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. 398-423
Mfr. Part No.TSM2302CX RFG
£0.254
Each (In a Pack of 50)
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N 2.8 A 20 V 65 mΩ SOT-23 Surface Mount 3 -8 V, +8 V Enhancement 1.2V - 900 mW Single 1
RS Stock No. 169-8935
Mfr. Part No.TSM2302CX RFG
£0.199
Each (On a Reel of 3000)
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N 2.8 A 20 V 65 mΩ SOT-23 Surface Mount 3 -8 V, +8 V Enhancement 1.2V - 900 mW Single 1
RS Stock No. 169-9282
Mfr. Part No.TSM2307CX RFG
£0.276
Each (On a Reel of 3000)
Units
P 3 A 30 V 140 mΩ SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 3V - 1.25 W Single 1
RS Stock No. 743-6030
Mfr. Part No.TSM2307CX RFG
£0.305
Each (In a Pack of 25)
Units
P 3 A 30 V 140 mΩ SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 3V - 1.25 W Single 1
RS Stock No. 169-9285
Mfr. Part No.TSM2310CX RFG
£0.089
Each (On a Reel of 3000)
Units
N 4 A 20 V 100 mΩ SOT-23 Surface Mount 3 -12 V, +12 V Enhancement 1.2V - 1.25 W Single 1
RS Stock No. 169-9279
Mfr. Part No.TSM2306CX RFG
£0.326
Each (On a Reel of 3000)
Units
N 3.5 A 30 V 94 mΩ SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 3V - 1.25 W Single 1
RS Stock No. 743-6021
Mfr. Part No.TSM2306CX RFG
£0.334
Each (In a Pack of 25)
Units
N 3.5 A 30 V 94 mΩ SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 3V - 1.25 W Single 1
RS Stock No. 743-6059
Mfr. Part No.TSM2312CX RFG
£0.327
Each (In a Pack of 10)
Units
N 4.9 A 20 V 51 mΩ SOT-23 Surface Mount 3 -8 V, +8 V Enhancement 1V - 750 mW Single 1
RS Stock No. 169-9287
Mfr. Part No.TSM2312CX RFG
£0.321
Each (On a Reel of 3000)
Units
N 4.9 A 20 V 51 mΩ SOT-23 Surface Mount 3 -8 V, +8 V Enhancement 1V - 750 mW Single 1
RS Stock No. 743-6049
Mfr. Part No.TSM3457CX6 RFG
£0.383
Each (In a Pack of 10)
Units
P 5 A 30 V 100 mΩ SOT-26 Surface Mount 6 -20 V, +20 V Enhancement 3V - 2 W Single 1
RS Stock No. 169-9284
Mfr. Part No.TSM3457CX6 RFG
£0.147
Each (On a Reel of 3000)
Units
P 5 A 30 V 100 mΩ SOT-26 Surface Mount 6 -20 V, +20 V Enhancement 3V - 2 W Single 1
RS Stock No. 146-2235
Mfr. Part No.TSM6968DCA RVG
£0.399
Each (On a Reel of 3000)
Units
N 6.5 A 20 V 22 mΩ TSSOP Surface Mount 8 -12 V, +12 V Enhancement 1V - 1.04 W Common Drain 2
RS Stock No. 398-449
Mfr. Part No.TSM6968DCA RVG
£0.419
Each (In a Pack of 50)
Units
N 6.5 A 20 V 22 mΩ TSSOP Surface Mount 8 -12 V, +12 V Enhancement 1V - 1.04 W Common Drain 2
New
RS Stock No. 216-9659
Mfr. Part No.TSM045NB06CR
£0.834
Each (In a Pack of 10)
Units
- 104 A 60 V 5 mΩ PDFN56 - 8 - Enhancement 4V - - - -
New
RS Stock No. 216-9693
Mfr. Part No.TSM150NB04DCR
£0.306
Each (On a Reel of 2500)
Units
- 38 A 40 V 15 mΩ PDFN56 - 8 - Enhancement 4V - - - -
RS Stock No. 171-3693
Mfr. Part No.TSM2303CX RFG
£0.059
Each (In a Pack of 100)
Units
P 1.3 A 30 V 300 mΩ SOT-23 Surface Mount 3 ±20 V Enhancement 3V 1V 700 mW Single 1
RS Stock No. 171-3640
Mfr. Part No.TSM7N90CI C0G
£1.432
Each (On a Reel of 1000)
Units
N 7 A 900 V 1.9 Ω ITO-220 Through Hole 3 ±30 V Enhancement 4V 2V 40.3 W Single 1
New
RS Stock No. 216-9701
Mfr. Part No.TSM220NB06CR
£0.272
Each (On a Reel of 2500)
Units
- 35 A 60 V 22 mΩ PDFN56 - 8 - Enhancement 4V - - - -
New
RS Stock No. 216-9660
Mfr. Part No.TSM048NB06LCR
£0.681
Each (On a Reel of 2500)
Units
- 107 A 60 V 4.8 mΩ PDFN56 - 8 - Enhancement 2.5V - - - -
New
RS Stock No. 216-9665
Mfr. Part No.TSM055N03PQ56
£0.205
Each (On a Reel of 2500)
Units
- 80 A 30 V 8.5 mΩ PDFN56 - 8 - Enhancement 2.5V - - - -