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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N 21 A 560 V 190 mΩ TO-247 Through Hole 3 -30 V, +30 V Enhancement 3.9V 2.1V 208 W Single 1
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製造零件編號SPW21N50C3FKSA1
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N 21 A 560 V 190 mΩ TO-247 Through Hole 3 -30 V, +30 V Enhancement 3.9V 2.1V 208 W Single 1
RS庫存編號 124-9056
製造零件編號IRFS7530TRL7PP
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N 240 A 60 V 1.4 mΩ D2PAK (TO-263) Surface Mount 7 -20 V, +20 V Enhancement 3.7V 2.1V 375 W Single 1
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製造零件編號2N7002H6327XTSA2
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N 300 mA 60 V 4 Ω SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 2.5V 1.5V 500 mW Single 1
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N 300 mA 60 V 4 Ω SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 2.5V 1.5V 500 mW Single 1
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製造零件編號SPW20N60S5FKSA1
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N 20 A 600 V 190 mΩ TO-247 Through Hole 3 -20 V, +20 V Enhancement 5.5V 3.5V 208 W Single 1
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N 18 A 200 V 150 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 4V 2V 150 W Single 1
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N 20 A 600 V 190 mΩ TO-247 Through Hole 3 -20 V, +20 V Enhancement 5.5V 3.5V 208 W Single 1
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N 18 A 200 V 150 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 4V 2V 150 W Single 1
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P 23 A 100 V 117 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 4V 2V 140 W Single 1
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P 23 A 100 V 117 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 4V 2V 140 W Single 1
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N 18.5 A 550 V 190 mΩ TO-247 Through Hole 3 -30 V, +30 V Enhancement 3.5V 2.5V 127 W Single 1
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製造零件編號IPW60R190P6FKSA1
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N 20 A 650 V 190 mΩ TO-247 Through Hole 3 -30 V, +30 V Enhancement 4.5V 3.5V 151 W Single 1
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製造零件編號IRLB3034PBF
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N 343 A 40 V 2 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 2.5V 1V 375 W Single 1
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N 343 A 40 V 2 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 2.5V 1V 375 W Single 1
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製造零件編號IPW50R190CEFKSA1
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N 18.5 A 550 V 190 mΩ TO-247 Through Hole 3 -30 V, +30 V Enhancement 3.5V 2.5V 127 W Single 1
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製造零件編號IRFS7530TRL7PP
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N 240 A 60 V 1.4 mΩ D2PAK (TO-263) Surface Mount 7 -20 V, +20 V Enhancement 3.7V 2.1V 375 W Single 1
RS庫存編號 145-8600
製造零件編號IPW60R190P6FKSA1
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N 20 A 650 V 190 mΩ TO-247 Through Hole 3 -30 V, +30 V Enhancement 4.5V 3.5V 151 W Single 1
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製造零件編號IPW60R190C6FKSA1
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N 20.2 A 650 V 190 mΩ TO-247 Through Hole 3 -20 V, +20 V Enhancement 3.5V 2.5V 151 W Single 1
RS庫存編號 543-0068
製造零件編號IRF630NPBF
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N 9.3 A 200 V 300 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 4V 2V 82 W Single 1