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 Maximum Gate Threshold Voltage Mounting Type Minimum Gate Threshold Voltage Pin Count Maximum Gate Source Voltage Channel Mode Maximum Power Dissipation Transistor Configuration Number of Elements per Chip
RS stock no. 761-0184
Mfr. Part No.STP80NF12
R 31.974
Each (In a Pack of 5)
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N 80 A 120 V 18 mΩ TO-220 - Through Hole 2V 3 -20 V, +20 V Enhancement 300 W Single 1
RS stock no. 168-7519
Mfr. Part No.STP80NF12
R 9.987
Each (In a Tube of 50)
units
N 80 A 120 V 18 mΩ TO-220 - Through Hole 2V 3 -20 V, +20 V Enhancement 300 W Single 1
RS stock no. 920-8789
Mfr. Part No.STP55NF06
R 13.855
Each (In a Tube of 50)
units
N 50 A 60 V 18 mΩ TO-220 4V Through Hole 2V 3 -20 V, +20 V Enhancement 110 W Single 1
RS stock no. 485-7715
Mfr. Part No.STP55NF06
R 16.60
Each (In a Pack of 5)
units
N 50 A 60 V 18 mΩ TO-220 4V Through Hole 2V 3 -20 V, +20 V Enhancement 110 W Single 1
RS stock no. 920-8795
Mfr. Part No.STP55NF06L
R 19.169
Each (In a Tube of 50)
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N 55 A 60 V 18 mΩ TO-220 - Through Hole 1V 3 -16 V, +16 V Enhancement 95 W Single 1
RS stock no. 485-7721
Mfr. Part No.STP55NF06L
R 23.65
Each (In a Pack of 5)
units
N 55 A 60 V 18 mΩ TO-220 - Through Hole 1V 3 -16 V, +16 V Enhancement 95 W Single 1
RS stock no. 168-8071
Mfr. Part No.STW10N95K5
R 63.37
Each (In a Tube of 30)
units
N 8 A 950 V 800 mΩ TO-247 5V Through Hole 3V 3 -30 V, +30 V Enhancement 130 W Single 1
RS stock no. 829-1481
Mfr. Part No.STW10N95K5
R 67.24
Each (In a Pack of 2)
units
N 8 A 950 V 800 mΩ TO-247 5V Through Hole 3V 3 -30 V, +30 V Enhancement 130 W Single 1
RS stock no. 168-6688
Mfr. Part No.STB9NK50ZT4
R 10.852
Each (On a Reel of 1000)
units
N 7.2 A 500 V 850 mΩ D2PAK (TO-263) 4.5V Surface Mount 3V 3 -30 V, +30 V Enhancement 110 W Single 1
RS stock no. 687-5184
Mfr. Part No.STB9NK50ZT4
R 32.922
Each (In a Pack of 5)
units
N 7.2 A 500 V 850 mΩ D2PAK (TO-263) 4.5V Surface Mount 3V 3 -30 V, +30 V Enhancement 110 W Single 1
RS stock no. 485-7844
Mfr. Part No.STP75NF75
R 31.28
Each
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N 80 A 75 V 11 mΩ TO-220 4V Through Hole 2V 3 -20 V, +20 V Enhancement 300 W Single 1
RS stock no. 920-8840
Mfr. Part No.STP75NF75
R 6.718
Each (In a Tube of 50)
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N 80 A 75 V 11 mΩ TO-220 4V Through Hole 2V 3 -20 V, +20 V Enhancement 300 W Single 1
RS stock no. 485-8623
Mfr. Part No.STW9NK90Z
R 39.43
Each
units
N 8 A 900 V 1.3 Ω TO-247 4.5V Through Hole 3V 3 -30 V, +30 V Enhancement 160 W Single 1
RS stock no. 920-8862
Mfr. Part No.STW9NK90Z
R 40.778
Each (In a Tube of 30)
units
N 8 A 900 V 1.3 Ω TO-247 4.5V Through Hole 3V 3 -30 V, +30 V Enhancement 160 W Single 1
RS stock no. 168-8819
Mfr. Part No.STH150N10F7-2
R 17.707
Each (On a Reel of 1000)
units
N 110 A 100 V 3.9 mΩ H2PAK 4.5V Surface Mount 2.5V 3 -20 V, +20 V Enhancement 250 W Single 1
RS stock no. 860-7523
Mfr. Part No.STH150N10F7-2
R 18.035
Each (In a Pack of 2)
units
N 110 A 100 V 3.9 mΩ H2PAK 4.5V Surface Mount 2.5V 3 -20 V, +20 V Enhancement 250 W Single 1
RS stock no. 103-1573
Mfr. Part No.STW13NK100Z
R 110.35
Each (In a Tube of 30)
units
N 13 A 1000 V 700 mΩ TO-247 4.5V Through Hole 3V 3 -30 V, +30 V Enhancement 350 W Single 1
RS stock no. 687-5248
Mfr. Part No.STW13NK100Z
R 122.40
Each
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N 13 A 1000 V 700 mΩ TO-247 4.5V Through Hole 3V 3 -30 V, +30 V Enhancement 350 W Single 1
RS stock no. 687-5311
Mfr. Part No.STP80NF10FP
R 45.105
Each (In a Pack of 2)
units
N 80 A 100 V 15 mΩ TO-220FP 4V Through Hole 2V 3 -20 V, +20 V Enhancement 45 W Single 1
RS stock no. 920-6572
Mfr. Part No.STP80NF10FP
R 11.077
Each (In a Tube of 50)
units
N 80 A 100 V 15 mΩ TO-220FP 4V Through Hole 2V 3 -20 V, +20 V Enhancement 45 W Single 1