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庫存編號 772-5416
製造零件編號2SK3385-AZ
HK$7.697
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N 100 A 60 V 45 mΩ IPAK (TO-251) Through Hole 4 -20 V, +20 V Enhancement 2.5V - 36 W Single 1
RS庫存編號 772-5302
製造零件編號2SK1317-E
HK$66.80
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N 7 A 1500 V 12 Ω SC-65 Through Hole 3 -20 V, +20 V Enhancement 4V - 100 W Single 1
RS庫存編號 772-5399
製造零件編號2SK3162-E
HK$27.715
/個 (每包:2個)
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N 80 A 200 V 85 mΩ SC-67 Through Hole 3 -20 V, +20 V Enhancement 2.5V - 35 W Single 1
RS庫存編號 772-5440
製造零件編號2SK3793-AZ
HK$9.416
/個 (每包:5個)
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N 22 A 100 V 148 mΩ TO-220F Through Hole 3 -20 V, +20 V Enhancement 2.5V - 20 W Single 1
RS庫存編號 772-5425
製造零件編號2SK3408-T1B-A
HK$2.858
/個 (每包:20個)
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N 4 A 43 V 260 mΩ SOT-346T (SC-96) Surface Mount 3 -20 V, +20 V Enhancement 2.5V - 1.25 W Single 1
RS庫存編號 124-3649
製造零件編號2SK1339-E
HK$26.695
/個 (每包:2個)
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N 3 A 900 V 7 Ω TO-3P Through Hole 3 + Tab -30 V, +30 V Enhancement - - 80 W Single 1
RS庫存編號 772-5267
製造零件編號2SJ602-AZ
HK$10.024
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P 50 A 60 V 107 mΩ TO-220 Surface Mount 3 -20 V, +20 V Enhancement 2.5V - 40 W Single 1
RS庫存編號 772-5447
製造零件編號2SK3715-AZ
HK$29.595
/個 (每包:2個)
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N 75 A 60 V 9.5 mΩ TO-220F Through Hole 3 -20 V, +20 V Enhancement 2.5V - 40 W Single 1
RS庫存編號 772-6642
製造零件編號UPA679TB-T1-A
HK$1.607
個 (在毎卷:40)
單位
N, P 1.4 A 20 V 880 mΩ SOT-363 (SC-88) Surface Mount 6 -12 V, +12 V Enhancement 1.5V - 200 mW Isolated 2
RS庫存編號 548-5355
製造零件編號2SK3435-AZ
HK$16.89
單位
N 80 A 60 V 14 mΩ - Through Hole 3 -20 V, +20 V Enhancement 2.5V - 1.5 W Single 1
RS庫存編號 772-5179
製造零件編號2SJ248-E
HK$15.13
/個 (每包:4個)
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P 32 A 100 V 450 mΩ TO-220FM Through Hole 3 -20 V, +20 V Enhancement 2V - 25 W Single 1
RS庫存編號 772-5264
製造零件編號2SJ606-AZ
HK$29.235
/個 (每包:2個)
單位
P 300 A 60 V 23 mΩ TO-220 Surface Mount 3 -20 V, +20 V Enhancement 2.5V - 120 W Single 1
RS庫存編號 772-5258
製造零件編號2SJ601-AZ
HK$11.372
/個 (每包:5個)
單位
P 120 A 60 V 46 mΩ IPAK (TO-251) Through Hole 4 -20 V, +20 V Enhancement 2.5V - 65 W Single 1
RS庫存編號 772-5251
製造零件編號2SJ598-AZ
HK$5.301
/個 (每包:10個)
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P 30 A 60 V 190 mΩ IPAK (TO-251) Through Hole 4 -20 V, +20 V Enhancement 2.5V - 23 W Single 1
RS庫存編號 772-5403
製造零件編號2SK3307-A
HK$20.605
/個 (每包:2個)
單位
N 280 A 60 V 14 mΩ TO-3P Through Hole 3 -20 V, +20 V Enhancement 2.5V - 120 W Single 1
RS庫存編號 772-5428
製造零件編號2SK3433-AZ
HK$9.626
/個 (每包:5個)
單位
N 80 A 60 V 41 mΩ TO-220 Surface Mount 3 -20 V, +20 V Enhancement 2.5V - 47 W Single 1
RS庫存編號 772-6633
製造零件編號UPA677TB-T1-A
HK$2.564
個 (在毎卷:40)
單位
N 350 mA 20 V 20 Ω SOT-363 (SC-88) Surface Mount 6 - Enhancement 1.5V - - Isolated 2