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This section provides an overview for magnetic switches as well as their applications and principles. Also, please take a look at the list of 14 magnetic switch manufacturers and their company rankings. Here are the top-ranked magnetic switch companies as of January, 2025: 1.Kinematics & Controls Corporation, 2.ReeR S.p.A., 3.FW Murphy.
Table of Contents
A magnetic switch is a switch that combines an electromagnetic contactor, whose contact is switched open and closed by an electromagnet, and a thermal relay, which interrupts the circuit when overloaded.
In a circuit that supplies power to a load, it functions as a protective device for the load in the event of an overload (overcurrent).
A breaker is a similar protective device, but whereas a breaker protects wires and prevents short-circuit accidents, a magnet switch prevents overcurrents to the load.
A magnet switch is a device that shuts off power in the event of an overcurrent and is capable of interrupting currents of about 10 or more times the rated output.
This function is mainly used to protect motors, quickly detecting and stopping the operation of a motor in a missing-phase state (a motor running in single-phase operation when it should be running in three-phase operation) due to a broken wire or poor contact, etc., thereby preventing motor failure due to overload.
Magnet normally switches have three main contacts, which are connected to a star-connected or delta-connected coil when used to protect a 3-phase motor.
A magnet switch consists of an electromagnetic contactor and a thermal relay. The thermal relay thermally senses the current and trips in the event of an overcurrent. contact opens and shuts off the power supply in the event of an overcurrent. The a-contact output can also be used by connecting it to an abnormality display, etc.
Pressing the reset button after the thermal relay has cooled to air will restore power, but if the overload condition continues, power will be immediately shut off again.
Electromagnetic contacts require mirror contacts to reliably detect the welding of the contacts. Mirror contact is a feature that guarantees that if one of the main contacts (the normally used contact) is closed, the auxiliary contact, which is NC (normally closed), will be open. The mirror contact allows the detection of a welded main contact if the auxiliary contact is open when the coil is OFF (not attempting to close the contact).
*Including some distributors, etc.
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FW Murphy Production Controls, established in 1939, is based in Oklahoma, United States, as an engine management equipment manufacturer. It specializes in manufacturing electronic and mechanical controllers, compressor control panels, air-fuel ratio controls, scrubber controls, and valves. Its products cater to oil production and natural gas compression sectors across the USA and China. The company is a subsidiary of Genisys Controls, LLC, and has acquired ISO 9001 certification. It also partnered with Ariel Corporation to create the Ariel Smart Compressor system for compression monitoring and collaborated with 7 Compression to establish Titan-Flex, a technology for engines and compressors.
MagneLink, Inc. was incorporated in 1990 and is headquartered in Hillsboro, Oregon. The company is a manufacturer of magnetic switches and related products for customers in the automotive, industrial, medical, aerospace, and transportation industries. The company’s four product lines are Magnetic Switches, Defeat-Resistant (Coded) Magnetic Switches, Magnets, and Accessories. Standard switches are used in robotics, automated product handling, and other uses. Defeat-Resistant Switches use solid-state technology providing extra protection. Accessories include various connectors and adapters for switches.
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.
Vitzro EM Co is based in Seoul, South Korea, and is a manufacturer of electric power systems and equipment that was established in 1989 as a subsidiary of the Vitzro Group. The company offers vacuum circuit breakers (VCBs) that utilize vacuum pressure to interrupt electric currents, and gas-insulated switchgears (GIS) that utilize pressurized gas to interrupt or insulate electric currents. It also offers power transformers for transmission, generation, or distribution applications. The company chiefly serves client operators of industrial plants, electric utilities, and renewable energy arrays.
ReeR S.p.A., founded in 1959 in Turin, Italy, is a manufacturer of optoelectronic sensors and controllers for industrial safety. Its products, including laser scanners, contactless interlocks, and photocells, are essential in manufacturing, robotics, automotive, and packaging industries. The company's innovation culture and adherence to ISO9001 specifications lead to the highest level of protection for workers and equipment and make products appealing to global clients. ReeR S.p.A provides technical support and know-how for clients to select, install, and maintain safety solutions.
NWS, founded in 1973 and headquartered in Solingen, Germany, is a manufacturer of hand tools, electronic tools, automotive tools, and various types of specialized tools. The company holds ISO 9001 certification, verifying that the products are manufactured to industry standards and delivering benefits such as precision, durability, and stability to customers. The broad range of products includes industrial tools, safety tools, electrojoining tools, plumber tools, and sheet metal forming tools made with streamlined CNC technology and precision. It offers a wide range of tools for professionals and DIY enthusiasts, serving industries such as automotive, electronics, construction, and general manufacturing.
Hitachi, Ltd was established in 2002 and headquartered in Chiyoda-ku, Tokyo is a manufacturer of industrial electrical equipment and system solutions. The company offers an extensive and diversified product portfolio including industrial drive systems, power electronics, energy-related equipment, power distribution systems, and various other industrial solutions. These products serve as integral components that drive advancements in industrial capabilities across diverse sectors by playing a pivotal role in promoting energy conservation and storage, automating robot systems in large factories, enabling smarter manufacturing through digital solutions, and facilitating efficient transportation within industrial facilities.
ALPS ALPINE CO., established in 1948, is a manufacturer and supplier of sensors＆communication, modules＆systems, and components based in Tokyo, Japan. The company serves the energy, healthcare, automotive, mobile, and consumer electronics domains, where they combine and build on core device technology, including human-machine interfaces, SENSORING™, and connectivity. For example, in the healthcare industry, they supply components for medical equipment, including control switches, sensors, lenses, and joysticks, and the Senclear™ Microfluidic Devices for drug discovery and development. Their power conversion modules, current sensors inverters, and converters are used in the energy industry in storage batteries, solar power systems, and electric vehicle charging systems.
Thomas White Limited, conveniently located near Leicester, UK, has been a manufacturer of magnetic switches, reed switches, GMR switches, and proximity sensors for industrial applications since 1904. The company’s magnetic switches and reed switches are used for engineering applications, such as liquid flow, pneumatic cylinders, counting systems, and door and window security. The company serves clients in automation and robotics, in industries, such as automotive, food processing, marine, and medicine. It currently supplies magnetic switches and its other products to countries in Europe, Africa, South America, and North America.
SENGATE, established in 1980 and located in Taiwan, is a manufacturer and supplier of security products for both residential and commercial properties. The company's product line includes photoelectric beam sensors, prox readers, magnetic shutter sensors, glass sensors, and taut wire fence sensors. This ISO: 9001 certified company also provides fence sensors, magnetic switch sensors, and emergency buttons. All of these products come with CE, FCC and IP rating certifications, and serve the security markets in Asia, Africa, Europe, and North America.
NOARK is based in Pomona, California, and is a global manufacturer of low-voltage electrical components for industrial applications. NOARK specializes in motor controls and protection for original equipment and manufacturers with products covered by five-year limited warranties. NOARK parts are used in numerous solutions such as HVAC and refrigeration, industrial food equipment, panel builders, digital storage, and engine generators. NOARK’s main product lines include low-voltage power circuit breakers, molded case circuit breakers, miniature circuit breakers, overload relays, and circuit control devices.
MOD-TRONIC Instruments Limited was established in 1972 in Brampton, Ontario, Canada. MTis a distributor of industrial sensors, transducers, heaters, controls, and instrumentation, primarily made in the USA as well as Japan, Switzerland, and Germany. MT’s customers are primarily in the aerospace, building automation, manufacturing, medical, military, oil and gas, and water treatment industries but also serves individuals. MT offers an above industry standard 5-year warranty and technical support on every product sold.
Fuji Electric Equipment Control was established in 2008 in Saitama-ken, Japan is a manufacturer of power distribution and control equipment. The company boasts an extensive and diversified product portfolio including motor controls, MV distributors, energy control equipment, LV distributors, and industrial control relays. These products find applications in construction as magnetic contactors, automotive as manual motor starters, home appliances as air circuit breakers, health care devices as sensors and switches, and in environmental management for quality assurance and protection of high-voltage electric power and management of low-voltage consumption rate.
AutomationDirect.com was founded in 1994 to provide solutions for the industrial automation market and has been growing its list of offerings ever since. AutomationDirects’ extensive catalog includes individual components such as cables, various controls, I/O devices, relays, gauges, fittings, and sensors to complete systems. Many parts and devices, especially PLC units are customizable. AutomationDirect.com also provides support via video instructions, online manuals, a learning library, an active community forum to further assist customers.
Ranking as of January 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Kinematics & Controls Corporation |
17.5%
|
| 2 | ReeR S.p.A. |
12.5%
|
| 3 | FW Murphy |
12.5%
|
| 4 | Magnelink, Inc. |
12.5%
|
| 5 | VITZRO EM Co |
10.0%
|
| 6 | SENGATE |
7.5%
|
| 7 | NOARK Electric North America |
7.5%
|
| 8 | Mod-Tronic Instruments Limited |
7.5%
|
| 9 | Hitachi, Ltd. |
5.0%
|
| 10 | Thomas White Limited |
2.5%
|
Derivation Method
The ranking is calculated based on the click share within the magnetic switch page as of January 2025. 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
|
3 | 27.3% |
|
Japan
|
2 | 18.2% |
|
Republic of Korea
|
1 | 9.1% |
|
Italy
|
1 | 9.1% |
|
Germany
|
1 | 9.1% |
|
United Kingdom
|
1 | 9.1% |
|
Taiwan
|
1 | 9.1% |
|
Canada
|
1 | 9.1% |
187 products found
187 products
Albright Japan Co., Ltd.
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SU series contactors offer an economical and space-saving solution to consider as an alternative to standard part numbers. Depending on their suita...
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It opens and closes the fractionation head, and the opening/closing time can be set automatically using the reflux regulator to set the reflux ratio.
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■Overview and features ・Indoor use ・Explosion-proof structure: d2G4 ・Economic type ■Caution ・Specification: Format ・When using outdoors, plea...
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