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TSM8N80CI C0G
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N 8 A 800 V 1.5 Ω ITO-220 Through Hole 3 ±30 V Enhancement 4V 2V 40.3 W Single 1
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製造零件編號TSM70N380CI C0G
HK$29.344
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N 11 A 700 V 380 mΩ ITO-220 Through Hole 3 ±30 V Enhancement 4V 2V 33 W Single 1
RS庫存編號 171-3633
製造零件編號TSM650N15CS RLG
HK$4.56
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N 9 A 150 V 80 mΩ SOP Surface Mount 8 ±20 V Enhancement 4V 2V 12.5 W Single 1
RS庫存編號 171-3683
製造零件編號TSM126CX RFG
HK$2.793
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N 30 mA 600 V 800 Ω SOT-23 Surface Mount 3 ±20 V Depletion 1V 2.7V 500 mW Single 1
RS庫存編號 171-3686
製造零件編號TSM650N15CS RLG
HK$9.187
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N 9 A 150 V 80 mΩ SOP Surface Mount 8 ±20 V Enhancement 4V 2V 12.5 W Single 1
RS庫存編號 171-3620
製造零件編號TSM3N80CH C5G
HK$6.843
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N 3 A 800 V 4.2 mΩ TO-251 Through Hole 3 ±30 V Enhancement 4V 2V 94 W Single 1
RS庫存編號 743-6059
製造零件編號TSM2312CX RFG
HK$3.487
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N 4.9 A 20 V 51 mΩ SOT-23 Surface Mount 3 -8 V, +8 V Enhancement 1V - 750 mW Single 1
RS庫存編號 171-3721
製造零件編號TSM4NB60CI C0G
HK$7.429
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N 4 A 600 V 2.5 Ω ITO-220 Through Hole 3 ±30 V Enhancement 4.5V 2.5V 25 W Single 1
RS庫存編號 171-3642
製造零件編號TSM8N80CI C0G
HK$12.432
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N 8 A 800 V 1.5 Ω ITO-220 Through Hole 3 ±30 V Enhancement 4V 2V 40.3 W Single 1
RS庫存編號 743-6049
製造零件編號TSM3457CX6 RFG
HK$1.651
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P 5 A 30 V 100 mΩ SOT-26 Surface Mount 6 -20 V, +20 V Enhancement 3V - 2 W Single 1
RS庫存編號 171-3659
製造零件編號TSM090N03CP ROG
HK$5.89
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N 55 A 30 V 13 mΩ TO-252 Surface Mount 3 + Tab ±20 V Enhancement 2.5V 1V 40 W Single 1
RS庫存編號 171-3677
製造零件編號TSM120N06LCS RLG
HK$5.61
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N 23 A 60 V 15 mΩ SOP Surface Mount 8 ±20 V Enhancement 2.5V 1.2V 12.5 W Single 1
RS庫存編號 171-3688
製造零件編號TSM1NB60CH C5G
HK$8.722
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N 1 A 600 V 10 Ω TO-251 Through Hole 3 ±30 V Enhancement 4.5V 2.5V 39 W Single 1
RS庫存編號 171-3621
製造零件編號TSM4425CS RLG
HK$3.886
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N 11 A 30 V 19 mΩ SOP Surface Mount 8 ±20 V Enhancement 3V 1V 2.5 W Single 1
RS庫存編號 171-3622
製造零件編號TSM4436CS RLG
HK$1.891
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N 8 A 60 V 43 mΩ SOP Surface Mount 8 ±20 V Enhancement 3V 1V 2.5 W Single 1
RS庫存編號 171-3719
製造零件編號TSM4N80CI C0G
HK$13.058
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N 4 A 800 V 3 Ω ITO-220 Through Hole 3 ±30 V Enhancement 4V 2V 38.7 W Single 1
RS庫存編號 171-3614
製造零件編號TSM2303CX RFG
HK$0.95
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P 1.3 A 30 V 300 mΩ SOT-23 Surface Mount 3 ±20 V Enhancement 3V 1V 700 mW Single 1
RS庫存編號 171-3634
製造零件編號TSM6N60CP ROG
HK$7.098
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N 6 A 600 V 1.25 Ω TO-252 Surface Mount 3 + Tab ±30 V Enhancement 4V 2V 89 W Single 1
RS庫存編號 171-3619
製造零件編號TSM2N100CP ROG
HK$5.087
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N 1.85 A 1000 V 8.5 Ω TO-252 Surface Mount 3 + Tab ±30 V Enhancement 5.5V 3.5V 77 W Single 1
RS庫存編號 171-3641
製造零件編號TSM7N90CZ C0G
HK$13.716
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N 7 A 900 V 1.9 Ω TO-220 Through Hole 3 ±30 V Enhancement 4V 2V 250 W Single 1