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 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.



Looking for MOSFET Drivers?


...
Read more Read less

Filters

Viewing 1 - 19 of 19 products
Results per page
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. 807-6692
Mfr. Part No.HUF75639G3
£1.895
Each (In a Pack of 2)
Units
N 56 A 100 V 25 mΩ TO-247 Through Hole 3 -20 V, +20 V Enhancement - 2V 200 W Single 1
RS Stock No. 739-6260
Mfr. Part No.FDMC4435BZ
£0.534
Each (In a Pack of 5)
Units
P 32 A 30 V 37 mΩ MLP Surface Mount 8 -25 V, +25 V Enhancement - 1V 31 W Single 1
RS Stock No. 671-0501
Mfr. Part No.FDS3692
£0.698
Each (In a Pack of 5)
Units
N 4.5 A 100 V 60 mΩ SOIC Surface Mount 8 -20 V, +20 V Enhancement - 2V 2.5 W Single 1
RS Stock No. 807-5920
Mfr. Part No.FQT1N80TF_WS
£0.464
Each (In a Pack of 10)
Units
N 200 mA 800 V 20 Ω SOT-223 Surface Mount 3 + Tab -30 V, +30 V Enhancement - 3V 2.1 W Single 1
RS Stock No. 864-8017
Mfr. Part No.FDC642P_F085
£0.413
Each (In a Pack of 25)
Units
P 4 A 20 V 105 mΩ SOT-23 Surface Mount 6 -8 V, +8 V Enhancement - 0.4V 1.2 W Single 1
RS Stock No. 864-8063
Mfr. Part No.FDD2572_F085
£0.364
Each (In a Pack of 10)
Units
N 29 A 150 V 146 mΩ DPAK (TO-252) Surface Mount 3 -20 V, +20 V Enhancement - 2V 135 W Single 1
RS Stock No. 864-8013
Mfr. Part No.FDC5661N_F085
£0.352
Each (In a Pack of 25)
Units
N 4 A 60 V 86 mΩ SOT-23 Surface Mount 6 -20 V, +20 V Enhancement 3V 1V 1.6 W Single 1
RS Stock No. 864-8111
Mfr. Part No.FDD8444_F085
£0.432
Each (In a Pack of 5)
Units
N 145 A 40 V 9.4 mΩ DPAK (TO-252) Surface Mount 3 -20 V, +20 V Enhancement - 2V 153 W Single 1
RS Stock No. 671-4755
Mfr. Part No.FCP7N60
£1.248
Each (In a Pack of 5)
Units
N 7 A 600 V 600 mΩ TO-220AB Through Hole 3 -30 V, +30 V Enhancement - 3V 83 W Single 1
RS Stock No. 671-4774
Mfr. Part No.FDP038AN06A0
£1.02
Each
Units
N 17 A 60 V 4 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement - 2V 310 W Single 1
RS Stock No. 124-1747
Mfr. Part No.FDP038AN06A0
£2.20
Each (In a Tube of 50)
Units
N 17 A 60 V 4 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement - 2V 310 W Single 1
RS Stock No. 759-9049
Mfr. Part No.FDD10AN06A0
£1.318
Each (In a Pack of 5)
Units
N 50 A 60 V 23 mΩ DPAK (TO-252) Surface Mount 3 -20 V, +20 V Enhancement - 2V 135 W Single 1
RS Stock No. 806-3517
Mfr. Part No.FDMS86105
£0.37
Each (In a Pack of 5)
Units
N 6 A 100 V 57 mΩ Power 56 Surface Mount 8 -20 V, +20 V Enhancement - 2V 48 W Single 1
RS Stock No. 671-0576
Mfr. Part No.FDS6574A
£1.18
Each (In a Pack of 5)
Units
N 16 A 20 V 6 mΩ SOIC Surface Mount 8 -8 V, +8 V Enhancement - 0.4V 2.5 W Single 1
RS Stock No. 759-9059
Mfr. Part No.FDD2572
£1.25
Each (In a Pack of 2)
Units
N 29 A 150 V 146 mΩ DPAK (TO-252) Surface Mount 3 -20 V, +20 V Enhancement - 2V 135 W Single 1
RS Stock No. 169-8538
Mfr. Part No.NDS0610
£0.043
Each (On a Reel of 3000)
Units
P 120 mA 60 V 10 Ω SOT-23 Surface Mount 3 -20 V, +20 V Enhancement - 1V 360 mW Single 1
RS Stock No. 169-8806
Mfr. Part No.NDT3055
£0.197
Each (On a Reel of 4000)
Units
N 4 A 60 V 180 mΩ SOT-223 Surface Mount 3 + Tab -20 V, +20 V Enhancement - - 3 W Single 1
RS Stock No. 864-8082
Mfr. Part No.FDD4243_F085
£0.542
Each (In a Pack of 10)
Units
P 14 A 40 V 70 mΩ DPAK (TO-252) Surface Mount 3 -20 V, +20 V Enhancement - 1.4V 50 W Single 1
RS Stock No. 671-0936
Mfr. Part No.FQD10N20CTM
£0.518
Each (In a Pack of 5)
Units
N 7.8 A 200 V 360 mΩ DPAK Surface Mount 3 -30 V, +30 V Enhancement - 2V 50 W - 1