JFETs

A JFET is a four-terminal device, the terminals are called the gate, drain, source and body. The body terminal is always connected to the source. There are two types of JFETs and N-Channel P-Channel. FET stands for junction field-effect transistor. They can also be referred to as a JUGFET

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
  • A high degree of isolation between the input and the output
  • Less noise

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 and 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 carriers flow.

What is the 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.


...
Lees meer Lees minder

Filters

1 - 20 van 84 producten worden weergegeven
Resultaten per pagina
Omschrijving Prijs 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-stocknr. 166-1840
FabrikantnummerMMBFJ201
FabrikantON Semiconductor
€ 0,078
Each (On a Reel of 3000)
Aantal stuks
N 0.3 to 1.5mA - -40 V 40V Single Single - Surface Mount SOT-23 3 - - 2.92 x 1.3 x 0.93mm
RS-stocknr. 761-3688
FabrikantnummerMMBFJ201
FabrikantON Semiconductor
€ 0,223
Each (In a Pack of 25)
Aantal stuks
N 0.3 to 1.5mA - -40 V 40V Single Single - Surface Mount SOT-23 3 - - 2.92 x 1.3 x 0.93mm
RS-stocknr. 864-7840
FabrikantnummerMMBFJ175LT1G
FabrikantON Semiconductor
€ 0,285
Each (In a Pack of 25)
Aantal stuks
P -7 to -60mA 15 V - -25V Single Single 125 Ω Surface Mount SOT-23 3 11pF 11pF 3.04 x 1.4 x 1.01mm
RS-stocknr. 163-0037
FabrikantnummerMMBFJ175LT1G
FabrikantON Semiconductor
€ 0,105
Each (On a Reel of 3000)
Aantal stuks
P -7 to -60mA 15 V - -25V Single Single 125 Ω Surface Mount SOT-23 3 11pF 11pF 3.04 x 1.4 x 1.01mm
RS-stocknr. 806-1753
FabrikantnummerJ111
FabrikantON Semiconductor
€ 0,23
Each (In a Pack of 50)
Aantal stuks
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-stocknr. 166-2910
FabrikantnummerJ111
FabrikantON Semiconductor
€ 0,071
Each (In a Bag of 10000)
Aantal stuks
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-stocknr. 791-9403
FabrikantnummerCPH6904-TL-E
FabrikantON Semiconductor
€ 0,472
Each (In a Pack of 10)
Aantal stuks
N 20 to 40mA 25 V - -25V Dual Common Source - Surface Mount CPH 6 6pF 2.3pF 2.9 x 1.6 x 0.9mm
RS-stocknr. 773-7819
FabrikantnummerMMBFJ309LT1G
FabrikantON Semiconductor
€ 0,316
Each (In a Pack of 10)
Aantal stuks
N 12 to 30mA 25 V - - Single Single - Surface Mount SOT-23 3 - 5pF 3.04 x 1.4 x 1.01mm
RS-stocknr. 163-0964
FabrikantnummerMMBFJ309LT1G
FabrikantON Semiconductor
€ 0,113
Each (On a Reel of 3000)
Aantal stuks
N 12 to 30mA 25 V - - Single Single - Surface Mount SOT-23 3 - 5pF 3.04 x 1.4 x 1.01mm
RS-stocknr. 162-9314
FabrikantnummerCPH6904-TL-E
FabrikantON Semiconductor
€ 0,228
Each (On a Reel of 3000)
Aantal stuks
N 20 to 40mA 25 V - -25V Dual Common Source - Surface Mount CPH 6 6pF 2.3pF 2.9 x 1.6 x 0.9mm
RS-stocknr. 760-3123
Fabrikantnummer2SK208-R(TE85L,F)
FabrikantToshiba
€ 0,323
Each (In a Pack of 10)
Aantal stuks
N 0.3 to 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-stocknr. 124-1385
FabrikantnummerJ112
FabrikantON Semiconductor
€ 0,094
Each (In a Bag of 1000)
Aantal stuks
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-stocknr. 738-7607
Fabrikantnummer2N4392CSM
FabrikantSemelab
€ 65,91
Each
Aantal stuks
N 25 to 75mA 40 V +40 V 40V Single Single 60 Ω Surface Mount SOT-23 3 - - 3.05 x 2.54 x 1.02mm
RS-stocknr. 625-5723
FabrikantnummerMMBF4391LT1G
FabrikantON Semiconductor
€ 0,382
Each (In a Pack of 5)
Aantal stuks
N 50 to 150mA 30 V +30 V 30V Single Single 30 Ω Surface Mount SOT-23 3 - - 2.9 x 1.3 x 0.94mm
RS-stocknr. 760-3126
Fabrikantnummer2SK209-Y(TE85L,F)
FabrikantToshiba
€ 0,329
Each (In a Pack of 10)
Aantal stuks
N 1.2 to 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-stocknr. 145-5347
FabrikantnummerJ113
FabrikantON Semiconductor
€ 0,087
Each (In a Bag of 1000)
Aantal stuks
N Min. 2mA - -35 V 35V Single Single 100 Ω Through Hole TO-92 3 28pF 28pF 5.2 x 4.19 x 5.33mm
RS-stocknr. 806-1766
FabrikantnummerJ113
FabrikantON Semiconductor
€ 0,239
Each (In a Pack of 50)
Aantal stuks
N Min. 2mA - -35 V 35V Single Single 100 Ω Through Hole TO-92 3 28pF 28pF 5.2 x 4.19 x 5.33mm
RS-stocknr. 163-2337
FabrikantnummerMMBF4391LT1G
FabrikantON Semiconductor
€ 0,079
Each (On a Reel of 3000)
Aantal stuks
N 50 to 150mA 30 V +30 V 30V Single Single 30 Ω Surface Mount SOT-23 3 - - 2.9 x 1.3 x 0.94mm
RS-stocknr. 166-0535
FabrikantnummerBF510,215
FabrikantNXP
€ 0,146
Each (On a Reel of 3000)
Aantal stuks
N 0.7 to 3.0mA 20 V - 20V Single Single - Surface Mount SOT-23 (TO-236AB) 3 - - 3 x 1.4 x 1mm
RS-stocknr. 806-1757
FabrikantnummerJ112
FabrikantON Semiconductor
€ 0,257
Each (In a Pack of 50)
Aantal stuks
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