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This section provides an overview for shock resistant relays as well as their applications and principles. Also, please take a look at the list of 18 shock resistant relay manufacturers and their company rankings. Here are the top-ranked shock resistant relay companies as of December, 2024: 1.Cit Relay & Switch, 2.NTE Electronics, Inc, 3.U.S. Tsubaki Inc..
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Engaged in research on nitride semiconductor growth using the MBE method at Waseda University Graduate School. After graduating from graduate school in 2016, he joined a non-ferrous metal manufacturer.
Engaged in equipment maintenance and engineering work at metal smelting plants. Moved to a chemical manufacturer in 2022. Engaging in similar tasks.
A shock resistant relay is a safety device that prevents equipment from malfunctioning due to overload.
When a set current value is exceeded, a contact signal is output to stop the equipment. Shock Resistant Relays play an important role in preventing accidents involving property or personnel.
Compared to mechanical safety devices such as shock guards, shock relays have the advantage that they do not require extensive equipment modifications.
Shock resistant relays are safety devices used in conveyors. The following are examples of shock resistant relay applications:
Overcurrent protection devices include circuit breakers and thermal relays, which protect motors and upper circuits. These devices prevent the spread of accidents to higher-level circuits due to motor short circuits and burnout due to overloads. Shock resistant relays, on the other hand, are devices that prevent overloading of conveyors and other loads.
Reduction gear motors are used in chain conveyors and winders. Although the speed of the motor with a speed reducer is low, a strong torque is applied when the load shaft is overloaded. This strong torque may cause chain breakage or equipment failure.
If a foreign object is caught in the chain, it can be recovered in a short time, but if the chain breaks, it is difficult to recover immediately. In addition, if the broken chain recoils and strikes a human body, there is a risk of personal injury. To prevent this, shock resistant relays can immediately detect over-torque and stop the motor.
A shock resistant relay consists of a current transformer, display/control unit, and output unit.
The current transformer is a component that detects the current of the motor. It consists of two coils wound around an iron core, etc. There are integrated types and separate types. The integrated type is used for small capacity motors, while the separately mounted type is used for large capacity motors.
The display/control section displays the current value and sets parameters. Rotary switches are often used to set parameters.
The output part is a component that transmits digital signals of overcurrent to the outside. Relay contact outputs using electromagnetic coils are mainly used. This contact output stops a drive device such as an electromagnetic contactor and shuts off power to the motor.
Shock resistant relays are often specified in terms of recommended capacity by the manufacturer. If a current transformer is installed separately, match the specifications of the current transformer to the capacity of the motor used.
The type of output signal must also be selected. There are self-holding type and self-resetting type, which should be selected according to the control circuit. For the display, either a digital display or an analog display can be selected. In most cases, digital displays are easier to read, but analog displays are often more robust.
Some products may have functions other than overload. Products that detect and transmit missing phases or unbalance are also available, and products with the required functions are selected.
Shock resistant relays are electronic control components that are generally sensitive to moisture and dust. Therefore, in most cases, they are stored inside control panels. The most common method of mounting a shock relay inside a control panel is to mount it on a circuit board using a DIN rail or the like.
Inside the control panel, they are connected to the electrical wiring and control circuits of the motor. Wrap the motor's main circuit wiring around the current transformer and connect the output terminals to the control circuit. If a power supply for shock resistant relay is required, it is generally introduced from the control circuit.
Shock resistant relay settings must also be implemented. The minimum operating current value and operating time must be set, and these should be set by checking the load current and starting current during normal operation.
Depending on the specifications of the shock resistant relay, a secondary current of 0 to 5 A is generally used for the current transformer. In such cases, the operating current is often set around 0 to 6 A while watching the load current. The operating time is generally set between several seconds and several tens of seconds.
*Including some distributors, etc.
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NTE Electronics, Inc, established in 1976, and based in New Jersey, USA, is a manufacturer and supplier of electrical components and equipment. The product portfolio of the company includes wide range of bulbs, cable management, semiconductors, chemicals, adhesives, connectors, optoelectronics, power products, passive components, tools, and hardware. The company products are ISO certified and include 23000 devices. The products are used in many industries like electrical, chemical, and other consumer or commercial applications.
Sensata Technologies was originally founded in 1916 as General Plate Company and is now headquartered in Attleboro, Massachusetts. The company is a developer, manufacturer, and seller of sensors and sensor-rich solutions, electrical protection components, and other products used in automotive, industrial, energy, telecom, and construction industries. The company has 20 product categories including force sensors, tire management solutions, inverters & charges, and pressure sensors.The company’s next generation of products are designed to improve the efficiency of industrial pumps, fuel efficiency in ICE cars and energy efficiency in TVs, and facilitate usage of IoT devices.
Ross Engineering Corporation, founded in 1964 and based in Campbell, California, is a manufacturer of a wide range of high-voltage electronic and electro-mechanical devices and is ISO 9001 certified. It stocks over 25 lines of high voltage devices such as voltmeters, relays, and probes used in several fields such as industrial plants, communication transmitters, and power supplies with ranges from 0.01mV to 1,200,000 V. The company is ISO/IEC 17025:2017 certified and has a calibration lab for testing and calibrating dividers, relays, and probes up to 450kV.
CIT Relay & Switch is based in Rogers, Minnesota, and is a manufacturer of RoHS-compliant electromechanical relays and switches with the ability to offer integrated solutions for individual customers’ design needs. CIT’s relays are commonly used in automobiles and low-voltage operations. CIT’s switch catalog includes varieties such as surface mount, panel mount, tactile, pushbutton, and more. CIT has a lab for a new design, validation product testing, IQC, failure analysis, and material testing. IQC ensures documented reliability by testing contact material, resistance, dielectric strength, and other parameters. CIT also provides engineering and application support for materials and processes.
Steven Engineering is a distributor and manufacturer of industrial controls and components that is headquartered in South San Francisco, California, and was established in 1975. The company has over two million available part numbers and a vast supporting inventory of products such as electrical components, automated industrial controls, and pneumatic products. Steven Engineering's products are used in numerous industries, including the manufacturing, transportation, and energy industries. The company provides many services including management, training and education, procurement assistance, certified supplier programs and contract manufacturing services such as engraving and kit assembly.
Geya is an electrical equipment manufacturer established in China in 2007. It produces electrical control devices, low voltage protection devices, solar energy equipment, and circuit breaker SKDs in compliance with CE, UL, and other international certification standards. The company's ISO 9001-certified factory has a production capacity of over 100,000 parts per month, it offers OEM and ODM services for the development of custom solutions, and it exports to over 30 countries.
Founded in 1984, Xiamen Hongfa Electroacoustic Co., Ltd. is a manufacturer specializing in relays, connectors, precision manufacturing parts, and automation equipment. Headquartered in Xiamen, China, the company has established 30 subsidiaries worldwide, serving over 120 countries and regions. HONGFA offers customized solutions utilizing its electrical appliances and complete equipment. Its wide range of products finds applications in various industries such as smart homes, smart grids, industrial control, automotive and railway transportation, and the Internet of Things. The company has received multiple awards, including the 2023 National Enterprise Culture Outstanding Achievement by China Enterprise Confederation and China Entrepreneurs Association.
Ningbo Forward Relay Corp.,Ltd., founded in Zhejiang, China, in 1986 is a manufacturer of electromagnetic relays. The company's product portfolio includes signal relays, automotive relays, industrial relays, and power relays. The company serves industries such as Oil and Gas, Aerospace and Defense, Automotive and Transportation, Construction, and Power Generation. The company also provides services including national distribution, product selection, customized services, technical support and customer service. They have SO9001, IATF16949, ISO14001 quality certifications.
Schneider Electric S.E. is headquartered in Rueil-Malmaison, France, and has been operating since 1836. Schneider Electric provides a number of products and services including electrical car charging, energy management software, surge protection devices, load banks, servers and HMIs, valve and valve actuators, feeder automation, grid automation, and SCADA software products, data center cooling and software, home automation and security, light switches, motion control and robotics, signaling units, solar and energy storage, RFID systems, as well as other hardware, services, and software.
U.S. Tsubaki Power Transmission LLC., founded in 1971 and based in Wheeling, Illinois, is a manufacturer and supplier of motion control and power transmission products and is ISO 9001 certified. Its products include sprockets, conveyor chains, and roller chains used in several industries, including automotive, primary metals, and forest products. It’s a subsidiary of the Tsubakimoto Chain Company, and it has several manufacturing facilities in the United States, including Milwaukee (WI), Sandusky (OH), and Chicopee (MA). The company sells its products through distribution channels but can sell directly to qualified OEMs.
Struthers-Dunn is headquartered in Timmonsville, South Carolina, and was established in 1923, making it one of the oldest relay manufacturers in the world. The company’s relays and related electrical components are utilized in traffic signals, power generation, factory automation, construction, and water treatment applications. The company’s product lines primarily consist of relays such as general purpose, motor, timer, and sequencing relays. Other products include accessories and special-purpose relays for super high voltage applications such as gas turbine power plants.
BETA Electric Industry was founded in 1973 in Taipei, Taiwan as a manufacturer and supplier of electric components. The company designs various relays which include general purpose relays, along with Mechanical Indicator relays for control panel direct load switching, sequence control, industrial automation controllers, video projector systems, and more along with manufacturing special relays for applications in various devices and industries such as electric rolling doors, power control systems, industrial automation, and printing machines.
Tsubaki of Canada was founded in 1973 as a Canadian subsidiary of Tsubakimoto Chain Company, originally founded in Japan in 1917. The company is a producer and distributor of precision roller chains and other power transmission products to industries including food & beverage, aggregate & cement, automotive, forestry, and primary metals. The company’s primary product lines are roller & engineering class chains, sprockets, cable & hose carriers, PT components, and backstops & clutches. The company also offers advanced customer service including chain, sprocket, and system analysis, optimization, maintenance, and training.
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.
American Distributors LLC (ADI) was founded in 1983 and has corporate offices in Randolph, New Jersey. ADI manufactures and distributes products for medical diagnostics, industrial usage, maritime usage, aerospace, and military. ADI is ISO 9001:2015 certified. ADI’s product line includes capacitors, chip resistors, coils, chocks, connectors, crystals, diodes, fans, filters, fuses, hardware & accessories, heat shrinkable tubing, inductors, integrated circuits, lamps & lighting development, networks equipment, Parylene coating, relays, resistors, semiconductors, IC sockets & terminals, switches, transistors, and wire & cable.
DENSO Products and Services Americas, Inc., a subsidiary of DENSO Corporation, is a US-based company established in 1971 which distributes non-automotive products, as well as the remanufacturing of automotive electrical components. The company is a pioneer in the field of industrial robotics and is the largest user of small assembly robots utilized by companies worldwide. Their success can be attributed to their strong partnerships and accomplishments in the industrial robotics sector, remaining at the forefront of the industry.
Yaskawa America Inc., started in 1967 and based in Waukegan, Illinois, is a manufacturer of machine controllers, industrial robots, and variable frequency drives and is part of Yaskawa Electric Corporation. Some of its products include industrial AC drives, machine controllers, and IEC programmable robots. The company incorporates the Kaizen method of continuous incremental improvements and Total Quality Management processes to prevent manufacturing defects, and its distributors must be certified and re-certified every two years. It is ISO 9001 certified and is the only industrial drives and motion control manufacturer to win the Deming Medal.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Cit Relay & Switch |
13.6%
|
| 2 | NTE Electronics, Inc |
13.6%
|
| 3 | BETA ELECTRIC INDUSTRY CO., LTD. |
9.1%
|
| 4 | Ningbo Forward Relay Corp.,Ltd |
9.1%
|
| 5 | Ross Engineering Corp. |
9.1%
|
| 6 | Xiamen Hongfa Electroacoustic Co.,Ltd. |
9.1%
|
| 7 | Sensata Technologies, Inc. |
9.1%
|
| 8 | DENSO Products and Services Americas, Inc. |
4.5%
|
| 9 | DFX Technologies, LLC |
4.5%
|
| 10 | GEYA |
4.5%
|
Derivation Method
The ranking is calculated based on the click share within the shock resistant relay 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
|
5 | 41.7% |
|
China
|
3 | 25.0% |
|
Canada
|
2 | 16.7% |
|
France
|
1 | 8.3% |
|
Taiwan
|
1 | 8.3% |
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