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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Description Price Channel Type Maximum Continuous Drain Current Maximum Drain Source Voltage Maximum Drain Source Resistance Package Type Mounting Type Pin Count Maximum Gate Source Voltage Channel Mode Maximum Gate Threshold Voltage Minimum Gate Threshold Voltage Maximum Power Dissipation Transistor Configuration Number of Elements per Chip
RS Stock No. 169-7208
Mfr. Part No.PSMN5R6-100PS,127
BrandNexperia
HK$12.183
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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 Stock No. 798-3003
Mfr. Part No.PSMN5R6-100PS,127
BrandNexperia
HK$17.19
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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 Stock No. 798-2924
Mfr. Part No.PSMN1R8-30PL,127
BrandNexperia
HK$13.855
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N 100 A 30 V 1.8 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 2.15V 1.3V 270 W Single 1
RS Stock No. 169-7207
Mfr. Part No.PSMN3R4-30PL,127
BrandNexperia
HK$8.889
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N 100 A 30 V 4.1 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 2.15V 1.3V 114 W Single 1
RS Stock No. 166-0269
Mfr. Part No.PHN210T,118
BrandNexperia
HK$3.299
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N 3.4 A 30 V 100 mΩ SOIC Surface Mount 8 -20 V, +20 V Enhancement 2.8V 1V 2 W Isolated 2
RS Stock No. 725-8376
Mfr. Part No.PHN210T,118
BrandNexperia
HK$5.262
Each (In a Pack of 5)
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N 3.4 A 30 V 100 mΩ SOIC Surface Mount 8 -20 V, +20 V Enhancement 2.8V 1V 2 W Isolated 2
RS Stock No. 103-8398
Mfr. Part No.2N7002,215
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HK$0.269
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N 300 mA 60 V 5 Ω SOT-23 (TO-236AB) Surface Mount 3 -30 V, +30 V Enhancement 2.5V 1V 830 mW Single 1
RS Stock No. 798-2959
Mfr. Part No.PSMN3R4-30PL,127
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HK$9.78
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N 100 A 30 V 4.1 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 2.15V 1.3V 114 W Single 1
RS Stock No. 169-7205
Mfr. Part No.PSMN1R8-30PL,127
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HK$11.759
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N 100 A 30 V 1.8 mΩ TO-220AB Through Hole 3 -20 V, +20 V Enhancement 2.15V 1.3V 270 W Single 1
RS Stock No. 436-7379
Mfr. Part No.2N7002,215
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HK$0.848
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N 300 mA 60 V 5 Ω SOT-23 (TO-236AB) Surface Mount 3 -30 V, +30 V Enhancement 2.5V 1V 830 mW Single 1
RS Stock No. 124-2289
Mfr. Part No.BSS138BK,215
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HK$0.446
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N 360 mA 60 V 1.6 Ω SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 1.6V 0.48V 420 mW Single 1
RS Stock No. 792-0894
Mfr. Part No.BSS138BK,215
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HK$0.792
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N 360 mA 60 V 1.6 Ω SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 1.6V 0.48V 420 mW Single 1
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Mfr. Part No.BSS138PS,115
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HK$1.162
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N 320 mA 60 V 1.6 Ω SOT-363 (SC-88) Surface Mount 6 -20 V, +20 V Enhancement 1.5V 0.9V 320 mW Isolated 2
RS Stock No. 165-9977
Mfr. Part No.NX3008PBKW,115
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HK$0.446
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P 200 mA 30 V 6.5 Ω SOT-323 (SC-70) Surface Mount 3 -8 V, +8 V Enhancement 1.1V 0.6V 830 mW Single 1
RS Stock No. 725-8366
Mfr. Part No.BSH203,215
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HK$2.194
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P 470 mA 30 V 900 mΩ SOT-23 (TO-236AB) Surface Mount 3 -8 V, +8 V Enhancement 0.68V 0.4V 417 mW Single 1
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Mfr. Part No.NX3008PBKW,115
BrandNexperia
HK$0.595
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P 200 mA 30 V 6.5 Ω SOT-323 (SC-70) Surface Mount 3 -8 V, +8 V Enhancement 1.1V 0.6V 830 mW Single 1
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Mfr. Part No.BSH203,215
BrandNexperia
HK$1.126
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P 470 mA 30 V 900 mΩ SOT-23 (TO-236AB) Surface Mount 3 -8 V, +8 V Enhancement 0.68V 0.4V 417 mW Single 1
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N 360 mA 60 V 1.6 Ω SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 1.5V 0.9V 420 mW Single 1
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P 2 A 20 V 120 mΩ SOT-23 Surface Mount 3 -8 V, +8 V Enhancement 1.1V 0.5V 400 mW Single 1
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BrandNexperia
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N 320 mA 60 V 1.6 Ω SOT-363 (SC-88) Surface Mount 6 -20 V, +20 V Enhancement 1.5V 0.9V 320 mW Isolated 2