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. For more information about MOSFETs, please see our complete guide to MOSFETs.

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 like 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 like standard MOSFETs but they are designed to handle a higher level of power.

N-Channel vs. P-Channel MOSFETs

N-Channel MOSFETs contain additional electrons which are free to move around. They are a 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.


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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. 419-2197
Mfr. Part No.STP12NM50
SGD5.68
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N 12 A 500 V 350 mΩ TO-220 Through Hole 3 -30 V, +30 V Enhancement 5V 3V 160 W Single 1
RS Stock No. 920-6682
Mfr. Part No.STP12NM50
SGD4.832
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N 12 A 500 V 350 mΩ TO-220 Through Hole 3 -30 V, +30 V Enhancement 5V 3V 160 W Single 1
RS Stock No. 760-9862
Mfr. Part No.STB70NF3LLT4
SGD1.712
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N 70 A 30 V 12 mΩ D2PAK (TO-263) Surface Mount 3 -16 V, +16 V Enhancement - 1V 100 W Single 1
RS Stock No. 168-7480
Mfr. Part No.STB70NF3LLT4
SGD0.755
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N 70 A 30 V 12 mΩ D2PAK (TO-263) Surface Mount 3 -16 V, +16 V Enhancement - 1V 100 W Single 1
RS Stock No. 920-8840
Mfr. Part No.STP75NF75
SGD2.432
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N 80 A 75 V 11 mΩ TO-220 Through Hole 3 -20 V, +20 V Enhancement 4V 2V 300 W Single 1
RS Stock No. 485-7844
Mfr. Part No.STP75NF75
SGD3.94
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N 80 A 75 V 11 mΩ TO-220 Through Hole 3 -20 V, +20 V Enhancement 4V 2V 300 W Single 1
RS Stock No. 761-0014
Mfr. Part No.STP14NK50Z
SGD5.356
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N 14 A 500 V 380 mΩ TO-220 Through Hole 3 -30 V, +30 V Enhancement 4.5V 3V 150 W Single 1
RS Stock No. 761-2751
Mfr. Part No.STF13NM60N
SGD5.19
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N 11 A 600 V 360 mΩ TO-220FP Through Hole 3 -25 V, +25 V Enhancement 4V 2V 25 W Single 1
RS Stock No. 687-5197
Mfr. Part No.STB55NF06T4
SGD2.752
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N 50 A 60 V 18 mΩ D2PAK (TO-263) Surface Mount 3 -20 V, +20 V Enhancement 4V 2V 110 W Single 1
RS Stock No. 920-6608
Mfr. Part No.STB55NF06T4
SGD1.326
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N 50 A 60 V 18 mΩ D2PAK (TO-263) Surface Mount 3 -20 V, +20 V Enhancement 4V 2V 110 W Single 1
RS Stock No. 103-1999
Mfr. Part No.STF13NM60N
SGD4.40
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N 11 A 600 V 360 mΩ TO-220FP Through Hole 3 -25 V, +25 V Enhancement 4V 2V 25 W Single 1
RS Stock No. 920-6695
Mfr. Part No.STP14NK50Z
SGD4.559
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N 14 A 500 V 380 mΩ TO-220 Through Hole 3 -30 V, +30 V Enhancement 4.5V 3V 150 W Single 1
RS Stock No. 486-2228
Mfr. Part No.STP20NM60FD
SGD8.86
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N 20 A 600 V 290 mΩ TO-220 Through Hole 3 -30 V, +30 V Enhancement 5V 3V 192 W Single 1
RS Stock No. 486-6264
Mfr. Part No.STW8NK80Z
SGD4.49
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N 6.2 A 800 V 1.5 Ω TO-247 Through Hole 3 -30 V, +30 V Enhancement 4.5V 3V 140 W Single 1
RS Stock No. 168-6292
Mfr. Part No.STW8NK80Z
SGD3.42
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N 6.2 A 800 V 1.5 Ω TO-247 Through Hole 3 -30 V, +30 V Enhancement 4.5V 3V 140 W Single 1
RS Stock No. 920-8736
Mfr. Part No.STP20NM60FD
SGD7.518
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N 20 A 600 V 290 mΩ TO-220 Through Hole 3 -30 V, +30 V Enhancement 5V 3V 192 W Single 1
RS Stock No. 761-0452
Mfr. Part No.STF19NF20
SGD1.596
Each (In a Pack of 5)
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N 15 A 200 V 160 mΩ TO-220FP Through Hole 3 -20 V, +20 V Enhancement 4V 2V 25 W Single 1
RS Stock No. 920-8773
Mfr. Part No.STP36NF06L
SGD1.10
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N 30 A 60 V 40 mΩ TO-220 Through Hole 3 -18 V, +18 V Enhancement 2.5V 1V 70 W Single 1
RS Stock No. 486-5671
Mfr. Part No.STP36NF06L
SGD1.372
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N 30 A 60 V 40 mΩ TO-220 Through Hole 3 -18 V, +18 V Enhancement 2.5V 1V 70 W Single 1
RS Stock No. 920-8761
Mfr. Part No.STP20NF06L
SGD1.492
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N 20 A 60 V 85 mΩ TO-220 Through Hole 3 -18 V, +18 V Enhancement - - 60 W Single 1