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. 162-9714
Mfr. Part No.C3M0280090D
BrandWolfspeed
£2.665
Each (In a Tube of 30)
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N 11.5 A 900 V 360 mΩ TO-247 Through Hole 3 -8 V, +18 V Enhancement 3.5V 1.8V 54 W Single 1
RS Stock No. 915-8842
Mfr. Part No.C3M0280090D
BrandWolfspeed
£2.855
Each (In a Pack of 2)
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N 11.5 A 900 V 360 mΩ TO-247 Through Hole 3 -8 V, +18 V Enhancement 3.5V 1.8V 54 W Single 1
RS Stock No. 145-6660
Mfr. Part No.C2M1000170D
BrandWolfspeed
£4.055
Each (In a Tube of 30)
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N 5 A 1700 V 1.4 Ω TO-247 Through Hole 3 -5 V, +20 V Enhancement 3.1V 2.4V 69 W Single 1
RS Stock No. 162-9721
Mfr. Part No.CAS300M12BM2
BrandWolfspeed
£489.271
Each (In a Box of 10)
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N 404 A 1200 V 9.8 mΩ Half Bridge Panel Mount 7 -10 V, +25 V Enhancement 2.3V 1.8V 1.66 kW Series 2
RS Stock No. 916-3872
Mfr. Part No.CAS300M12BM2
BrandWolfspeed
£519.53
Each
Units
N 404 A 1200 V 9.8 mΩ Half Bridge Panel Mount 7 -10 V, +25 V Enhancement 2.3V 1.8V 1.66 kW Series 2
RS Stock No. 904-7345
Mfr. Part No.C2M1000170D
BrandWolfspeed
£4.32
Each
Units
N 5 A 1700 V 1.4 Ω TO-247 Through Hole 3 -5 V, +20 V Enhancement 3.1V 2.4V 69 W Single 1
RS Stock No. 919-9749
Mfr. Part No.C2M0080120D
BrandWolfspeed
£13.908
Each (In a Tube of 30)
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N 31 A 1200 V 208 mΩ TO-247 Through Hole 3 -10 V, +25 V Enhancement 3.2V 1.7V 208 W Single 1
RS Stock No. 809-8991
Mfr. Part No.C2M0080120D
BrandWolfspeed
£15.25
Each
Units
N 31 A 1200 V 208 mΩ TO-247 Through Hole 3 -10 V, +25 V Enhancement 3.2V 1.7V 208 W Single 1
RS Stock No. 915-8820
Mfr. Part No.C2M0280120D
BrandWolfspeed
£4.465
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. 145-0971
Mfr. Part No.C2M0280120D
BrandWolfspeed
£4.143
Each (In a Tube of 30)
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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. 145-6863
Mfr. Part No.C2M0025120D
BrandWolfspeed
£52.195
Each (In a Tube of 30)
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N 90 A 1200 V 34 mΩ TO-247 Through Hole 3 +25 V Enhancement 4V 2V 463 W Single 1
RS Stock No. 915-8818
Mfr. Part No.C2M0025120D
BrandWolfspeed
£57.41
Each
Units
N 90 A 1200 V 34 mΩ TO-247 Through Hole 3 +25 V Enhancement 4V 2V 463 W Single 1
RS Stock No. 904-7348
Mfr. Part No.C2M0160120D
BrandWolfspeed
£6.85
Each
Units
N 19 A 1200 V 196 mΩ TO-247 Through Hole 3 -5 V, +20 V Enhancement 2.5V 2.4V 125 W Single 1
RS Stock No. 162-9709
Mfr. Part No.C2M0160120D
BrandWolfspeed
£6.359
Each (In a Tube of 30)
Units
N 19 A 1200 V 196 mΩ TO-247 Through Hole 3 -5 V, +20 V Enhancement 2.5V 2.4V 125 W Single 1
RS Stock No. 162-9712
Mfr. Part No.C3M0065090D
BrandWolfspeed
£7.606
Each (In a Tube of 30)
Units
N 36 A 900 V 78 mΩ TO-247 Through Hole 3 -8 V, +18 V Enhancement 2.1V 1.8V 125 W Single 1
RS Stock No. 915-8836
Mfr. Part No.C3M0065090D
BrandWolfspeed
£8.21
Each
Units
N 36 A 900 V 78 mΩ TO-247 Through Hole 3 -8 V, +18 V Enhancement 2.1V 1.8V 125 W Single 1
RS Stock No. 125-3453
Mfr. Part No.C3M0065100K
BrandWolfspeed
£11.77
Each
Units
N 35 A 1000 V 90 mΩ TO-247 Through Hole 4 -8 V, +19 V Enhancement 3.5V 1.8V 113.5 W - 1
RS Stock No. 168-4886
Mfr. Part No.C3M0065100K
BrandWolfspeed
£9.273
Each (In a Tube of 30)
Units
N 35 A 1000 V 90 mΩ TO-247 Through Hole 4 -8 V, +19 V Enhancement 3.5V 1.8V 113.5 W - 1
RS Stock No. 162-9713
Mfr. Part No.C3M0065090J
BrandWolfspeed
£8.105
Each (In a Tube of 50)
Units
N 35 A 900 V 78 mΩ D2PAK (TO-263) Surface Mount 7 +25 V Enhancement 2.1V 1.8V 113 W Single 1
RS Stock No. 915-8830
Mfr. Part No.C3M0065090J
BrandWolfspeed
£8.92
Each
Units
N 35 A 900 V 78 mΩ D2PAK (TO-263) Surface Mount 7 +25 V Enhancement 2.1V 1.8V 113 W Single 1