JFETs

JFETs
A JFET is a four terminal device, the terminals are called gate, drain, source and body. The body terminal is always connected to the source. There are two types of JFETs an N-Channel & P-Channel.
What does JFET stand for?
JFET stands for junction field-effect transistor
N-Channel JFET Construction
The name N-Channel signifies that the electrons are the majority charge carriers. To form the N-Channel an N type semiconductor is used as a base and doped with a P type semiconductor at both ends. Both these P regions are electrically linked together with an ohmic contact at the gate. Two further terminals are taken out at the opposite ends for the drain and the source.
P-Channel JFET Construction
The name P channel signifies that the holes are the majority charge carriers. To form the P-Channel a P type semiconductor is used as a base and doped with an N type semiconductor at both ends. Both these N regions are electrically linked together with an ohmic contact at the gate. Two further terminals are taken out at the opposite ends for the drain and the source.
Features and Benefits
• High input impedance
• Voltage controlled device
• High degree of isolation between the input and the output
• Less noise
What are they also known as?
JUGFET
What are JFET transistors used for?
JFET transistors have many applications in electronics and communication. You can use them as an electronically controlled switch to control electric power to a load, and as amplifiers.
What is the difference between a JFET & BJT (Bipolar Junction Transistor)?
The main difference between a JFET and BJT is a field effect transistor only majority charge carrier flows while the BJT (bipolar transistor) offers both majority and minority charge carrier flows.
What is doping of semiconductors?
Doping is the process of including foreign impurities to intrinsic semiconductors to change their electrical properties. Trivalent atoms used to dope silicon cause an intrinsic semiconductor to become a P-Type semiconductor. Pentavalent used to dope silicon cause an intrinsic semiconductor to become an N-Type semiconductor.

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รายละเอียดสินค้า / Description ราคา / Price Channel Type Idss Drain-Source Cut-off Current Maximum Drain Source Voltage Maximum Gate Source Voltage Maximum Drain Gate Voltage Configuration Transistor Configuration Maximum Drain Source Resistance Mounting Type Package Type Pin Count Drain Gate On-Capacitance Source Gate On-Capacitance Dimensions
RS Stock No. 760-3126
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.2SK209-Y(TE85L,F)
Brand :Toshiba
THB11.92
Each: (In a Pack of 10)
Units
N 1.2 → 3.0mA 10 V -30 V -50V Single Single - Surface Mount SOT-346 (SC-59) 3 - - 2.9 x 1.5 x 1.1mm
RS Stock No. 806-1757
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.J112
THB9.76
Each: (In a Pack of 50)
Units
N Min. 5mA - -35 V 35V Single Single 50 Ω Through Hole TO-92 3 28pF 28pF 5.2 x 4.19 x 5.33mm
RS Stock No. 124-1385
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.J112
THB3.386
Each (In a Bag of 1000)
Units
N Min. 5mA - -35 V 35V Single Single 50 Ω Through Hole TO-92 3 28pF 28pF 5.2 x 4.19 x 5.33mm
RS Stock No. 103-8162
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.PMBFJ177,215
Brand :NXP
THB4.08
Each (On a Reel of 3000)
Units
P 1.5 → 20mA 30 V +30 V 30V Single Single 300 Ω Surface Mount SOT-23 (TO-236AB) 3 - - 3 x 1.4 x 1mm
RS Stock No. 163-2337
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MMBF4391LT1G
THB2.89
Each (On a Reel of 3000)
Units
N 50 → 150mA 30 V +30 V 30V Single Single 30 Ω Surface Mount SOT-23 3 - - 2.9 x 1.3 x 0.94mm
RS Stock No. 625-5723
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MMBF4391LT1G
THB13.75
Each: (In a Pack of 5)
Units
N 50 → 150mA 30 V +30 V 30V Single Single 30 Ω Surface Mount SOT-23 3 - - 2.9 x 1.3 x 0.94mm
RS Stock No. 112-5510
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.PMBFJ177,215
Brand :NXP
THB10.908
Each: (In a Pack of 5)
Units
P 1.5 → 20mA 30 V +30 V 30V Single Single 300 Ω Surface Mount SOT-23 3 - - 3 x 1.4 x 1mm
RS Stock No. 663-9045
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.2SK1740-5-TB-E
Brand :Sanyo
THB16.00
Each: (In a Pack of 5)
Units
N - 40 V - -40V Single - 30 Ω Surface Mount CP 3 2.5pF 11pF 2.9 x 1.5 x 1.1mm
RS Stock No. 166-0548
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.PMBFJ308,215
Brand :NXP
THB3.256
Each (On a Reel of 3000)
Units
N 12 → 60mA 25 V -25 V -25V Single Single 50 Ω Surface Mount SOT-23 (TO-236AB) 3 - - 3 x 1.4 x 1mm
RS Stock No. 625-5745
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MMBFJ310LT1G
THB14.09
Each: (In a Pack of 5)
Units
N 24 → 60mA 25 V +25 V - Single Single - Surface Mount SOT-23 3 - - 2.9 x 1.3 x 0.94mm
RS Stock No. 756-0350
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.2SK3320-BL(TE85L,F
Brand :Toshiba
THB23.206
Each: (In a Pack of 5)
Units
N 6 → 14mA 50 V -1.5 V -50V Dual Common Source - Surface Mount USV 5 13pF - 2 x 1.25 x 0.9mm
RS Stock No. 773-7813
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MMBFJ310LT3G
THB10.506
Each: (In a Pack of 10)
Units
N 24 → 60mA 25 V - - Single Single - Surface Mount SOT-23 3 - 5pF 3.04 x 1.4 x 1.01mm
RS Stock No. 166-2319
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BSR58
THB2.448
Each (On a Reel of 3000)
Units
N 8 → 80mA 0.4 V -40 V 40V Single Single - Surface Mount SOT-23 3 - - 2.9 x 1.3 x 0.97mm
RS Stock No. 170-3357
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MMBFJ310LT1G
THB3.85
Each (On a Reel of 3000)
Units
N 24 → 60mA 25 V +25 V - Single Single - Surface Mount SOT-23 3 - - 2.9 x 1.3 x 0.94mm
RS Stock No. 626-3308
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.PMBFJ308,215
Brand :NXP
THB4.41
Each: (In a Pack of 10)
Units
N 12 → 60mA 25 V -25 V -25V Single Single 50 Ω Surface Mount SOT-23 (TO-236AB) 3 - - 3 x 1.4 x 1mm
RS Stock No. 166-2910
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.J111
THB2.387
Each (In a Bag of 10000)
Units
N Min. 20mA - -35 V 35V Single Single 30 Ω Through Hole TO-92 3 28pF 28pF 5.2 x 4.19 x 5.33mm
RS Stock No. 122-0136
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MMBFJ310LT3G
THB3.448
Each (On a Reel of 10000)
Units
N 24 → 60mA 25 V - - Single Single - Surface Mount SOT-23 3 - 5pF 3.04 x 1.4 x 1.01mm
RS Stock No. 807-5201
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BSR58
THB4.087
Each: (In a Pack of 100)
Units
N 8 → 80mA 0.4 V -40 V 40V Single Single - Surface Mount SOT-23 3 - - 2.9 x 1.3 x 0.97mm
RS Stock No. 806-1753
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.J111
THB8.97
Each: (In a Pack of 50)
Units
N Min. 20mA - -35 V 35V Single Single 30 Ω Through Hole TO-92 3 28pF 28pF 5.2 x 4.19 x 5.33mm
RS Stock No. 800-9364
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.2SK3666-2-TB-E
THB3.611
Each: (In a Pack of 100)
Units
N 0.6 → 1.5mA 30 V - -30V Single Single 200 Ω Surface Mount SOT-23 3 - - 2.9 x 1.5 x 1.1mm
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