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. 124-6854
Mfr. Part No.SCT2280KEC
BrandROHM
TWD344.00
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N 14 A 1200 V 388 mΩ TO-247 Through Hole 3 -6 V, +22 V Enhancement 4V 1.6V 108 W - 1
RS Stock No. 124-6853
Mfr. Part No.SCT2160KEC
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TWD485.00
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N 22 A 1200 V 226 mΩ TO-247 Through Hole 3 -6 V, +22 V Enhancement 4V 1.6V 165 W - 1
RS Stock No. 826-7841
Mfr. Part No.ZDX130N50
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TWD53.00
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N 13 A 500 V 520 mΩ TO-220FM Through Hole 3 -30 V, +30 V Enhancement 4.5V - 40 W Single 1
RS Stock No. 826-7765
Mfr. Part No.RSF014N03TL
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TWD15.40
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N 1.4 A 30 V 380 mΩ TUMT Surface Mount 3 -20 V, +20 V Enhancement 2.5V - 800 mW Single 1
RS Stock No. 124-6852
Mfr. Part No.SCT2120AFC
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TWD446.00
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N 29 A 650 V 156 mΩ TO-220AB Through Hole 3 -6 V, +22 V Enhancement 4V 1.6V 165 W - 1
RS Stock No. 124-6839
Mfr. Part No.RUM002N02T2L
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N 200 mA 20 V 4.8 Ω SOT-723 Surface Mount 3 -8 V, +8 V Enhancement 1V 0.3V 150 mW - 1
RS Stock No. 185-1239
Mfr. Part No.R6050JNZ4C13
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TWD304.00
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- - - - - - - - - - - - - -
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Mfr. Part No.R6020KNZ1C9
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N 20 A 600 V 360 mΩ TO-247 Through Hole 3 ±20 (Static) V, ±30 V Enhancement 5V 3V 231 W Single 1
RS Stock No. 172-0500
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N 5 A 60 V 140 mΩ TO-252 Surface Mount 2 + Tab ±20 V Enhancement 3V 1V 15 W Single 1
RS Stock No. 133-2842
Mfr. Part No.RSJ151P10TL
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P 15 A 100 V 220 mΩ D2PAK (TO-263) Surface Mount 3 -20 V, +20 V Enhancement 2.5V 1V 50 W Single 1
RS Stock No. 133-2849
Mfr. Part No.RV1C001ZPT2L
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P 100 mA 20 V 40 Ω DFN Surface Mount 3 -10 V, +10 V Enhancement 1V 0.3V 100 mW Single 1
RS Stock No. 177-6118
Mfr. Part No.R6520KNX
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TWD63.70
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N 20 A 650 V 200 mΩ TO-220FM Through Hole 3 ±30 V Enhancement 5V 3V 68 W Single 1
RS Stock No. 177-6047
Mfr. Part No.R6007END3TL1
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TWD27.10
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N 7 A 600 V 620 mΩ TO-252 Surface Mount 3 ±30 V Enhancement 4V 2V 78 W Single 1
RS Stock No. 183-5482
Mfr. Part No.RS1E240BNTB
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N 40 A 30 V 4.6 mΩ HSOP Surface Mount 8 ±20 V Enhancement 2.5V 1V 30 W Single 1
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Mfr. Part No.R6020ENJTL
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TWD89.80
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N 20 A 600 V 360 mΩ LPTS, TO-263 Surface Mount 2 + Tab ±30 V Enhancement 4V 2V 231 W Single 1
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Mfr. Part No.RQ5L015SPTL
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TWD11.60
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P 1.5 A 60 V 360 mΩ SOT-346T (SC-96) Surface Mount 3 -20 V, +20 V Enhancement 3V 1V 1 W Single 1
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Mfr. Part No.R6520KNX1C10
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N 20 A 650 V 200 mΩ TO-220AB Through Hole 3 ±30 V Enhancement 5V 3V 220 W Single 1
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N 200 mA 50 V 9 Ω SOT-563 Surface Mount 6 -8 V, +8 V Enhancement 0.8V 0.3V 150 mW Isolated 2
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P 2.5 A 12 V 180 mΩ SOT-363T Surface Mount 6 -8 V Enhancement 0.3V 1V 1 W - 2