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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製造零件編號TK17A65W,S5X(M
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N 17 A 650 V 200 mΩ TO-220SIS Through Hole 3 -30 V, +30 V Enhancement 3.5V - 45 W Single 1
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N 2.9 A 60 V 170 mΩ SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 3V 1V 1.3 W Single 1
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製造零件編號C2M1000170D
BrandWolfspeed
HK$43.46
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N 5 A 1700 V 1.4 Ω TO-247 Through Hole 3 -5 V, +20 V Enhancement 3.1V 2.4V 69 W Single 1
RS庫存編號 169-7208
製造零件編號PSMN5R6-100PS,127
BrandNexperia
HK$8.539
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N 100 A 100 V 5.6 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 4V 2V 306 W Single 1
RS庫存編號 919-4902
製造零件編號IRFP140NPBF
BrandInfineon
HK$13.167
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N 33 A 100 V 52 mΩ TO-247AC Through Hole 3 -20 V, +20 V Enhancement 4V 2V 140 W Single 1
RS庫存編號 121-9547
製造零件編號DMP2305U-7
HK$0.561
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P 4.2 A 20 V 113 mΩ SOT-23 Surface Mount 3 -8 V, +8 V Enhancement 0.9V - 1.4 W Single 1
RS庫存編號 827-6154
製造零件編號TK17A65W,S5X(M
BrandToshiba
HK$28.83
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N 17 A 650 V 200 mΩ TO-220SIS Through Hole 3 -30 V, +30 V Enhancement 3.5V - 45 W Single 1
RS庫存編號 542-9412
製造零件編號IRF820APBF
BrandVishay
HK$14.54
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N 2.5 A 500 V 3 Ω TO-220AB Through Hole 3 -30 V, +30 V Enhancement - 2V 50 W Single 1
RS庫存編號 780-4742
製造零件編號NTR4003NT3G
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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 841-312
製造零件編號RFP70N06
HK$15.60
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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 753-3037
製造零件編號IPP100N10S305AKSA1
BrandInfineon
HK$32.43
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N 100 A 100 V 5.1 mΩ TO-220 Through Hole 3 -20 V, +20 V Enhancement 4V 2V 300 W Single 1
RS庫存編號 787-7529
製造零件編號MTM231232LBF
BrandPanasonic
HK$3.724
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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 178-0920
製造零件編號IRFD9110PBF
BrandVishay
HK$4.674
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RS庫存編號 486-2313
製造零件編號STP4NK60ZFP
HK$12.93
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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 165-6589
製造零件編號STD18N65M5
HK$9.692
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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 807-5879
製造零件編號FQP8P10
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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 485-7888
製造零件編號STP80NF10
HK$25.82
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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 823-5554
製造零件編號IPP80P03P4L04AKSA1
BrandInfineon
HK$18.288
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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 541-1180
製造零件編號IRF520NPBF
BrandInfineon
HK$8.46
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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 165-6746
製造零件編號IPP100N10S305AKSA1
BrandInfineon
HK$26.78
毎管:50 個
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N 100 A 100 V 5.1 mΩ TO-220 Through Hole 3 -20 V, +20 V Enhancement 4V 2V 300 W Single 1