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This section provides an overview for line filters as well as their applications and principles. Also, please take a look at the list of 21 line filter manufacturers and their company rankings. Here are the top-ranked line filter companies as of December, 2024: 1.PLC Hardware, 2.Schroeder Industries, 3.Coilcraft Inc..
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A line filter is a filter that is inserted into the power supply line of a device to eliminate noise generated by the device and noise coming in from external devices. They are also called noise filters because they are used to remove noise.
Generally, noise emission is called EMI (Electromagnetic Interference), and noise radiation from external devices is called EMS (Electro Magnetic Susceptibility: EMS). In addition, various types of equipment must be designed to suppress their noise generation and not be affected by noise from peripheral equipment. This is called EMC (Electro Magnetic Compatibility).
Line filters are used to achieve this EMC and are used either in the power supply line inside the equipment or outside the equipment.
Line filters are a type of low-pass filter. This is because the main component of noise in digital equipment is the high-frequency waves generated by the various digital ICs mounted on the printed circuit boards of the equipment.
It is effective to install line filters as close as possible to noise-generating equipment. The greater the distance, the more likely it is that noise will propagate through the space between them.
The ground wire coming from the line filter should be as short as possible. If it is longer, the noise rejection effect may be reduced by half.
Noise generated by electronic and electric circuits is becoming increasingly higher in operating frequency as the scale of circuits grows larger and more sophisticated. As a result, the noise generated is also becoming higher frequency, and its removal is becoming more and more difficult.
There are two types of noise generated by devices: radiation noise and propagation noise. Radiated noise is a type of noise in which high-frequency signals generated in circuits propagate through the air and interfere with other equipment.
Propagation noise is the type of noise that interferes with other devices via the power cables and signal cables of devices. These types of noise can lead to malfunctions of electronic and electrical equipment or, in the worst case, to equipment destruction.
Line filters to eliminate such noise consist of coils, capacitors, and ferrite cores.
Coils and ferrite cores allow low-frequency signals to pass through these devices unconditionally. However, the higher the frequency of the signal, the more difficult it is to pass through. By directly connecting these coils and ferrite cores to the signal line, noise radiation is suppressed.
A capacitor, on the other hand, does not allow low-frequency signals to pass through but has the characteristic of allowing signals to pass through more easily as the frequency increases. By placing this capacitor between the signal line and ground, high-frequency signals are discarded on the ground side, thereby suppressing noise radiation together with the coil and ferrite core.
Furthermore, by connecting multiple low-pass filters consisting of the coil, ferrite core, and capacitor in a vertical connection, the frequency selectivity can be further increased. In other words, the desired low frequencies can be passed through more easily and unwanted high frequencies can be eliminated.
*Including some distributors, etc.
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Win Source Electronics is an AS9120B-certified business-to-business (B2B) distributor of electronic products, accessories and components that was established in Shenzhen, China, in 1999. The company stocks products from over 3,000 manufacturers, including C&K Components, Fujitsu Electronics America, and American Zettler, Inc. These products include power supplies and converters, memory modules, and RFID devices for wireless communication. The company primarily markets its products to clients in Asia's consumer electronics, energy, and industrial manufacturing sectors.
OnFILTER is a manufacturer and supplier of EMI filters for various applications based in California, USA. Founded in 2010, the company specializes in delivering clean, noise-free power and ground free of electromagnetic interference (EMI). The company acknowledges that EMI-free power is essential for the proper functioning of equipment across a wide range of industries. Additionally, the company provides custom EMI solutions based on the unique requirements of its clients. These solutions involve specialized EMI filters and related technologies.
Power Systems & Controls (PS&C) was incorporated in 1965 in Virginia as a manufacturer and supplier of power conditioning systems. The company manufactures Static (Solid State), Rotary, and Hybrid equipment which includes UPS, DC Power supplies and inverters, and Frequency Converters along with Monitoring, Control, and Power Conditioning Products. They also provide enclosures and shelters such as Living Quarters, Data Centers, Equipment shelters, and Modular Shelter solutions. Industries such as Research and Test Labs, Manufacturing Plants, Universities, and Training Institutes, and places like Airports, Hospitals, and Commercial Facilities utilize the products manufactured by PS&C.
Curtis Industries, founded in 1933, is a specialized electrical component manufacturer and supplier based in Wisconsin, Milwaukee. The company manufactures custom and standard terminal blocks, EMI/RFI power line filters, printed circuit board blocks, and other custom plastic molded electrical and electronic components for industrial applications. Their products cater to various industries including aerospace, communications, medical, military, and more. With ISO 9001:2015 certification and adherence to UL and ITAR standards, Curtis Industries is a global company with component centers in both North America and Asia.
Genisco Filter is a manufacturer of EMI/RFI (Electromagnetic Interference/Radio Frequency Interference filters since 1999. Headquartered in Oklahoma, USA, the company's product lineup includes power line filters, communication filters, fire alarm filters, and high amp filters. The company also offers custom filter solutions tailored to its client's specific needs. All of its filters are UL-certified. EMI/RFI filters help protect against equipment damage caused by EMI/RFI interference and can also improve performance by reducing noise, ensuring the safety of your equipment and personnel. The company serves various industries including, electronics, aerospace and defense, telecommunications, and more.
Schroeder Industries was founded in 1946 and is headquartered in Leetsdale, Pennsylvania. The company is an ISO 9001-certified manufacturer and designer of advanced fluid conditioning solutions for markets including automotive, power generation, steel making, water treatment, and bulk fuels. The company’s primary product categories include filter systems, filters, and Internet of Things diagnostics. The company also offers services including sensor calibration, fluid contamination audit, rental equipment, and filtration management as a service (FMAAS) solutions.
PLC Hardware (PLCH) was founded in 1993 and operates out of Owings Mills, Maryland. PLCH is an independent distributor of used and surplus industrial automation and networking equipment. PLCH offers a 1-year warranty on all products and ships globally. PLCH’s emphasis is on hardware and distributes hardware from such brands as Cisco, HP Networking, Rockwell Automation and Siemens. A few of the many categories of hardware include application networking products, cables, optical networking systems, routers, switches, rack servers, content delivery devices, as well as HVAC controllers, and safety integrated systems.
Industrial Specialties Manufacturing (ISM) was founded in 1982 in Denver Colorado. is an ISO 9001 company that supplies miniature pneumatic, vacuum, and fluid circuitry components to OEMs and distributors all over the world as well as providing custom solutions. The company serves distributors and offers not just sales but also marketing and logistics support with closed-loop feedback. Some of the types of products ISM offers include plastic fittings, customized fittings, sub-assemblies, and custom heat seal tooling.
Coilcraft was founded in 1945 and is headquartered in Cary, Illinois. The company is a designer, manufacturer, and distributor of high-performance magnetic components for industries including automotive and computing. The company’s standard products include power devices such as inductors, RF devices, transformers, and EMI components. The company’s automotive division offers transformers, inductors, chokes, and filters operation down to -40 degrees. The company also offers design tools to help customers understand the correct product for their needs and optimum system operational parameters.
K Controls, a British company, specializes in developing, manufacturing, and distributing industrial valves, actuators, and control equipment to various sectors, including oil and gas, petrochemicals, and water treatment. For over four decades, the company has delivered inventive and dependable solutions to intricate engineering problems, earning it an excellent reputation. Among its achievements is the Queen's Award for Enterprise in International Trade, which it received in 2015 for contributing significantly to the UK economy through exports. K Controls is a provider of industrial control equipment both locally and globally, thanks to its strong devotion to originality and customer service.
Circle Valve was founded in 1986 and headquartered in Harleysville, Pennsylvania. Circle Valve is a value-added distributor and manufacture rep of industrial valves, fittings, filters, and measurement control devices for a variety of industries and applications. Among Circle Valve’s product listings are check valves, relief valves, vacuum & high purity fittings, circle seal solenoid valves, Jefferson solenoid valves, Atkomatic solenoid valves GO regulators, cryogenic valves & equipment, hoke valves, Gyrolok Tube Fittings, Circle Seal Control Valves, and various measurement devices.
TDK-Lambda serves the communications, medical, factory automation, semiconductor, transportation, LED display, and energy industries with a variety of power-related products. Among these products are onboard power supplies, PC board power supplies, noise filters, linear power supplies, unit and configurable power supplies, programmables power supplies, power modules, and bidirectional DC-DC converters.
Taisei Kogyo Co., Ltd., established in 1957 and headquartered in Tokyo, Japan, is a manufacturer of oil filters and heat exchangers for industrial machinery and related sectors. Its product line includes hydraulic filters, suction strainers, suction line filters, as well as in-line filters, and duplex filters, designed to remove contaminants and enhance system stability, ultimately extending component and system lifespans. The company has achieved ISO 13485 medical management system certification in 2019.
EEP also known as European EMC Products, based in the UK, is a manufacturer of shielding systems since 1996. The company specializes in designing, manufacturing, installing, and commissioning shielding systems. These systems are intended to provide protection against various threats, including Electromagnetic and Radio Frequency Interference (RFI/EMI), radiation, magnetic fields, and electromagnetic pulses. Beyond shielding solutions, the company offers a comprehensive suite of services. These encompass testing, surveying, project management, and consultancy.
Ueno Co., Ltd., established in 1982 with headquarters in Tsuruoka City, Japan, is a manufacturer specializing in noise suppression electronic components. The company's product line includes noise filter coils, smoothing and boosting chokes, coils, and Ferrite cores. The components are used in electronic and electric devices for radiation noise suppression, modulating power supply, absorbing power current noise, and keeping interference in as well as out for such products as USB charging cables, audio/visual signaling equipment, conveyors, and elevators. The company serves industries including automotive, consumer products, energy supply, medical, and agriculture.
Sarayli, established in 1990 and headquartered in Konya, Turkey, is a ladder and scaffolding designer and manufacturer. The company's products include aluminum scaffolding, industrial ladders, and portable platform step systems. These products are used on construction sites, in commercial warehousing facilities, and as access equipment for maintenance and services. It also manufactures residential-use telescopic ladders, laundry drying frames, and ironing boards. The company provides custom product manufacturing and full OEM and ODM services.
Shimaden Co., Ltd. is a manufacturer of industrial temperature and humidity control equipment founded in 1953 and based in Tokyo, Japan. The company manufactures a wide range of products for monitoring and controlling environmental factors. Its products include various sensor converters for humidity, digital or analog flow rate controllers, and thyristor power regulators for controlling isothermal tanks. These products are mainly used by clients in the food and beverage, chemical processing, and metal fabrication sectors. The company also offers control and data acquisition software for customers needing additional support.
Haskel began in 1954 and is now part of Ingersoll Rand. Haskel is a designer and manufacturer of high-pressure industrial gas and liquid handling equipment in three categories: hydrogen refueling, products, and aftermarket. Hydrogen refueling includes, refueling stations, hydrogen compressors, hydrogen compression and transfer, hydrogen valves fitting and tubing. Products include liquid pumps, refrigerant pumps, gas boost compressors, air pressure amplifiers, packaged systems, spare parts, system components, and high pressure valves. Aftermarket support includes support for hydrogen stations, repair, maintenance, service, and spare parts.
LUBE Corporation, established in 1964 and based in Chiyodaku, Tokyo, Japan, is a manufacturer and supplier of lubrication equipment. The company's product range includes World standard LHL system grease lubrication system, Battery drive grease kit, Main pipe decompression system, Progress method, and Multi-Port Centralized Lubrication System. These products ensure optimal lubrication and protection for machinery. It serves industries such as manufacturing, automation, machinery design, and environmental safety. The company also offers services in development, manufacturing, sales, and after-sales service for its range of equipment.
Classic Automation based in Webster, New York is a parts distributor and repair servicer for installed controlled systems, drives, and servo motors, as well as a purchaser of well-maintained surplus systems. Parts that Classic Automation distributes and repairs include DcS, PPLC, and CNC control systems, panel controllers, HMI panels, display panels, drives, encoders, resolvers, and power supplies. Classic automation also offers hard drive repair services and support for customizing functionality in Panelicity controllers.
MPE-Garry GmbH, founded in 1974 and headquartered in Füssen, Germany, is a connector system developer, designer, and manufacturer. The company's core products include standard and customized connectors, such as device plugs and sockets, heat sinks, and custom cable assemblies. These products are used to manufacture numerous devices, including laptops, home appliances, and other consumer electronics. The company's services include the supply of technical support and flexible production capabilities through its international distributors.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | PLC Hardware |
33.3%
|
| 2 | Schroeder Industries |
33.3%
|
| 3 | Coilcraft Inc. |
33.3%
|
Derivation Method
The ranking is calculated based on the click share within the line filter page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
10 | 66.7% |
|
Japan
|
3 | 20.0% |
|
China
|
1 | 6.7% |
|
United Kingdom
|
1 | 6.7% |
114 products found
114 products
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Keisei Co., Ltd.
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