A choke is a wound component that tends to block the current variations that cross it. It is characterized by its inductance or reactance value.
Chokes are used in electronics and in electrical installations to filter signals. As coils, they block high frequencies. Common-mode chokes eliminate overvoltage by opposing current surges that tend to go to ground.
In the realm of high-power devices, chokes protect the capacitors designed to increase motor power factor and act as EMI filters. Anti-harmonic chokes help to eliminate harmonics interference in the network.
Quick-discharge chokes accelerate the discharge of low-voltage capacitors. Shunt inductance chokes compensate grid line capacitive currents.
Chokes consist of a coil around an empty core or on a ferrite core. Their inductance depends upon the number of turns and on the nature of the core. Common mode chokes are structurally close to transformers. They have two coils on a single magnetic field or core. Choke series resistance generates electrical losses and heat. Dry power or oil chokes require aeration or an active cooling system.
Chokes are characterized by inductance value, maximum current load and overvoltage, and series resistance.
 |
 |
Common-mode choke for electronics 10 A | DKFP SCHURTER
Description Current compensated chokeTHT-terminalsMultiple PCB-mounting optionsHigh...
 |
 |
Common-mode choke for electronics 0.31 – 900 µH | LPD/MSD Series Coilcraft
* Common- and differential-mode filtering in a single device * Five sizes for a wide variety of applications...
 |
 |
Common-mode choke for electronics 4.7 µH, 0.4 A | 50475C Murata Power Solutions
The 5000 series is a range of surface-mount common mode...
 |
  |
Current compensated choke 0.2 - 3 mH SCHAFFNER EMC
Cost-effective PCB designs for up to 80 A with forced cooling * Compact size...
 |
 |
Choke coil 50 - 60 Hz | DS30270, DS30080 FranceCol
Industrial quality inductance, for any power electronics use, in correlation with product characteristics. This product is available...
 |
 |
Line reactor ELR™ ELECTRONICON Kondensatoren GmbH
ELR™ line reactors ‘cos good reactors are as important: ELRTM Line Reactors Any device is only as reliable as the sum of its components. With more than fifteen years of experience in manufacturing tuned and detuned filter reactors for power factor correction,...
 |
 |
Motor choke 50 - 200 Hz | COMBILINE KEB
KEB COMBILINE Mains Input and Motor Chokes The B6 rectifier input circuit in the input of variable speed drives causes current ripples that strain the DC-bus capacitors in the...
 |
 |
Common-mode choke for electronics ITACOIL trasformatori
Linear common mode chokes Linear common mode chokes manufactured in a variety of shapes and sizes. "U" core shape is suggested where the low cost is the most important target, ET/UT shapes...
 |
 |
Common-mode choke for electronics Shaanxi Shinhom Enterprise Co.,Ltd
SMD toroidal common mode choke coil Low DCR common mode choke coil Common mode choke coil Large current and low profile choke coils High-reliability High frequency and low loss common-mode choke coils High-energy...
 |
 |
Current compensated choke 10000 - 100000 µH | B82732F Epcos
Rated voltage 250 V AC Rated current 0.45 ... 1.6 A Rated inductance 10 ... 100 mH Construction ■ Current-compensated frame core double choke ■ Closed magnetic circuit with frame construction made...
 |
 |
Common-mode choke for electronics 0.5 %u2013 10 mH Tianjin Huigao Magnetics Co.,Ltd
Common Mode Choke (UF9.8 Series) Rated Voltage: AC/DC 250V Withstand Voltage:...
 |
 |
Liquid cooled line reactor 1 400 A, 90 µH Muuntosähkö Oy - Trafox
Cooling liquid Ethylene glycol / water mixture 0/10040/60%. 30/70% recommended Inhibitor enriched coolants for corrosionpreventation. Temperature of the cooling liquid (in) Range -40+55 °C Nominal...
 |
 |
Common-mode choke for electronics Comelit s.p.a
Common Mode Choke Our production of common mode chokes has its origin in the needs of our own...
 |
 |
Common-mode power choke coil 10 - 280 A, 500 V | FIN900 FINMOTOR
Common mode impedance Rated currents...
 |
 |
Filter coil for electronics 1 - 25 A | CA, CH, CV Series RCD Components Inc
Low cost 1 to 25 Amp rod-core...
 |
 |
Common-mode choke for electronics 1.8 to 25 mH, Würth Elektronik eiSos GmbH 6 Co. KG
Approximate 1% stray inductance for symmetrical interference suppression Operating...
 |
 |
Filter coil for electronics LCR Electronics
As a world leader in the EMI/RFI component business, LCR offers unrivaled expertise with suppression components including capacitors, coils and chokes. LCR has a business...
 |
 |
Common-mode choke for electronics Taiyo Yuden
◦ Immunity against undesirable external line radiation fields and broadcast waves generated by multifunction telephone sets, PBXs, and facsimile machines. ◦...
 |
 |
Common-mode choke for electronics 67 - 1 000 Ω | HCMC series Delta Electronics, Inc.
Chip Inductors Delta's chip inductors are fully applicable to automated assembly. These chip inductors provide maximum protection features...
 |
 |
Iron-core choke for electronics HAHN - Elektrobau GmbH
Chokes with Iron-core In recent years, the number of electronic consumers supplied with direct current, has geatly increased. As a result of the retification of alernating-current voltages with subsequent smoothing, the supply grids are considerably loades with harmonic oscillation. The power supply companies are attempting to reduce harmonic oscillations in...
 |
 |
Liquid cooled line reactor Trafotek Oy
Trafotek is a pioneer in bringing out innovative cooling systems which help to achive the desired product size, weight and thermal impact on the environment. In fact, Trafotek...
 |
 |
Filter coil 5 - 100 kVAr, 400 V, IP00 | RTFX series POLYLUX
RTFX - Three phase filtering inductors for capacitor banks For protection of capacitors against harmonics. Line voltage 400 V at 50 Hz. Technical characteristics - Isolation Class F - 155ºC - Winding Class HC - 200ºC - Harmonic currents I3 = 8 %, I5 = 31 %, I7 = 13...
 |
 |
Most of the inductive components produced at our Company are based on our own produced ferrite cores.This gives us the capability to be flexible and competitive. Inductive components are produced by precise winding machines and other controlled devices...
 |
 |
Single-phase choke coil SILVERATECH
Our main production activity is job-order manufacturing and qualified fulfilment of our customers’ demands and satisfaction is our main priority. We manufacture Transformers and Chokes, including single and three phase with either toroidal cores, EI, UI or...
 |
 |
Three-phase choke coil FWI-CKI3 V&T Technologies Co., Ltd.
FWI-CKI3 Three phase 380v Input/output AC reactor (choke) Description Functions of AC reactor (choke): 1.Reduction of harmonics , Improvement of the power factor 2.Over-voltage...
 |
 |
Noise suppression choke coil 250 V | CHI 121 A/C/D REO INDUCTIVE COMPONENTS AG / REO ELEKTRONIK AG
Suppression of thyristor-controlled equipment and machines, electrical machine controls and electronic switching devices, suppression...
 |
 |
Features and Applications - AC three-phase filters used in all grid-tied inverter systems to protect environment from electromagnetic pollution - Prevention...
 |
 |
DIN rail mounted line reactor 3.4 - 37 A | SLR series SolaHD
DIN Rail Mounted Line Reactors. 2-20 HP, 3.4-37 Amps. The SLR Series is a CE style, DIN rail mounted line reactor that provides safe, compact protection...
 |
 |
Filter coil for electronics VISHAY
ELECTRICAL SPECIFICATIONS Inductance: Measured at 1.0 V with zero DC current Incremental Current: The typical current at which the inductance will be decreased by 5 % from its initial...
 |
 |
Power factor correction choke 80 - 500 μH | PFC Series PREMO CORPORATION
Features: -Chokes for CCM PFC operation -Can be used in a wide range of sinusoidal absorption rectifier circuits -Mounting onto water-plate...
 |
 |
Common-mode choke for electronics Profec Technologies
The P7500 family is suitable for Common Mode suppression across a broad range of signal applications. Good...
