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. 145-8766
Mfr. Part No.BSS606NH6327XTSA1
BrandInfineon
HK$1.40
Each (On a Reel of 1000)
units
N 3.2 A 60 V 90 mΩ 2.3V 1.3V -20 V, +20 V PG-SOT-89 Surface Mount 4 Single Enhancement 1 W -
RS Stock No. 110-7170
Mfr. Part No.BSS606NH6327XTSA1
BrandInfineon
HK$3.285
Each (In a Pack of 50)
units
N 3.2 A 60 V 90 mΩ 2.3V 1.3V -20 V, +20 V PG-SOT-89 Surface Mount 4 Single Enhancement 1 W -
RS Stock No. 739-0224
Mfr. Part No.2N7000TA
HK$1.582
Each (In a Pack of 10)
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N 200 mA 60 V 5 Ω - 0.3V -30 V, +30 V TO-92 Through Hole 3 Single Enhancement 400 mW -
RS Stock No. 903-4074
Mfr. Part No.2N7000-D26Z
HK$0.974
Each (In a Pack of 100)
units
N 200 mA 60 V 9 Ω - 0.8V -40 V, +40 V TO-92 Through Hole 3 Single Enhancement 400 mW -
RS Stock No. 169-8553
Mfr. Part No.2N7000
HK$0.653
Each (On a Reel of 10000)
units
N 200 mA 60 V 5 Ω - 0.8V -20 V, +20 V TO-92 Through Hole 3 Single Enhancement 400 mW -
RS Stock No. 671-4733
Mfr. Part No.2N7000
HK$1.982
Each (In a Pack of 20)
units
N 200 mA 60 V 5 Ω - 0.8V -20 V, +20 V TO-92 Through Hole 3 Single Enhancement 400 mW -
RS Stock No. 124-1310
Mfr. Part No.2N7000TA
HK$0.526
Each (On a Reel of 2000)
units
N 200 mA 60 V 5 Ω - 0.3V -30 V, +30 V TO-92 Through Hole 3 Single Enhancement 400 mW -
RS Stock No. 124-9024
Mfr. Part No.IRLB3034PBF
BrandInfineon
HK$19.674
Each (In a Tube of 50)
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N 343 A 40 V 2 mΩ 2.5V 1V -20 V, +20 V TO-220AB Through Hole 3 Single Enhancement 375 W -
RS Stock No. 688-7204
Mfr. Part No.IRLB3034PBF
BrandInfineon
HK$20.675
Each (In a Pack of 2)
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N 343 A 40 V 2 mΩ 2.5V 1V -20 V, +20 V TO-220AB Through Hole 3 Single Enhancement 375 W -
RS Stock No. 891-2885
Mfr. Part No.TK14A65W,S5X(M
BrandToshiba
HK$13.966
Each (In a Pack of 5)
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N 13.7 A 650 V 250 mΩ 3.5V - -30 V, +30 V TO-220SIS Through Hole 3 Single Enhancement 40 W -
RS Stock No. 913-3932
Mfr. Part No.IRFB4227PBF
BrandInfineon
HK$16.596
Each (In a Tube of 50)
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N 65 A 200 V 24 mΩ 5V 3V -30 V, +30 V TO-220AB Through Hole 3 Single Enhancement 330 W -
RS Stock No. 178-0790
Mfr. Part No.IRFP264PBF
BrandVishay
HK$37.446
Each (In a Tube of 25)
units
N 38 A 250 V 75 mΩ - 2V -20 V, +20 V TO-247AC Through Hole 3 Single Enhancement 280 W -
RS Stock No. 650-4277
Mfr. Part No.IRFB4227PBF
BrandInfineon
HK$24.39
Each
units
N 65 A 200 V 24 mΩ 5V 3V -30 V, +30 V TO-220AB Through Hole 3 Single Enhancement 330 W -
RS Stock No. 542-9787
Mfr. Part No.IRFP264PBF
BrandVishay
HK$31.68
Each
units
N 38 A 250 V 75 mΩ - 2V -20 V, +20 V TO-247AC Through Hole 3 Single Enhancement 280 W -
RS Stock No. 145-5451
Mfr. Part No.FQP3N30
HK$6.733
Each (In a Tube of 50)
units
N 3.2 A 300 V 2.2 Ω - 3V -30 V, +30 V TO-220 Through Hole 3 Single Enhancement 55 W -
RS Stock No. 807-5872
Mfr. Part No.FQP3N30
HK$5.328
Each (In a Pack of 10)
units
N 3.2 A 300 V 2.2 Ω - 3V -30 V, +30 V TO-220 Through Hole 3 Single Enhancement 55 W -
RS Stock No. 178-0831
Mfr. Part No.IRF740APBF
BrandVishay
HK$11.085
Each (In a Tube of 50)
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N 10 A 400 V 550 mΩ - 2V -30 V, +30 V TO-220AB Through Hole 3 Single Enhancement 125 W -
RS Stock No. 542-9399
Mfr. Part No.IRF740APBF
BrandVishay
HK$13.11
Each
units
N 10 A 400 V 550 mΩ - 2V -30 V, +30 V TO-220AB Through Hole 3 Single Enhancement 125 W -
RS Stock No. 708-5156
Mfr. Part No.IRFP250PBF
BrandVishay
HK$25.654
Each (In a Pack of 5)
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N 30 A 200 V 85 mΩ - 2V -20 V, +20 V TO-247AC Through Hole 3 Single Enhancement 190 W -
RS Stock No. 919-0032
Mfr. Part No.IRFP250PBF
BrandVishay
HK$17.513
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N 30 A 200 V 85 mΩ - 2V -20 V, +20 V TO-247AC Through Hole 3 Single Enhancement 190 W -
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