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. 708-2469
Mfr. Part No.ZXMP4A16GTA
$1.177
Each (In a Pack of 10)
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P 6.4 A 40 V 100 mΩ SOT-223 Surface Mount 3 + Tab -20 V, +20 V Enhancement - 1V 3.9 W Single 1
RS Stock No. 922-8011
Mfr. Part No.ZXMP4A16GTA
$0.605
Each (On a Reel of 1000)
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P 6.4 A 40 V 100 mΩ SOT-223 Surface Mount 3 + Tab -20 V, +20 V Enhancement - 1V 3.9 W Single 1
RS Stock No. 122-3314
Mfr. Part No.DMP3085LSD-13
$0.156
Each (On a Reel of 2500)
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P 3.1 A 30 V 95 mΩ SOIC Surface Mount 8 -20 V, +20 V Enhancement 3V - 1.7 W Isolated 2
RS Stock No. 827-0490
Mfr. Part No.DMP3085LSD-13
$0.463
Each (In a Pack of 50)
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P 3.1 A 30 V 95 mΩ SOIC Surface Mount 8 -20 V, +20 V Enhancement 3V - 1.7 W Isolated 2
RS Stock No. 169-7461
Mfr. Part No.DMC3025LSD-13
$0.244
Each (On a Reel of 2500)
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N, P 2.3 A, 8.5 A 30 V 32 mΩ, 85 mΩ SOIC Surface Mount 8 -20 V, +20 V Enhancement 2V - 1.5 W Isolated 2
RS Stock No. 823-3198
Mfr. Part No.DMC3025LSD-13
$0.631
Each (In a Pack of 25)
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N, P 2.3 A, 8.5 A 30 V 32 mΩ, 85 mΩ SOIC Surface Mount 8 -20 V, +20 V Enhancement 2V - 1.5 W Isolated 2
RS Stock No. 122-0219
Mfr. Part No.DMN3150L-7
$0.152
Each (On a Reel of 3000)
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N 3.8 A 30 V 112 mΩ SOT-23 Surface Mount 3 -12 V, +12 V Enhancement 1.4V - 1.4 W Single 1
RS Stock No. 751-4161
Mfr. Part No.DMN3024LK3-13
$0.756
Each (On a Tape of 25)
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N 14.4 A 30 V 39 mΩ DPAK (TO-252) Surface Mount 3 -20 V, +20 V Enhancement 3V - 8.9 W Single 1
RS Stock No. 751-4177
Mfr. Part No.DMN3150L-7
$0.502
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N 3.8 A 30 V 112 mΩ SOT-23 Surface Mount 3 -12 V, +12 V Enhancement 1.4V - 1.4 W Single 1
RS Stock No. 122-0217
Mfr. Part No.DMN3024LK3-13
$0.293
Each (On a Reel of 2500)
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N 14.4 A 30 V 39 mΩ DPAK (TO-252) Surface Mount 3 -20 V, +20 V Enhancement 3V - 8.9 W Single 1
RS Stock No. 122-2416
Mfr. Part No.ZVN4206AV
$0.512
Each (In a Bag of 4000)
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N 600 mA 60 V 1.5 Ω TO-92 Through Hole 3 -20 V, +20 V Enhancement 3V - 700 mW Single 1
RS Stock No. 823-4059
Mfr. Part No.ZXMC4559DN8TA
$2.101
Each (In a Pack of 20)
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N, P 2.6 A, 4.7 A 60 V 75 mΩ, 125 mΩ SOIC Surface Mount 8 -20 V, +20 V Enhancement - 1V 2.1 W Isolated 2
RS Stock No. 122-3286
Mfr. Part No.ZXMC4559DN8TA
$1.474
Each (On a Reel of 500)
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N, P 2.6 A, 4.7 A 60 V 75 mΩ, 125 mΩ SOIC Surface Mount 8 -20 V, +20 V Enhancement - 1V 2.1 W Isolated 2
RS Stock No. 738-4932
Mfr. Part No.BSS84-7-F
$0.114
Each (In a Pack of 100)
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P 130 mA 50 V 10 Ω SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 2V - 300 mW Single 1
RS Stock No. 922-8131
Mfr. Part No.BSS84-7-F
$0.057
Each (On a Reel of 3000)
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P 130 mA 50 V 10 Ω SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 2V - 300 mW Single 1
RS Stock No. 823-1823
Mfr. Part No.ZVN4206AV
$1.024
Each (In a Pack of 10)
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N 600 mA 60 V 1.5 Ω TO-92 Through Hole 3 -20 V, +20 V Enhancement 3V - 700 mW Single 1
RS Stock No. 708-2396
Mfr. Part No.2N7002-7-F
$0.047
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N 115 mA 60 V 13.5 Ω SOT-23 Surface Mount 3 -20 V, +20 V Enhancement 2.5V - 300 mW Single 1
RS Stock No. 790-4609
Mfr. Part No.DMN6040SK3-13
$0.874
Each (In a Pack of 10)
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N 20 A 60 V 50 mΩ DPAK (TO-252) Surface Mount 3 -20 V, +20 V Enhancement 3V - 42 W Single 1
RS Stock No. 122-1510
Mfr. Part No.DMN6040SK3-13
$0.34
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N 20 A 60 V 50 mΩ DPAK (TO-252) Surface Mount 3 -20 V, +20 V Enhancement 3V - 42 W Single 1
RS Stock No. 122-0611
Mfr. Part No.ZXMN4A06GTA
$0.915
Each (On a Reel of 1000)
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N 7 A 40 V 75 mΩ SOT-223 Surface Mount 3 + Tab -20 V, +20 V Enhancement - 1V 3.9 W Single 1