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Coils, Inductors & Magnetics

Coils, inductors and magnetics account for types of fixed and variable coils and inductors, including chokes and reactors. Also included are ferrite parts and materials related to magnetic applications.
AF Coils (93 Companies)
Coils utilized in audio frequency range (defined from 20 Hz to 20 KHz). Applications in impedance matching, speaker crossover networks, telecom products, etc. Coils generally have inductance values from several mH to several hundred mH.
Air Core Coils (82 Companies)
Are coils without core material to achieve its inductance. Have lower loss, higher Q, greater power handling, etc. But more turns needed for a given inductance value–implying larger coils, higher copper loss, susceptibility to stray field radiation, etc.
Antenna Coils (54 Companies)
Coils which are used in design for inductive loading to increase the electrical length of a conductor without increasing its physical length. Generally found in the antenna section of portable radios, in RFID readers, or part of physically short antennas.
Bobbins (120 Companies)
A bobbin is a spindle or cylinder, with or without flanges, on which wire is wound.
Charging Reactors (36 Companies)
Charging reactors are large values of inductors designed to build up high voltages in a circuit. Used in pulse-forming networks and high voltage devices, power modulators, medical equipment, laser systems, and radar.
Chip Coils (86 Companies)
Subminiature coils which are packaged in a chip form and fastened directly to foil patterns. Values usually less than 500 nH. Used in high-frequency applications including mobile phones, high frequency modules, tuners.
Chip Inductors (87 Companies)
Subminiature inductors (usually with ceramic cores) which are packaged in a chip form and fastened directly to foil patterns. Generally manufactured for inductance values from 1nH to 1 mH.
Ferrite Parts (71 Companies)
General term for material mix of iron oxide, metallic compounds, and ceramic material. Results in a high resistivity magnetic compound for electronics. Ferrites formed into cores, antennas, beads, and microwave devices e.g. isolators, circulators, etc.
Filter Chokes (185 Companies)
Usually iron-core coils which allow DC to pass while opposing the passage of pulsating or AC. Most extensively used as filters in power supplies and can be found with inductance values from a few microhenries to several millihenries.
Filter Reactors (66 Companies)
Reactors are large values of inductance used in electronic power equipment to smooth out, or filter, AC ripple voltage in DC supplies without appreciably affecting the passage of DC.
Foil Wound Coils (88 Companies)
Are coils which use metallic foil e.g. copper or silver, as the winding rather than conventional wire. Foil wound coils have higher Q, lower DC resistance, reduced loss, smaller size, greater mechanical strength, etc. than a similar wire-wound component.
Defined as coils which have a high quality factor "Q" (ratio of reactance to its effective series resistance at a given frequency). Designed for use at relatively high frequencies (above 1 MHz).
High Q, Low Frequency Coils (135 Companies)
Defined as coils which have a high quality factor "Q" (ratio of reactance to its effective series resistance at a given frequency). Designed for use at relatively low frequencies (below 1 MHz).
IF Coils (66 Companies)
Relative intermediate frequency terminology derived from the output (sum or difference frequency) from a mixer, down converter, or superhetrodyne receiver. Applications find these coils in double conversion receivers, mixers, filters, etc.
Magnetic Cores (104 Companies)
Magnetic cores are a key component in electromagnets, transformers, and inductors. Cores are placed within a coil to intensify its magnetic field. Since the core material exhibits a high magnetic permeability, the inductance of the coil is increased.
Molded Coils (109 Companies)
A coil which has been encased in molded plastic or ceramic insulation. Generally provides high thermal conductivity to ensure cool operation and longer life.
Pi-Wound Coils (52 Companies)
Generally coils or inductors wound in separate layers on the core with spaces in between the layers. Pi-winding helps to breakup series resonance at high frequencies. Type of coils found in power circuits or designs which have very high inductance values.
Power Inductors (176 Companies)
Inductors specially designed for use in high power applications such as in heavy-duty power supplies and conversion, high voltage applications, power amplifiers, etc. or any application requiring inductances at large current flow.
Power Switching Coils (120 Companies)
Coils or inductors specially designed for use in switching AC to DC power supplies. Used to reduce the high ripple voltage content of the output DC.
RF Coils (147 Companies)
Coils utilized in radio frequency range (defined from 3 MHz to 300 MHz). From a practical usage they are in use from audio to microwave frequencies. Relatively small, coils may be surface or chip mounted, and generally have inductance values under 10mH.
Saturable Reactor Coils (73 Companies)
Coils, or transformers, containing a magnetic core, the reactance of which is controlled by changing the saturation of the core by varying a superimposed unidirectional flux.
Shielded Coils (129 Companies)
General term for coils which are specially wound or constructed to reduce the external flux leakage from affecting circuit quality of the coil or other nearby components. Can also refer to coils surrounded by an electrical shield.
Solenoid Coils (90 Companies)
Consists of an electromagnetically inductive coil wound around a movable steel or iron slug (armature). Coil shaped so that the armature can be moved in/out of the center. Armature used to provide a mechanical force to external mechanism or solenoid.
Surface Mount Coils (95 Companies)
Discrete miniature coils which are packaged without leads and fastened directly to foil patterns.
Surface Mount Inductors (136 Companies)
Inductor components which mount directly on the foil pattern surface of a PCB. Generally found in high frequency design and where space considerations are at a premium.
Swinging Chokes (80 Companies)
A filter inductor designed with an air gap in its magnetic circuit so its inductance decreases as the current through it increases. Used in power supply filter applications.
Switchmode Inductors (137 Companies)
Inductors specially designed for use in switching AC to DC power supplies. Used to reduce the high ripple voltage content of the output DC.
Toroidal Coils (194 Companies)
Typically consisting of a circular ring-shaped magnetic core of iron powder, ferrite, etc. around which wire is coiled to make a coil or inductor. Used in a broad range of HF applications due to its high Q factors and self-shielding properties.
Transformer Coils (203 Companies)
A number of turns of wire wound around an iron core or form made of insulating material that is self-supporting. In practice, coils are usually smaller than transformers, but both are used to introduce inductance into a circuit.
Variable Coils (73 Companies)
Coils that can be varied or adjusted via a shaft, adjustable slug, etc. which changes the permeability of the coil’s inductance. Types of coils are usually found in IF/RF circuitry.
Variable Inductors (62 Companies)
Inductors that can be varied or adjusted, via a shaft, adjustable slug, etc. changing the permeability of the coil’s inductance. Types of inductors are usually found in IF/RF circuitry.

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