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 Maximum Gate Threshold Voltage Minimum Gate Threshold Voltage Maximum Gate Source Voltage Package Type Mounting Type Pin Count Transistor Configuration Channel Mode Maximum Power Dissipation Automotive Standard
RS庫存編號 772-5172
製造零件編號2SJ209-T1B-A
HK$1.821
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P 200 mA 100 V 100 Ω 2.5V - -16 V, +16 V SC-59 Surface Mount 3 Single Enhancement 200 mW -
RS庫存編號 772-5264
製造零件編號2SJ606-AZ
HK$29.235
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P 300 A 60 V 23 mΩ 2.5V - -20 V, +20 V TO-220 Surface Mount 3 Single Enhancement 120 W -
RS庫存編號 772-5428
製造零件編號2SK3433-AZ
HK$9.626
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N 80 A 60 V 41 mΩ 2.5V - -20 V, +20 V TO-220 Surface Mount 3 Single Enhancement 47 W -
RS庫存編號 772-5447
製造零件編號2SK3715-AZ
HK$29.595
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N 75 A 60 V 9.5 mΩ 2.5V - -20 V, +20 V TO-220F Through Hole 3 Single Enhancement 40 W -
RS庫存編號 772-5399
製造零件編號2SK3162-E
HK$27.715
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N 80 A 200 V 85 mΩ 2.5V - -20 V, +20 V SC-67 Through Hole 3 Single Enhancement 35 W -
RS庫存編號 772-6633
製造零件編號UPA677TB-T1-A
HK$2.564
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N 350 mA 20 V 20 Ω 1.5V - - SOT-363 (SC-88) Surface Mount 6 Isolated Enhancement - -
RS庫存編號 772-5276
製造零件編號2SJ626-T1B-A
HK$2.32
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P 6 A 60 V 550 mΩ 2.5V - -20 V, +20 V SOT-346T (SC-96) Surface Mount 3 Single Enhancement 1.25 W -
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 4V - -20 V, +20 V SC-65 Through Hole 3 Single Enhancement 100 W -
RS庫存編號 548-5355
製造零件編號2SK3435-AZ
HK$16.89
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N 80 A 60 V 14 mΩ 2.5V - -20 V, +20 V - Through Hole 3 Single Enhancement 1.5 W -
RS庫存編號 772-5251
製造零件編號2SJ598-AZ
HK$5.301
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P 30 A 60 V 190 mΩ 2.5V - -20 V, +20 V IPAK (TO-251) Through Hole 4 Single Enhancement 23 W -
RS庫存編號 772-5258
製造零件編號2SJ601-AZ
HK$11.372
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P 120 A 60 V 46 mΩ 2.5V - -20 V, +20 V IPAK (TO-251) Through Hole 4 Single Enhancement 65 W -
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 2.5V - -20 V, +20 V IPAK (TO-251) Through Hole 4 Single Enhancement 36 W -
RS庫存編號 772-5403
製造零件編號2SK3307-A
HK$20.605
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N 280 A 60 V 14 mΩ 2.5V - -20 V, +20 V TO-3P Through Hole 3 Single Enhancement 120 W -
RS庫存編號 772-5425
製造零件編號2SK3408-T1B-A
HK$2.858
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N 4 A 43 V 260 mΩ 2.5V - -20 V, +20 V SOT-346T (SC-96) Surface Mount 3 Single Enhancement 1.25 W -
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 2.5V - -20 V, +20 V TO-220 Surface Mount 3 Single Enhancement 40 W -
RS庫存編號 772-5440
製造零件編號2SK3793-AZ
HK$9.416
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N 22 A 100 V 148 mΩ 2.5V - -20 V, +20 V TO-220F Through Hole 3 Single Enhancement 20 W -
RS庫存編號 124-3649
製造零件編號2SK1339-E
HK$26.695
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N 3 A 900 V 7 Ω - - -30 V, +30 V TO-3P Through Hole 3 + Tab Single Enhancement 80 W -
RS庫存編號 772-6642
製造零件編號UPA679TB-T1-A
HK$1.607
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N, P 1.4 A 20 V 880 mΩ 1.5V - -12 V, +12 V SOT-363 (SC-88) Surface Mount 6 Isolated Enhancement 200 mW -
RS庫存編號 772-5179
製造零件編號2SJ248-E
HK$15.13
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P 32 A 100 V 450 mΩ 2V - -20 V, +20 V TO-220FM Through Hole 3 Single Enhancement 25 W -