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.

...
Read more Read less

Filters

Viewing 61 - 80 of 159 products
Results per page
Description 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. 749-8265
Mfr. Part No.DSK5J01P0L
BrandPanasonic
HK$2.318
Each (In a Pack of 20)
units
N 1 → 3mA - - -55V Single Single - Surface Mount SMini3 F2 B 3 - - 2 x 1.25 x 0.8mm
RS Stock No. 760-3123
Mfr. Part No.2SK208-R(TE85L,F)
BrandToshiba
HK$2.635
Each (In a Pack of 10)
units
N 0.3 → 0.75mA 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. 166-2910
Mfr. Part No.J111
HK$0.681
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. 792-5167
Mfr. Part No.2SK3557-7-TB-E
HK$2.573
Each (In a Pack of 20)
units
N 16 → 32mA 15 V - -15V Single Single - Surface Mount CP 3 10pF 2.9pF 2.9 x 1.5 x 1.1mm
RS Stock No. 806-4295
Mfr. Part No.MMBF5462
HK$1.595
Each (On a Tape of 50)
units
P -4 → -16mA 15 V +40 V -40V Single Single - Surface Mount SOT-23 3 - - 2.92 x 1.3 x 0.93mm
RS Stock No. 166-3085
Mfr. Part No.MMBF5103
HK$0.672
Each (On a Reel of 3000)
units
N 10 → 40mA 20 V -40 V 40V Single Single - Surface Mount SOT-23 3 - - 2.9 x 1.3 x 1.04mm
RS Stock No. 626-3241
Mfr. Part No.PMBFJ110,215
BrandNXP
HK$3.44
Each (In a Pack of 5)
units
N Min. 10mA 25 V -25 V -25V Single Single 18 Ω Surface Mount SOT-23 (TO-236AB) 3 - - 3 x 1.4 x 1mm
RS Stock No. 749-8277
Mfr. Part No.DSK9J01Q0L
BrandPanasonic
HK$2.778
Each (In a Pack of 20)
units
N 2 → 6.5mA - - -55V Single Single - Surface Mount SSMini3 F3 B 3 - - 1.6 x 0.85 x 0.7mm
RS Stock No. 761-3672
Mfr. Part No.MMBF4117
HK$1.742
Each (In a Pack of 50)
units
N 0.03 → 0.09mA - -40 V 40V Single Single - Surface Mount SOT-23 3 - - 2.92 x 1.3 x 0.93mm
RS Stock No. 773-7816
Mfr. Part No.MMBFJ177LT1G
HK$2.911
Each (In a Pack of 10)
units
P 1.5 → 20mA - - 25V dc Single Single 300 Ω Surface Mount SOT-23 3 - 11pF 3.04 x 1.4 x 1.01mm
RS Stock No. 103-7584
Mfr. Part No.BF545A,215
BrandNXP
HK$2.494
Each (On a Reel of 3000)
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. 760-6030
Mfr. Part No.MMBF5457
HK$1.708
Each (In a Pack of 50)
units
N 1 → 5mA - -25 V 25V Single Single - Surface Mount SOT-23 3 3pF 7pF 2.92 x 1.3 x 0.93mm
RS Stock No. 146-2128
Mfr. Part No.MMBF4416
HK$0.495
Each (On a Reel of 3000)
units
N 5 → 15mA 15 V -30 V 30V Single Single - Surface Mount SOT-23 3 - - 2.9 x 1.3 x 1.04mm
RS Stock No. 145-5553
Mfr. Part No.MMBFJ112
HK$0.689
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. 166-2993
Mfr. Part No.MMBF5485
HK$0.538
Each (On a Reel of 3000)
units
N 4 → 10mA - - - Single Single - Surface Mount SOT-23 3 - - 2.92 x 1.3 x 0.93mm
RS Stock No. 663-9077
Mfr. Part No.CPH5905H-TL-E
BrandSanyo
HK$3.13
Each (In a Pack of 5)
units
N - 15 V - -15V Dual Emitter Drain - - Surface Mount CPH 5 2.9pF 10pF 2.9 x 1.6 x 0.9mm
RS Stock No. 166-1831
Mfr. Part No.MMBFJ113
HK$0.772
Each (On a Reel of 3000)
units
N Min. 2mA - -35 V 35V Single Single 100 Ω Surface Mount SOT-23 3 28pF 28pF 2.92 x 1.3 x 0.93mm
RS Stock No. 761-4524
Mfr. Part No.MMBFJ113
HK$1.949
Each (In a Pack of 25)
units
N Min. 2mA - -35 V 35V Single Single 100 Ω Surface Mount SOT-23 3 28pF 28pF 2.92 x 1.3 x 0.93mm
RS Stock No. 112-4185
Mfr. Part No.PMBF4393,215
BrandNXP
HK$3.10
Each
units
N 50 → 150mA 40 V -40 V 40V Single Single 100 Ω Surface Mount SOT-23 3 - - 3 x 1.4 x 1mm
RS Stock No. 806-4324
Mfr. Part No.MMBFJ310
HK$2.022
Each (In a Pack of 50)
units
N 24 → 60mA 10 V -25 V - Single Single - Surface Mount SOT-23 3 2.5pF 5pF 2.92 x 1.3 x 0.93mm
Related Products
Siemens SIRIUS ACT series extremely rugged IP69K key-operated ...
Description:
Siemens SIRIUS ACT series extremely rugged IP69K key-operated switch complete units. On these new compact units, the electrical module is permanently installed and is only secured by the holder. Easy installationSuitable for use in extreme environmentsNo special tools requiredSimple geometry ...
The Siemens SIRIUS ACT series is a type ...
Description:
The Siemens SIRIUS ACT series is a type operated switch of 22mm round diameter comes with 2 key. This key switch has 2 latching switch positions O-I. It had an SPDT contact configuration. It has a black coloured plastic front ...
RONIS key-operated switch, 22 mm, round, metal, shiny, ...
Description:
RONIS key-operated switch, 22 mm, round, metal, shiny, lock number SB30, with 2 keys, 2 switch positions O-I, latching, actuating angle 90°, 10:30h/13:30h, key removal O+I, with holder, 1 NO+1 NC, screw terminal, possible special locks: 3SB31, 421, 455.
A comprehensive range of components for the user ...
Description:
A comprehensive range of components for the user who wants a reliable and cost-effective solution to meet their needs. IP66 rated for harsh environmentsTemperature range - 25 to + 70°C22.5mm hole mounting.