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 Maximum Power Dissipation Automotive Standard
RS Stock No. 170-4342
Mfr. Part No.LND150N3-G
BrandMicrochip
$0.671
Each (In a Bag of 1000)
units
- - - - - - - - - - - - - -
RS Stock No. 829-3250
Mfr. Part No.LND150N3-G
BrandMicrochip
$0.811
Each (In a Pack of 20)
units
N 30 mA 500 V 1 kΩ 3V - -20 V, +20 V TO-92 Through Hole 3 Single Depletion 740 mW -
RS Stock No. 829-3320
Mfr. Part No.DN2530N3-G
BrandMicrochip
$0.859
Each (In a Pack of 10)
units
N 175 mA 300 V 12 Ω 3.5V - -20 V, +20 V TO-92 Through Hole 3 Single Depletion 740 mW -
RS Stock No. 170-4346
Mfr. Part No.DN2530N3-G
BrandMicrochip
$0.859
Each (In a Bag of 1000)
units
- - - - - - - - - - - - - -
RS Stock No. 170-4341
Mfr. Part No.DN2540N3-G
BrandMicrochip
$1.047
Each (In a Bag of 1000)
units
- - - - - - - - - - - - - -
RS Stock No. 178-4924
Mfr. Part No.DN2540N5-G
BrandMicrochip
$1.64
Each (In a Tube of 50)
units
N 500 mA 400 V 25 Ω 3.5V - -20 V, +20 V TO-220 Through Hole 3 Single Depletion 15 W -
RS Stock No. 829-3235
Mfr. Part No.DN2540N3-G
BrandMicrochip
$1.039
Each (In a Pack of 10)
units
N 120 mA 400 V 25 Ω 3.5V - -20 V, +20 V TO-92 Through Hole 3 Single Depletion 1 W -
RS Stock No. 829-3244
Mfr. Part No.DN2540N5-G
BrandMicrochip
$2.47
Each (In a Pack of 5)
units
N 500 mA 400 V 25 Ω 3.5V - -20 V, +20 V TO-220 Through Hole 3 Single Depletion 15 W -
RS Stock No. 165-4216
Mfr. Part No.TP2104N3-G
BrandMicrochip
$0.525
Each (In a Bag of 1000)
units
P 175 mA 40 V 10 Ω 2V - -20 V, +20 V TO-92 Through Hole 3 Single Enhancement 740 mW -
RS Stock No. 879-3270
Mfr. Part No.TP2104N3-G
BrandMicrochip
$0.784
Each (In a Pack of 25)
units
P 175 mA 40 V 10 Ω 2V - -20 V, +20 V TO-92 Through Hole 3 Single Enhancement 740 mW -
RS Stock No. 170-4348
Mfr. Part No.DN3545N3-G
BrandMicrochip
$0.966
Each (In a Bag of 1000)
units
- - - - - - - - - - - - - -
RS Stock No. 829-3358
Mfr. Part No.DN3545N3-G
BrandMicrochip
$1.201
Each (In a Pack of 10)
units
N 130 mA 450 V 20 Ω 3.5V - -20 V, +20 V TO-92 Through Hole 3 Single Depletion 740 mW -
RS Stock No. 165-6450
Mfr. Part No.DN3135K1-G
BrandMicrochip
$0.64
Each (In a Pack of 25)
units
N 72 mA 350 V 35 Ω - - -3.5 V SOT Surface Mount 3 Single Depletion 360 mW -
RS Stock No. 165-5144
Mfr. Part No.DN3135K1-G
BrandMicrochip
$0.598
Each (On a Reel of 3000)
units
N 72 mA 350 V 35 Ω - - -3.5 V SOT Surface Mount 3 Single Depletion 360 mW -
RS Stock No. 165-4217
Mfr. Part No.VN2222LL-G
BrandMicrochip
$0.358
Each (In a Bag of 1000)
units
N 230 mA 60 V 7.5 Ω 2.5V - -30 V, +30 V TO-92 Through Hole 3 Single Enhancement 1 W -
RS Stock No. 879-3274
Mfr. Part No.VN2222LL-G
BrandMicrochip
$0.567
Each (In a Pack of 25)
units
N 230 mA 60 V 7.5 Ω 2.5V - -30 V, +30 V TO-92 Through Hole 3 Single Enhancement 1 W -
RS Stock No. 916-3725
Mfr. Part No.DN2625DK6-G
BrandMicrochip
$3.48
Each (In a Pack of 5)
units
N 1.1 A 250 V 3.5 Ω - - -20 V, +20 V DFN Surface Mount 8 Single Depletion - -
RS Stock No. 829-3332
Mfr. Part No.DN2535N3-G
BrandMicrochip
$0.99
Each (In a Pack of 10)
units
N 120 mA 350 V 25 Ω 3.5V - -20 V, +20 V TO-92 Through Hole 3 Single Depletion 1 W -
RS Stock No. 165-4059
Mfr. Part No.MIC94053YC6-TR
BrandMicrochip
$0.716
Each (On a Reel of 3000)
units
P 2 A 6 V 180 mΩ 1.2V 0.5V -6 V SOT-363 (SC-70) Surface Mount 6 Single Enhancement 270 mW -
RS Stock No. 144-5876
Mfr. Part No.VN2410L-G
BrandMicrochip
$0.748
Each (In a Bag of 1000)
units
- - - - - - - TO-92 Through Hole 3 - - - -