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. 921-1173
Mfr. Part No.DMT6016LPS-13
HK$3.322
Each (In a Pack of 20)
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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. 922-8373
Mfr. Part No.DMP2160UW-7
HK$0.69
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. 751-4240
Mfr. Part No.DMP2160UW-7
HK$1.655
Each (In a Pack of 50)
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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. 921-1120
Mfr. Part No.DMN6140L-7
HK$1.608
Each (In a Pack of 50)
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N 2.9 A 60 V 170 mΩ SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 3V 1V 1.3 W Single 1
RS Stock No. 121-9547
Mfr. Part No.DMP2305U-7
HK$0.555
Each (On a Reel of 3000)
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P 4.2 A 20 V 113 mΩ SOT-23 Surface Mount 3 -8 V, +8 V Enhancement 0.9V - 1.4 W Single 1
RS Stock No. 165-8440
Mfr. Part No.DMN6140L-7
HK$0.496
Each (On a Reel of 3000)
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N 2.9 A 60 V 170 mΩ SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 3V 1V 1.3 W Single 1
RS Stock No. 751-4256
Mfr. Part No.DMP2305U-7
HK$0.922
Each (In a Pack of 100)
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P 4.2 A 20 V 113 mΩ SOT-23 Surface Mount 3 -8 V, +8 V Enhancement 0.9V - 1.4 W Single 1
RS Stock No. 122-1475
Mfr. Part No.DMP3010LK3-13
HK$2.613
Each (On a Reel of 2500)
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P 17 A 30 V 10.2 mΩ DPAK (TO-252) Surface Mount 3 -20 V, +20 V Enhancement 1.6V - 3.4 W Single 1
RS Stock No. 121-9587
Mfr. Part No.BSN20-7
HK$0.393
Each (On a Reel of 3000)
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N 500 mA 50 V 2 Ω SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 1.5V - 920 mW Single 1
RS Stock No. 922-7689
Mfr. Part No.ZVN2106A
HK$2.398
Each (In a Bag of 4000)
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N 450 mA 60 V 2 Ω E-Line Through Hole 3 -20 V, +20 V Enhancement 2.4V - 700 mW Single 1
RS Stock No. 165-8383
Mfr. Part No.DMT6010LFG-7
HK$2.472
Each (On a Reel of 2000)
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N 30 A 60 V 11.5 mΩ POWERDI3333 Surface Mount 8 -20 V, +20 V Enhancement 2V 0.8V 41 W Single 1
RS Stock No. 921-1161
Mfr. Part No.DMT6010LFG-7
HK$4.838
Each (In a Pack of 20)
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N 30 A 60 V 11.5 mΩ POWERDI3333 Surface Mount 8 -20 V, +20 V Enhancement 2V 0.8V 41 W Single 1
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Mfr. Part No.DMP3010LK3-13
HK$5.365
Each (In a Pack of 10)
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P 17 A 30 V 10.2 mΩ DPAK (TO-252) Surface Mount 3 -20 V, +20 V Enhancement 1.6V - 3.4 W Single 1
RS Stock No. 921-1105
Mfr. Part No.DMN53D0LDW-7
HK$0.924
Each (In a Pack of 100)
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N 360 mA 50 V 4.5 Ω SOT-363 (SC-88) Surface Mount 6 -20 V, +20 V Enhancement 1.5V 0.8V 310 mW Single 1
RS Stock No. 146-0595
Mfr. Part No.DMN53D0LDW-7
HK$0.391
Each (On a Reel of 3000)
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N 360 mA 50 V 4.5 Ω SOT-363 (SC-88) Surface Mount 6 -20 V, +20 V Enhancement 1.5V 0.8V 310 mW Single 1
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N 500 mA 50 V 2 Ω SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 1.5V - 920 mW Single 1
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P 90 mA 60 V 14 Ω SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 3.5V - 330 mW Single 1
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P 90 mA 60 V 14 Ω SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 3.5V - 330 mW Single 1