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. 163-2020
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.2SK3557-6-TB-E
THB4.17
Each (On a Reel of 3000)
Units
N 10 → 20mA 15 V - -15V Single Single - Surface Mount CP 3 10pF 2.9pF 2.9 x 1.5 x 1.1mm
RS Stock No. 663-9033
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.2SK1332-3-TL-E
Brand :Sanyo
THB11.00
Each: (In a Pack of 5)
Units
N - 30 V - -30V Single - - Surface Mount MCP 3 0.9pF 5pF 2 x 1.25 x 0.9mm
RS Stock No. 166-3094
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MMBFJ176
THB4.17
Each (On a Reel of 3000)
Units
P -2 → -25mA 15 V +30 V -30V Single Single 250 Ω Surface Mount SOT-23 3 - - 2.92 x 1.3 x 0.93mm
RS Stock No. 163-0037
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MMBFJ175LT1G
THB3.85
Each (On a Reel of 3000)
Units
P -7 → -60mA 15 V - -25V Single Single 125 Ω Surface Mount SOT-23 3 11 pF @ 0 V 11 pF @ -10 V 3.04 x 1.4 x 1.01mm
RS Stock No. 166-0535
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BF510,215
Brand :NXP
THB9.48
Each (On a Reel of 3000)
Units
N 0.7 → 3.0mA 20 V - 20V Single Single - Surface Mount SOT-23 (TO-236AB) 3 - - 3 x 1.4 x 1mm
RS Stock No. 166-3080
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MMBF4092
THB4.282
Each (On a Reel of 3000)
Units
N min. 15mA 0.2 V -40 V 40V Single Single 50 Ω Surface Mount SOT-23 3 - - 2.92 x 1.3 x 0.93mm
RS Stock No. 145-5553
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MMBFJ112
THB2.832
Each (On a Reel of 3000)
Units
N min. 5mA - -35 V 35V Single Single 50 Ω Surface Mount SOT-23 3 28pF 28pF 2.92 x 1.3 x 0.93mm
RS Stock No. 626-2327
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BF545A,215
Brand :NXP
THB16.967
Each: (In a Pack of 10)
Units
N 2.0 → 6.5mA 30 V -30 V -30V Single Single - Surface Mount SOT-23 (TO-236AB) 3 - - 3 x 1.4 x 1mm
RS Stock No. 864-7840
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MMBFJ175LT1G
THB9.785
Each: (In a Pack of 25)
Units
P -7 → -60mA 15 V - -25V Single Single 125 Ω Surface Mount SOT-23 3 11 pF @ 0 V 11 pF @ -10 V 3.04 x 1.4 x 1.01mm
RS Stock No. 761-3684
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MMBFJ112
THB8.588
Each: (In a Pack of 25)
Units
N min. 5mA - -35 V 35V Single Single 50 Ω Surface Mount SOT-23 3 28pF 28pF 2.92 x 1.3 x 0.93mm
RS Stock No. 806-4251
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MMBF4093
THB7.562
Each: (In a Pack of 50)
Units
N min. 8mA 0.2 V -40 V 40V Single Single 80 Ω Surface Mount SOT-23 3 - - 2.92 x 1.3 x 0.93mm
RS Stock No. 806-4314
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MMBFJ176
THB11.652
Each (On a Tape of 50)
Units
P -2 → -25mA 15 V +30 V -30V Single Single 250 Ω Surface Mount SOT-23 3 - - 2.92 x 1.3 x 0.93mm
RS Stock No. 626-3314
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.PMBFJ309,215
Brand :NXP
THB9.639
Each: (In a Pack of 10)
Units
N 12 → 30mA 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. 867-3287
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TF412ST5G
THB10.251
Each: (In a Pack of 50)
Units
N 1.2 → 3mA 30 V - -30V Single Single - Surface Mount SOT-883 3 4pF 4pF 1.08 x 0.68 x 0.41mm
RS Stock No. 760-6034
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MMBF5459
THB9.57
Each: (In a Pack of 50)
Units
N 4 → 16mA - -25 V 25V Single Single - Surface Mount SOT-23 3 3pF 7pF 2.92 x 1.3 x 0.93mm
RS Stock No. 920-9928
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TF414T5G
THB8.68
Each: (In a Pack of 50)
Units
N 0.05 → 0.13mA 40 V - -40V Single Single - Surface Mount SOT-883 3 0.7pF 0.3pF 1.07 x 0.67 x 0.41mm
RS Stock No. 792-5164
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.2SK3557-6-TB-E
THB10.133
Each: (In a Pack of 25)
Units
N 10 → 20mA 15 V - -15V Single Single - Surface Mount CP 3 10pF 2.9pF 2.9 x 1.5 x 1.1mm
RS Stock No. 806-1750
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.J109
THB9.31
Each: (In a Pack of 25)
Units
N min. 40mA - -25 V 25V Single Single 12 Ω Through Hole TO-92 3 85pF 85pF 4.58 x 3.86 x 4.58mm
RS Stock No. 162-9314
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CPH6904-TL-E
THB7.857
Each (On a Reel of 3000)
Units
N 20 → 40mA 25 V - -25V Dual Common Source - Surface Mount CPH 6 6pF 2.3pF 2.9 x 1.6 x 0.9mm
RS Stock No. 166-2223
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MMBFJ110
THB3.705
Each (On a Reel of 3000)
Units
N Min. 10mA 15 V -25 V 25V Single Single 18 Ω Surface Mount SOT-23 3 85pF 85pF 2.92 x 1.4 x 0.94mm
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