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. 809-0880
Mfr. Part No.FDD4141
HK$6.811
Each (In a Pack of 10)
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P 10.8 A 40 V 18.7 mΩ DPAK (TO-252) Surface Mount 3 -20 V, +20 V Enhancement - 1V 69 W Single 1
RS Stock No. 124-1417
Mfr. Part No.FDD4141
HK$3.646
Each (On a Reel of 2500)
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P 10.8 A 40 V 18.7 mΩ DPAK (TO-252) Surface Mount 3 -20 V, +20 V Enhancement - 1V 69 W Single 1
RS Stock No. 124-8751
Mfr. Part No.IPB120P04P4L03ATMA1
BrandInfineon
HK$11.652
Each (On a Reel of 1000)
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P 120 A 40 V 5.2 mΩ D2PAK (TO-263) Surface Mount 3 -16 V, +16 V Enhancement 2.2V 1.2V 136 W Single 1
RS Stock No. 915-8820
Mfr. Part No.C2M0280120D
BrandWolfspeed
HK$45.67
Each (In a Pack of 2)
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N 10 A 1200 V 370 mΩ TO-247 Through Hole 3 +25 V Enhancement 4V 2V 62.5 W Single 1
RS Stock No. 807-5875
Mfr. Part No.FQP3P20
HK$5.998
Each (In a Pack of 10)
units
P 1.8 A 200 V 2.7 Ω TO-220 Through Hole 3 -30 V, +30 V Enhancement - 3V 52 W Single 1
RS Stock No. 922-8373
Mfr. Part No.DMP2160UW-7
HK$0.703
Each (On a Reel of 3000)
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P 1.5 A 20 V 160 mΩ SOT-323 (SC-70) Surface Mount 3 -12 V, +12 V Enhancement 0.9V - 350 mW Single 1
RS Stock No. 165-8401
Mfr. Part No.DMT6016LPS-13
HK$2.659
Each (On a Reel of 2500)
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N 32 A 60 V 24 mΩ POWERDI5060 Surface Mount 8 -20 V, +20 V Enhancement 2.5V 1V 2.7 W Single 1
RS Stock No. 541-0159
Mfr. Part No.IRFBC40LCPBF
BrandVishay
HK$35.05
Each
units
N 6.2 A 600 V 1.2 Ω TO-220AB Through Hole 3 -30 V, +30 V Enhancement - 2V 125 W Single 1
RS Stock No. 671-5244
Mfr. Part No.FQPF2N60C
HK$9.556
Each (In a Pack of 5)
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N 2 A 600 V 4.7 Ω TO-220F Through Hole 3 -30 V, +30 V Enhancement - 2V 23 W Single 1
RS Stock No. 166-3620
Mfr. Part No.FQP3P20
HK$6.00
Each (In a Tube of 50)
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P 1.8 A 200 V 2.7 Ω TO-220 Through Hole 3 -30 V, +30 V Enhancement - 3V 52 W Single 1
RS Stock No. 145-0971
Mfr. Part No.C2M0280120D
BrandWolfspeed
HK$45.67
Each (In a Tube of 30)
units
N 10 A 1200 V 370 mΩ TO-247 Through Hole 3 +25 V Enhancement 4V 2V 62.5 W Single 1
RS Stock No. 921-1173
Mfr. Part No.DMT6016LPS-13
HK$4.361
Each (In a Pack of 20)
units
N 32 A 60 V 24 mΩ POWERDI5060 Surface Mount 8 -20 V, +20 V Enhancement 2.5V 1V 2.7 W Single 1
RS Stock No. 780-4755
Mfr. Part No.NTS2101PT1G
HK$2.656
Each (In a Pack of 25)
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P 1.5 A 8 V 210 mΩ SOT-323 (SC-70) Surface Mount 3 -8 V, +8 V Enhancement - 0.45V 330 mW Single 1
RS Stock No. 826-9092
Mfr. Part No.IPB120P04P4L03ATMA1
BrandInfineon
HK$20.46
Each (In a Pack of 10)
units
P 120 A 40 V 5.2 mΩ D2PAK (TO-263) Surface Mount 3 -16 V, +16 V Enhancement 2.2V 1.2V 136 W Single 1
RS Stock No. 163-1139
Mfr. Part No.NTS2101PT1G
HK$0.797
Each (On a Reel of 3000)
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P 1.5 A 8 V 210 mΩ SOT-323 (SC-70) Surface Mount 3 -8 V, +8 V Enhancement - 0.45V 330 mW Single 1
RS Stock No. 145-5690
Mfr. Part No.FDG6320C
HK$1.039
Each (On a Reel of 3000)
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N, P 140 mA, 220 mA 25 V 4 Ω, 10 Ω SOT-363 (SC-70) Surface Mount 6 -8 V, +8 V Enhancement - - 300 mW Isolated 2
RS Stock No. 145-4533
Mfr. Part No.FQPF2N60C
HK$8.222
Each (In a Tube of 50)
units
N 2 A 600 V 4.7 Ω TO-220F Through Hole 3 -30 V, +30 V Enhancement - 2V 23 W Single 1
RS Stock No. 917-5465
Mfr. Part No.FDG6320C
HK$2.95
Each (In a Pack of 50)
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N, P 140 mA, 220 mA 25 V 4 Ω, 10 Ω SOT-363 (SC-70) Surface Mount 6 -8 V, +8 V Enhancement - - 300 mW Isolated 2
RS Stock No. 687-5324
Mfr. Part No.STP80NF06
HK$24.57
Each (In a Pack of 2)
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N 80 A 60 V 8 mΩ TO-220 Through Hole 3 -20 V, +20 V Enhancement 4V 2V 300 W Single 1
RS Stock No. 168-6698
Mfr. Part No.STP80NF06
HK$20.884
Each (In a Tube of 50)
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N 80 A 60 V 8 mΩ TO-220 Through Hole 3 -20 V, +20 V Enhancement 4V 2V 300 W Single 1
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