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, TO-220 and SOIC.

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
New
RS Stock No. 178-0786
Mfr. Part No.IRFP9240PBF
BrandVishay
$3.63
Each (In a Tube of 25)
units
- - - - - - - - - - - - - -
RS Stock No. 541-0862
Mfr. Part No.IRFP9240PBF
BrandVishay
$4.15
Each
units
P 12 A 200 V 500 mΩ - 2V -20 V, +20 V TO-247AC Through Hole 3 Single Enhancement Power MOSFET 150 W
RS Stock No. 761-6918
Mfr. Part No.2SK2225-E
$8.30
Each
units
N 2 A 1500 V 12 Ω 4V - -20 V, +20 V TO-3PFM Through Hole 3 Single Enhancement Power MOSFET 50 W
RS Stock No. 541-1736
Mfr. Part No.IRF5305PBF
BrandInfineon
$1.52
Each
units
P 31 A 55 V 60 mΩ 4V 2V -20 V, +20 V TO-220AB Through Hole 3 Single Enhancement Power MOSFET 110 W
RS Stock No. 919-4924
Mfr. Part No.IRF5305PBF
BrandInfineon
$1.323
Each (In a Tube of 50)
units
P 31 A 55 V 60 mΩ 4V 2V -20 V, +20 V TO-220AB Through Hole 3 Single Enhancement Power MOSFET 110 W
RS Stock No. 807-5863
Mfr. Part No.FQP30N06L
$1.908
Each (In a Pack of 5)
units
N 32 A 60 V 45 mΩ - 1V -20 V, +20 V TO-220 Through Hole 3 Single Enhancement Power MOSFET 79 W
RS Stock No. 124-1400
Mfr. Part No.FQP30N06L
$1.137
Each (In a Tube of 50)
units
N 32 A 60 V 45 mΩ - 1V -20 V, +20 V TO-220 Through Hole 3 Single Enhancement Power MOSFET 79 W
RS Stock No. 545-2620
Mfr. Part No.2N7000G
$108.87
Each (On a Reel of 1000)
units
N 200 mA 60 V 5 Ω 3V - -20 V, +20 V TO-92 Through Hole 3 Single Enhancement Small Signal 350 mW
RS Stock No. 124-9024
Mfr. Part No.IRLB3034PBF
BrandInfineon
$3.147
Each (In a Tube of 50)
units
N 343 A 40 V 2 mΩ 2.5V 1V -20 V, +20 V TO-220AB Through Hole 3 Single Enhancement Power MOSFET 375 W
RS Stock No. 688-7204
Mfr. Part No.IRLB3034PBF
BrandInfineon
$4.485
Each (In a Pack of 2)
units
N 343 A 40 V 2 mΩ 2.5V 1V -20 V, +20 V TO-220AB Through Hole 3 Single Enhancement Power MOSFET 375 W
RS Stock No. 663-9465
Mfr. Part No.CPH6316-TL-E
BrandSanyo
$0.404
Each (In a Pack of 5)
units
P 3 A 30 V 295 mΩ - - -20 V, +20 V CPH Surface Mount 6 - Enhancement Switching 1.6 W
New
RS Stock No. 178-4752
Mfr. Part No.FQP27P06
$2.499
Each (In a Tube of 50)
units
- - - - - - - - - - - - - -
RS Stock No. 124-1745
Mfr. Part No.BS170
$0.121
Each (In a Bag of 1000)
units
N 500 mA 60 V 5 Ω 3V 0.8V -20 V, +20 V TO-92 Through Hole 3 Single Enhancement Power MOSFET 830 mW
RS Stock No. 671-4736
Mfr. Part No.BS170
$0.544
Each (In a Pack of 10)
units
N 500 mA 60 V 5 Ω 3V 0.8V -20 V, +20 V TO-92 Through Hole 3 Single Enhancement Power MOSFET 830 mW
RS Stock No. 671-5064
Mfr. Part No.FQP27P06
$2.912
Each (In a Pack of 5)
units
P 27 A 60 V 70 mΩ 4V 2V -25 V, +25 V TO-220AB Through Hole 3 Single Enhancement Power MOSFET 120 W
RS Stock No. 169-8553
Mfr. Part No.2N7000
$0.093
Each (On a Reel of 10000)
units
N 200 mA 60 V 5 Ω - 0.8V -20 V, +20 V TO-92 Through Hole 3 Single Enhancement Small Signal 400 mW
RS Stock No. 671-4733
Mfr. Part No.2N7000
$0.447
Each (In a Pack of 20)
units
N 200 mA 60 V 5 Ω - 0.8V -20 V, +20 V TO-92 Through Hole 3 Single Enhancement Small Signal 400 mW
RS Stock No. 124-1310
Mfr. Part No.2N7000TA
$0.086
Each (On a Reel of 2000)
units
N 200 mA 60 V 5 Ω - 0.3V -30 V, +30 V TO-92 Through Hole 3 Single Enhancement Small Signal 400 mW
RS Stock No. 903-4074
Mfr. Part No.2N7000-D26Z
$0.223
Each (In a Pack of 100)
units
N 200 mA 60 V 9 Ω - 0.8V -40 V, +40 V TO-92 Through Hole 3 Single Enhancement Power MOSFET 400 mW
RS Stock No. 739-0224
Mfr. Part No.2N7000TA
$0.361
Each (In a Pack of 10)
units
N 200 mA 60 V 5 Ω - 0.3V -30 V, +30 V TO-92 Through Hole 3 Single Enhancement Small Signal 400 mW