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 Maximum Gate Threshold Voltage Minimum Gate Threshold Voltage Maximum Gate Source Voltage Package Type Mounting Type Pin Count Transistor Configuration Channel Mode Maximum Power Dissipation Automotive Standard
RS Stock No. 124-8751
Mfr. Part No.IPB120P04P4L03ATMA1
BrandInfineon
HK$9.16
Each (On a Reel of 1000)
units
P 120 A 40 V 5.2 mΩ 2.2V 1.2V -16 V, +16 V D2PAK (TO-263) Surface Mount 3 Single Enhancement 136 W -
RS Stock No. 168-6698
Mfr. Part No.STP80NF06
HK$15.738
Each (In a Tube of 50)
units
N 80 A 60 V 8 mΩ 4V 2V -20 V, +20 V TO-220 Through Hole 3 Single Enhancement 300 W -
RS Stock No. 166-3620
Mfr. Part No.FQP3P20
HK$6.257
Each (In a Tube of 50)
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P 1.8 A 200 V 2.7 Ω - 3V -30 V, +30 V TO-220 Through Hole 3 Single Enhancement 52 W -
RS Stock No. 780-4755
Mfr. Part No.NTS2101PT1G
HK$1.96
Each (In a Pack of 25)
units
P 1.5 A 8 V 210 mΩ - 0.45V -8 V, +8 V SOT-323 (SC-70) Surface Mount 3 Single Enhancement 330 mW -
RS Stock No. 145-0971
Mfr. Part No.C2M0280120D
BrandWolfspeed
HK$48.90
Each (In a Tube of 30)
units
N 10 A 1200 V 370 mΩ 4V 2V +25 V TO-247 Through Hole 3 Single Enhancement 62.5 W -
RS Stock No. 145-4533
Mfr. Part No.FQPF2N60C
HK$6.895
Each (In a Tube of 50)
units
N 2 A 600 V 4.7 Ω - 2V -30 V, +30 V TO-220F Through Hole 3 Single Enhancement 23 W -
RS Stock No. 687-5324
Mfr. Part No.STP80NF06
HK$18.995
Each (In a Pack of 2)
units
N 80 A 60 V 8 mΩ 4V 2V -20 V, +20 V TO-220 Through Hole 3 Single Enhancement 300 W -
RS Stock No. 671-5244
Mfr. Part No.FQPF2N60C
HK$8.52
Each (In a Pack of 5)
units
N 2 A 600 V 4.7 Ω - 2V -30 V, +30 V TO-220F Through Hole 3 Single Enhancement 23 W -
RS Stock No. 541-0159
Mfr. Part No.IRFBC40LCPBF
BrandVishay
HK$31.55
Each
units
N 6.2 A 600 V 1.2 Ω - 2V -30 V, +30 V TO-220AB Through Hole 3 Single Enhancement 125 W -
RS Stock No. 826-9092
Mfr. Part No.IPB120P04P4L03ATMA1
BrandInfineon
HK$12.561
Each (In a Pack of 10)
units
P 120 A 40 V 5.2 mΩ 2.2V 1.2V -16 V, +16 V D2PAK (TO-263) Surface Mount 3 Single Enhancement 136 W -
RS Stock No. 165-8401
Mfr. Part No.DMT6016LPS-13
HK$2.659
Each (On a Reel of 2500)
units
N 32 A 60 V 24 mΩ 2.5V 1V -20 V, +20 V POWERDI5060 Surface Mount 8 Single Enhancement 2.7 W -
RS Stock No. 917-5465
Mfr. Part No.FDG6320C
HK$2.263
Each (In a Pack of 50)
units
N, P 140 mA, 220 mA 25 V 4 Ω, 10 Ω - - -8 V, +8 V SOT-363 (SC-70) Surface Mount 6 Isolated Enhancement 300 mW -
RS Stock No. 807-5875
Mfr. Part No.FQP3P20
HK$5.998
Each (In a Pack of 10)
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P 1.8 A 200 V 2.7 Ω - 3V -30 V, +30 V TO-220 Through Hole 3 Single Enhancement 52 W -
RS Stock No. 163-1139
Mfr. Part No.NTS2101PT1G
HK$0.795
Each (On a Reel of 3000)
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P 1.5 A 8 V 210 mΩ - 0.45V -8 V, +8 V SOT-323 (SC-70) Surface Mount 3 Single Enhancement 330 mW -
RS Stock No. 915-8820
Mfr. Part No.C2M0280120D
BrandWolfspeed
HK$61.245
Each (In a Pack of 2)
units
N 10 A 1200 V 370 mΩ 4V 2V +25 V TO-247 Through Hole 3 Single Enhancement 62.5 W -
RS Stock No. 921-1173
Mfr. Part No.DMT6016LPS-13
HK$3.322
Each (In a Pack of 20)
units
N 32 A 60 V 24 mΩ 2.5V 1V -20 V, +20 V POWERDI5060 Surface Mount 8 Single Enhancement 2.7 W -
RS Stock No. 145-5690
Mfr. Part No.FDG6320C
HK$1.033
Each (On a Reel of 3000)
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N, P 140 mA, 220 mA 25 V 4 Ω, 10 Ω - - -8 V, +8 V SOT-363 (SC-70) Surface Mount 6 Isolated Enhancement 300 mW -
RS Stock No. 751-4240
Mfr. Part No.DMP2160UW-7
HK$1.655
Each (In a Pack of 50)
units
P 1.5 A 20 V 160 mΩ 0.9V - -12 V, +12 V SOT-323 (SC-70) Surface Mount 3 Single Enhancement 350 mW -
RS Stock No. 922-8373
Mfr. Part No.DMP2160UW-7
HK$0.695
Each (On a Reel of 3000)
units
P 1.5 A 20 V 160 mΩ 0.9V - -12 V, +12 V SOT-323 (SC-70) Surface Mount 3 Single Enhancement 350 mW -
RS Stock No. 124-1417
Mfr. Part No.FDD4141
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P 10.8 A 40 V 18.7 mΩ - 1V -20 V, +20 V DPAK (TO-252) Surface Mount 3 Single Enhancement 69 W -
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