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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RS庫存編號 827-4919
製造零件編號CSD19536KCS
HK$46.18
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N 259 A 100 V 3.2 mΩ TO-220 Through Hole 3 -20 V, +20 V Enhancement 3.2V 2.1V 375 W Single 1
RS庫存編號 121-9764
製造零件編號CSD19536KCS
HK$36.656
毎管:50 個
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N 259 A 100 V 3.2 mΩ TO-220 Through Hole 3 -20 V, +20 V Enhancement 3.2V 2.1V 375 W Single 1
RS庫存編號 208-8489
製造零件編號CSD25310Q2
HK$4.588
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P 20 A 20 V 2.39e+006 Ω WSON - 6 - Enhancement 0.55V - - - 1
RS庫存編號 827-4883
製造零件編號CSD18504Q5A
HK$10.048
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N 75 A 40 V 9.8 mΩ SON Surface Mount 8 -20 V, +20 V Enhancement 2.4V 1.5V 3.1 W Single 1
RS庫存編號 827-4909
製造零件編號CSD18563Q5A
HK$14.826
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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庫存編號 162-8526
製造零件編號CSD16321Q5
HK$6.783
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N 100 A 25 V 3.8 mΩ SON Surface Mount 8 -8 V, +10 V Enhancement 1.4V 0.9V 3.1 W Single 1
RS庫存編號 827-4928
製造零件編號CSD23381F4
HK$2.573
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P 2.3 A 12 V 970 mΩ PICOSTAR Surface Mount 3 +8 V Enhancement 1.2V 0.7V 500 mW Single 1
RS庫存編號 823-9240
製造零件編號CSD17381F4T
HK$2.688
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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庫存編號 162-8527
製造零件編號CSD16322Q5
HK$4.557
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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庫存編號 827-4903
製造零件編號CSD19506KCS
HK$46.38
單位
N 273 A 80 V 2.8 mΩ TO-220 Through Hole 3 -20 V, +20 V Enhancement 3.2V 2.1V 375 W Single 1
RS庫存編號 827-4886
製造零件編號CSD18531Q5A
HK$15.718
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N 134 A 60 V 5.8 mΩ SON Surface Mount 8 -20 V, +20 V Enhancement 2.3V 1.5V 3.1 W Single 1
RS庫存編號 900-9942
製造零件編號CSD83325LT
HK$4.767
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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庫存編號 162-8553
製造零件編號CSD18531Q5A
HK$8.331
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單位
N 134 A 60 V 5.8 mΩ SON Surface Mount 8 -20 V, +20 V Enhancement 2.3V 1.5V 3.1 W Single 1
RS庫存編號 162-8540
製造零件編號CSD17307Q5A
HK$2.688
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N 73 A 30 V 17.3 mΩ SON Surface Mount 8 -8 V, +10 V Enhancement 1.8V 0.9V 3 W Single 1
RS庫存編號 145-6843
製造零件編號CSD25483F4T
HK$1.512
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P 1.6 A 20 V 1.07 Ω PICOSTAR Surface Mount 3 - Enhancement 1.2V 0.7V 500 mW Single 1
RS庫存編號 168-4939
製造零件編號CSD18536KTTT
HK$40.366
毎管:50 個
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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庫存編號 827-4870
製造零件編號CSD18502Q5B
HK$22.554
/個 (每包:5個)
單位
N 204 A 40 V 3.3 mΩ VSON Surface Mount 8 -20 V, +20 V Enhancement 2.2V 1.5V 3.2 W Single 1
RS庫存編號 208-8476
製造零件編號CSD17484F4
HK$0.881
個 (在毎卷:3000)
單位
N 3 A 30 V 128000000 Ω VSONP - 8 - Enhancement 0.65V - - - 1
RS庫存編號 145-1158
製造零件編號CSD17484F4T
HK$1.432
個 (在毎卷:250)
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N 3 A 30 V 270 mΩ PICOSTAR Surface Mount 3 -12 V, +12 V Enhancement - - 500 mW Single 1
RS庫存編號 162-9740
製造零件編號CSD25304W1015T
HK$2.66
個 (在毎卷:250)
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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