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IRFP260NPBF
BrandInfineon
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N 50 A 200 V 40 mΩ TO-247AC Through Hole 3 -20 V, +20 V Enhancement 4V 2V 300 W Single 1
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製造零件編號BSS225H6327FTSA1
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N 90 mA 600 V 45 Ω SOT-89 Surface Mount 3 -20 V, +20 V Enhancement 2.3V 1.3V 1 W Single 1
RS庫存編號 145-4305
製造零件編號FQP2N90
HK$6.559
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N 2.2 A 900 V 7.2 Ω TO-220AB Through Hole 3 -30 V, +30 V Enhancement - 3V 85 W Single 1
RS庫存編號 122-0600
製造零件編號ZXMN10A11GTA
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N 2.4 A 100 V 450 mΩ SOT-223 Surface Mount 3 + Tab -20 V, +20 V Enhancement 4V - 3.9 W Single 1
RS庫存編號 796-5070
製造零件編號TK100E10N1
BrandToshiba
HK$32.81
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N 207 A 100 V 3.4 mΩ TO-220 Through Hole 3 -20 V, +20 V Enhancement 4V - 255 W Single 1
RS庫存編號 168-8748
製造零件編號IRLL014NTRPBF
BrandInfineon
HK$1.821
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N 2.8 A 55 V 280 mΩ SOT-223 Surface Mount 3 + Tab -16 V, +16 V Enhancement 2V 1V 2.1 W Single 1
RS庫存編號 145-8632
製造零件編號IPA60R160C6XKSA1
BrandInfineon
HK$18.782
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N 24 A 650 V 160 mΩ TO-220FP Through Hole 3 -20 V, +20 V Enhancement 3.5V 2.5V 176 W Single 1
RS庫存編號 145-9344
製造零件編號AUIRFP4409
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HK$33.15
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N 38 A 300 V 69 mΩ TO-247 Through Hole 3 -20 V, +20 V Enhancement - - 341 W Single 1
RS庫存編號 760-9566
製造零件編號STD2NK60Z-1
HK$3.93
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N 1.4 A 600 V 8 Ω TO-251 Through Hole 3 -30 V, +30 V Enhancement 4.5V 3V 45 W - 1
RS庫存編號 688-6813
製造零件編號IRF1404ZPBF
BrandInfineon
HK$13.47
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N 190 A 40 V 4 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 4V 2V 220 W Single 1
RS庫存編號 807-5914
製造零件編號FQPF9N90CT
HK$23.796
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N 8 A 900 V 1.4 Ω TO-220F Through Hole 3 -30 V, +30 V Enhancement - 3V 68 W Single 1
RS庫存編號 688-6942
製造零件編號IRFB4229PBF
BrandInfineon
HK$27.89
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N 46 A 250 V 46 mΩ TO-220AB Through Hole 3 -30 V, +30 V Enhancement 5V 3V 330 W Single 1
RS庫存編號 121-6303
製造零件編號NTGS5120PT1G
HK$1.34
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P 2.9 A 60 V 142 mΩ TSOP Surface Mount 6 -20 V, +20 V Enhancement 3V - 1.4 W Single 1
RS庫存編號 891-2894
製造零件編號TK14A65W5,S5X(M
BrandToshiba
HK$11.816
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N 13.7 A 650 V 300 mΩ TO-220SIS Through Hole 3 -30 V, +30 V Enhancement 3.5V - 40 W Single 1
RS庫存編號 829-7085
製造零件編號STF15N80K5
HK$31.41
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N 14 A 800 V 375 mΩ TO-220FP Through Hole 3 -30 V, +30 V Enhancement 5V 3V 35 W Single 1
RS庫存編號 301-316
製造零件編號IRLML6401TRPBF
BrandInfineon
HK$2.40
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P 4.3 A 12 V 50 mΩ Micro Surface Mount 3 -8 V, +8 V Enhancement 0.95V 0.4V 1.3 W Single 1
RS庫存編號 162-8966
製造零件編號MVGSF1N03LT1G
HK$2.355
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N 2.1 A 30 V 145 mΩ SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 2.4V - 690 mW Single 1
RS庫存編號 759-9083
製造零件編號FDD5670
HK$16.39
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N 52 A 60 V 26 mΩ DPAK (TO-252) Surface Mount 3 -20 V, +20 V Enhancement - 2V 83 W Single 1
RS庫存編號 485-7490
製造零件編號STP13NK60Z
HK$18.068
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N 13 A 600 V 550 mΩ TO-220 Through Hole 3 -30 V, +30 V Enhancement 4.5V 3V 150 W Single 1
RS庫存編號 920-0870
製造零件編號IXFK48N50
BrandIXYS
HK$141.608
毎管:25 個
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N 48 A 500 V 100 mΩ TO-264AA Through Hole 3 -20 V, +20 V Enhancement 4V - 500 W Single 1