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 Maximum Gate Threshold Voltage Mounting Type Minimum Gate Threshold Voltage Pin Count Maximum Gate Source Voltage Channel Mode Maximum Power Dissipation Transistor Configuration Number of Elements per Chip
RS Stock No. 739-0224
Mfr. Part No.2N7000TA
kr 2,473
Each (In a Pack of 10)
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N 200 mA 60 V 5 Ω TO-92 - Through Hole 0.3V 3 -30 V, +30 V Enhancement 400 mW Single 1
RS Stock No. 169-8553
Mfr. Part No.2N7000
kr 0,752
Each (On a Reel of 10000)
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N 200 mA 60 V 5 Ω TO-92 - Through Hole 0.8V 3 -20 V, +20 V Enhancement 400 mW Single 1
RS Stock No. 671-4733
Mfr. Part No.2N7000
kr 2,363
Each (In a Pack of 20)
Units
N 200 mA 60 V 5 Ω TO-92 - Through Hole 0.8V 3 -20 V, +20 V Enhancement 400 mW Single 1
RS Stock No. 124-1310
Mfr. Part No.2N7000TA
kr 0,645
Each (On a Reel of 2000)
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N 200 mA 60 V 5 Ω TO-92 - Through Hole 0.3V 3 -30 V, +30 V Enhancement 400 mW Single 1
RS Stock No. 903-4074
Mfr. Part No.2N7000-D26Z
kr 1,075
Each (In a Pack of 100)
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N 200 mA 60 V 9 Ω TO-92 - Through Hole 0.8V 3 -40 V, +40 V Enhancement 400 mW Single 1
RS Stock No. 124-1400
Mfr. Part No.FQP30N06L
kr 9,137
Each (In a Tube of 50)
Units
N 32 A 60 V 45 mΩ TO-220 - Through Hole 1V 3 -20 V, +20 V Enhancement 79 W Single 1
RS Stock No. 807-5863
Mfr. Part No.FQP30N06L
kr 10,748
Each (In a Pack of 5)
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N 32 A 60 V 45 mΩ TO-220 - Through Hole 1V 3 -20 V, +20 V Enhancement 79 W Single 1
RS Stock No. 166-2163
Mfr. Part No.FDBL86210-F085
kr 40,39
Each (On a Reel of 2000)
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N 169 A 150 V 17.5 mΩ PSOF 4V Surface Mount 2V 8 -20 V, +20 V Enhancement 500 W Single 1
RS Stock No. 864-8007
Mfr. Part No.FDBL86210-F085
kr 34,70
Each
Units
N 169 A 150 V 17.5 mΩ PSOF 4V Surface Mount 2V 8 -20 V, +20 V Enhancement 500 W Single 1
RS Stock No. 761-4583
Mfr. Part No.NDS9407
kr 6,56
Each (In a Pack of 5)
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P 3 A 60 V 250 mΩ SOIC - Surface Mount 1V 8 -20 V, +20 V Enhancement 2.5 W Single 1
RS Stock No. 166-2970
Mfr. Part No.NDS9407
kr 3,615
Each (On a Reel of 2500)
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P 3 A 60 V 250 mΩ SOIC - Surface Mount 1V 8 -20 V, +20 V Enhancement 2.5 W Single 1
RS Stock No. 671-5045
Mfr. Part No.FQP17P06
kr 9,572
Each (In a Pack of 5)
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P 17 A 60 V 120 mΩ TO-220AB - Through Hole 2V 3 -25 V, +25 V Enhancement 79 W Single 1
RS Stock No. 671-0312
Mfr. Part No.2N7002
kr 1,954
Each (In a Pack of 20)
Units
N 115 mA 60 V 7.5 Ω SOT-23 - Surface Mount 1V 3 -20 V, +20 V Enhancement 200 mW Single 1
RS Stock No. 671-0784
Mfr. Part No.FDT457N
kr 6,231
Each (In a Pack of 10)
Units
N 5 A 30 V 60 mΩ SOT-223 - Surface Mount 1V 3 + Tab -20 V, +20 V Enhancement 3 W Single 1
RS Stock No. 671-1090
Mfr. Part No.NDT3055L
kr 6,44
Each (In a Pack of 5)
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N 4 A 60 V 100 mΩ SOT-223 - Surface Mount 1V 3 + Tab -20 V, +20 V Enhancement 3 W Single 1
RS Stock No. 124-1755
Mfr. Part No.FQP17P06
kr 8,167
Each (In a Tube of 50)
Units
P 17 A 60 V 120 mΩ TO-220AB - Through Hole 2V 3 -25 V, +25 V Enhancement 79 W Single 1
RS Stock No. 166-3247
Mfr. Part No.FDS4559
kr 2,579
Each (On a Reel of 2500)
Units
N, P 3.5 A, 4.5 A 60 V 55 mΩ, 105 mΩ SOIC - Surface Mount - 8 -20 V, +20 V Enhancement 2 W Isolated 2
RS Stock No. 166-2705
Mfr. Part No.FDT457N
kr 2,794
Each (On a Reel of 4000)
Units
N 5 A 30 V 60 mΩ SOT-223 - Surface Mount 1V 3 + Tab -20 V, +20 V Enhancement 3 W Single 1
RS Stock No. 124-1724
Mfr. Part No.NDT3055L
kr 2,583
Each (On a Reel of 4000)
Units
N 4 A 60 V 100 mΩ SOT-223 - Surface Mount 1V 3 + Tab -20 V, +20 V Enhancement 3 W Single 1
RS Stock No. 917-5471
Mfr. Part No.FDS4559
kr 5,593
Each (In a Pack of 10)
Units
N, P 3.5 A, 4.5 A 60 V 55 mΩ, 105 mΩ SOIC - Surface Mount - 8 -20 V, +20 V Enhancement 2 W Isolated 2