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. 162-8537
Mfr. Part No.CSD17301Q5A
HK$8.648
Each (On a Reel of 2500)
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N 100 A 30 V 3.7 mΩ SON Surface Mount 8 -8 V, +10 V Enhancement 1.55V 0.9V 3.2 W Single 1
RS Stock No. 162-8538
Mfr. Part No.CSD17303Q5
HK$12.482
Each (On a Reel of 2500)
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N 100 A 30 V 3.7 mΩ SON Surface Mount 8 -8 V, +10 V Enhancement 1.6V 0.9V 3.2 W Single 1
RS Stock No. 133-0156
Mfr. Part No.CSD25404Q3T
HK$10.164
Each (In a Pack of 5)
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P 104 A 20 V 150 mΩ VSON-CLIP Surface Mount 8 -12 V, +12 V Enhancement 1.15V 0.65V 96 W Single 1
RS Stock No. 827-4830
Mfr. Part No.CSD17309Q3
HK$9.652
Each (In a Pack of 5)
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N 60 A 30 V 8.5 mΩ SON Surface Mount 8 -8 V, +10 V Enhancement 1.7V 0.9V 2.8 W Single 1
RS Stock No. 823-9256
Mfr. Part No.CSD18563Q5AT
HK$12.028
Each (In a Pack of 5)
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N 100 A 60 V 10.8 mΩ VSON Surface Mount 8 -20 V, +20 V Enhancement 2.4V 1.7V 3.2 W Single 1
RS Stock No. 145-0959
Mfr. Part No.CSD17483F4T
HK$0.891
Each (On a Reel of 250)
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N 1.5 A 30 V 550 mΩ PICOSTAR Surface Mount 3 -12 V, +12 V Enhancement 1.1V 0.65V 500 mW Single 1
RS Stock No. 827-4818
Mfr. Part No.CSD17301Q5A
HK$12.75
Each (In a Pack of 5)
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N 100 A 30 V 3.7 mΩ SON Surface Mount 8 -8 V, +10 V Enhancement 1.55V 0.9V 3.2 W Single 1
RS Stock No. 168-4377
Mfr. Part No.CSD18563Q5A
HK$8.679
Each (On a Reel of 2500)
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N 100 A 60 V 10.8 mΩ VSON-FET Surface Mount 8 -20 V, +20 V Enhancement 2.4V 1.7V 3.2 W Single 1
RS Stock No. 162-8560
Mfr. Part No.CSD25481F4
HK$0.78
Each (On a Reel of 3000)
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P 2.5 A 20 V 800 mΩ PICOSTAR Surface Mount 3 - Enhancement 1.2V 0.7V 500 mW Single 1
RS Stock No. 908-3849
Mfr. Part No.CSD17579Q3AT
HK$4.228
Each (In a Pack of 10)
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N 11 A 30 V 14.2 mΩ VSCONP Surface Mount 8 -20 V, +20 V Enhancement - - 3.2 W Single 1
RS Stock No. 168-4358
Mfr. Part No.CSD17381F4T
HK$1.12
Each (On a Reel of 250)
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N 3.1 A 30 V 250 mΩ PICOSTAR Surface Mount 3 -12 V, +12 V Enhancement 1.1V 0.65V 500 mW Single 1
RS Stock No. 162-9734
Mfr. Part No.CSD17573Q5BT
HK$9.749
Each (On a Reel of 250)
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N 43 A 30 V 1.45 mΩ VSCON-CLIP Surface Mount 8 -20 V, +20 V Enhancement - - 3.2 W Single 1
RS Stock No. 145-1334
Mfr. Part No.CSD19534KCS
HK$7.823
Each (In a Tube of 50)
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N 100 A 100 V 20 mΩ TO-220 Through Hole 3 -20 V, +20 V Enhancement - - 118 W Single 1
RS Stock No. 168-4939
Mfr. Part No.CSD18536KTTT
HK$36.27
Each (In a Tube of 50)
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N 349 A 60 V 2.2 mΩ D2PAK (TO-263) Surface Mount 3 -20 V, +20 V Enhancement 2.2V 1.4V 375 W Single 1
RS Stock No. 145-6334
Mfr. Part No.CSD83325LT
HK$2.965
Each (On a Reel of 250)
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N 8 A 12 V 23 mΩ PICOSTAR Surface Mount 6 -10 V, +10 V Enhancement - - 2.3 W Single 1
RS Stock No. 162-8533
Mfr. Part No.CSD16412Q5A
HK$4.137
Each (On a Reel of 2500)
units
N 52 A 25 V 16 mΩ SON Surface Mount 8 -12 V, +16 V Enhancement 2.3V 1.7V 3 W Single 1
RS Stock No. 168-4941
Mfr. Part No.CSD19537Q3T
HK$7.208
Each (On a Reel of 250)
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N 53 A 100 V 16.6 mΩ VSON-CLIP Surface Mount 8 -20 V, +20 V Enhancement 3.6V 2.6V 83 W Single 1
RS Stock No. 827-4697
Mfr. Part No.CSD16322Q5
HK$9.756
Each (In a Pack of 5)
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N 97 A 25 V 7.2 mΩ SON Surface Mount 8 -8 V, +10 V Enhancement 1.4V 0.9V 3.1 W Single 1
RS Stock No. 827-4892
Mfr. Part No.CSD18533Q5A
HK$12.35
Each (In a Pack of 5)
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N 100 A 60 V 8.5 mΩ SON Surface Mount 8 -20 V, +20 V Enhancement 2.3V 1.5V 3.2 W Single 1
RS Stock No. 914-2945
Mfr. Part No.CSD25304W1015T
HK$4.142
Each (In a Pack of 10)
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P 3 A 20 V 92 mΩ DSBGA Surface Mount 6 -8 V, +8 V Enhancement 1.15V 0.55V 750 mW Single 1