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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RS庫存編號 823-5554
製造零件編號IPP80P03P4L04AKSA1
BrandInfineon
HK$18.866
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P 80 A 30 V 7 mΩ TO-220 Through Hole 3 -16 V, +5 V Enhancement 2V 1V 137 W Single 1
RS庫存編號 841-312
製造零件編號RFP70N06
HK$14.85
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N 70 A 60 V 14 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement - 2V 150 W Single 1
RS庫存編號 485-7888
製造零件編號STP80NF10
HK$25.09
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N 80 A 100 V 15 mΩ TO-220 Through Hole 3 -20 V, +20 V Enhancement 4V 2V 300 W Single 1
RS庫存編號 906-4410
製造零件編號BSC360N15NS3GATMA1
BrandInfineon
HK$11.44
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N 33 A 150 V 38 mΩ TDSON Surface Mount 8 -20 V, +20 V Enhancement - - 74 W Single 1
RS庫存編號 541-0008
製造零件編號IRFP064NPBF
BrandInfineon
HK$21.74
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N 110 A 55 V 8 mΩ TO-247AC Through Hole 3 -20 V, +20 V Enhancement 4V 2V 200 W Single 1
RS庫存編號 169-8020
製造零件編號MTM231232LBF
BrandPanasonic
HK$1.431
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P 3 A 20 V 40 mΩ Smini3-G1-B Surface Mount 3 -10 V, +10 V Enhancement 1.3V - 500 mW Single 1
RS庫存編號 920-6658
製造零件編號STP80NF10
HK$20.884
毎管:50 個
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N 80 A 100 V 15 mΩ TO-220 Through Hole 3 -20 V, +20 V Enhancement 4V 2V 300 W Single 1
RS庫存編號 541-1180
製造零件編號IRF520NPBF
BrandInfineon
HK$8.01
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N 9.7 A 100 V 200 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 4V 2V 48 W Single 1
RS庫存編號 121-6308
製造零件編號NTR4003NT3G
HK$0.302
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N 560 mA 30 V 2 Ω SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 1.4V - 830 mW Single 1
RS庫存編號 124-9058
製造零件編號IPP80P03P4L04AKSA1
BrandInfineon
HK$16.35
毎管:50 個
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P 80 A 30 V 7 mΩ TO-220 Through Hole 3 -16 V, +5 V Enhancement 2V 1V 137 W Single 1
RS庫存編號 486-2313
製造零件編號STP4NK60ZFP
HK$13.338
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N 4 A 600 V 2 Ω TO-220FP Through Hole 3 -30 V, +30 V Enhancement 4.5V 3V 25 W Single 1
RS庫存編號 170-3526
製造零件編號NTR4003NT1G
HK$0.327
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N 560 mA 30 V 2 Ω SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 1.4V - 690 mW Single 1
RS庫存編號 807-5879
製造零件編號FQP8P10
HK$7.046
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P 5.7 A 100 V 530 mΩ TO-220 Through Hole 3 -30 V, +30 V Enhancement - 2V 65 W Single 1
RS庫存編號 168-6215
製造零件編號STP4NK60ZFP
HK$11.407
毎管:50 個
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N 4 A 600 V 2 Ω TO-220FP Through Hole 3 -30 V, +30 V Enhancement 4.5V 3V 25 W Single 1
RS庫存編號 829-3244
製造零件編號DN2540N5-G
BrandMicrochip
HK$10.998
/個 (每包:5個)
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N 500 mA 400 V 25 Ω TO-220 Through Hole 3 -20 V, +20 V Depletion 3.5V - 15 W Single 1
RS庫存編號 919-4876
製造零件編號IRF520NPBF
BrandInfineon
HK$6.987
毎管:50 個
單位
N 9.7 A 100 V 200 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 4V 2V 48 W Single 1
RS庫存編號 166-2169
製造零件編號FQP8P10
HK$7.046
毎管:50 個
單位
P 5.7 A 100 V 530 mΩ TO-220 Through Hole 3 -30 V, +30 V Enhancement - 2V 65 W Single 1
RS庫存編號 787-7529
製造零件編號MTM231232LBF
BrandPanasonic
HK$3.842
/個 (每包:50個)
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P 3 A 20 V 40 mΩ Smini3-G1-B Surface Mount 3 -10 V, +10 V Enhancement 1.3V - 500 mW Single 1
RS庫存編號 783-3030
製造零件編號STD18N65M5
HK$27.676
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N 15 A 710 V 220 mΩ DPAK (TO-252) Surface Mount 3 -25 V, +25 V Enhancement 5V 3V 110 W Single 1
RS庫存編號 790-5283
製造零件編號NTR4003NT1G
HK$0.583
/個 (每包:100個)
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N 560 mA 30 V 2 Ω SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 1.4V - 690 mW Single 1