22
Each (In a Pack of 25)
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N 300 mA 60 V 6 Ω TO-92 Through Hole 3 20 V Enhancement 2.4V 0.8V 1 W Single 1
RS Stock No. 911-3357
Mfr. Part No.MIC94053YC6-TR
BrandMicrochip
PHP28.63
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P 2 A 6 V 180 mΩ SOT-363 (SC-70) Surface Mount 6 -6 V Enhancement 1.2V 0.5V 270 mW Single 1
RS Stock No. 177-9842
Mfr. Part No.TN2106K1-G
BrandMicrochip
PHP22.95
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N 280 mA 60 V 5 Ω TO-236AB Surface Mount 3 20 V Enhancement 2V 0.6V 360 mW Single 1