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Solenoid Switches / DC Contactors / Universal Solenoids


The solenoid switch, also known as a relay or DC contactor, is a mechanical switch that uses a coil to generate a magnetic field to control a larger current with a smaller one.


Solenoid switches are widely used in industrial control design, for various lifting equipment, small scale indoor/outdoor industrial engines, forklifts, and winches.


They are also employed on the hydraulic equipment of golf carts, electric vehicles, work trucks, and busses.


CB manufactures and sells solenoid switches that have improved on the shortcomings of traditional design. With 30 years experience in technical strength, CB provides the most reliable products on the market.


CB supplies two types of solenoid switches for DC motors: Continuous and Intermittent.


Abridged Definition:


Devices connected to the continuous solenoid switch are in use continuously. As the coil is in continuous use, high temperatures/overheating is an issue.


CB has selected a special silver alloy for this type of switch and has thus passed the load test.


Devices connected to the intermittent solenoid switch are in use intermittently; that is, repeatedly on and off, which may happen with regularity.


As this type of switch is used repeatedly, so it highlights the performance of suction and release. Subsequently, CB reinforces the contact point for this type of switch to reduce surface wear. As a result, the intermittent solenoid switch has passed tens of thousands of duty cycle life tests.


Please note: To prevent switch burnout or abnormal suction and discharge, please be sure to choose a model with higher specifications than the required current you need!

What is a relay?


A relay is an electrically operated switch. It consists of a set of input terminals for a single or multiple control signals, and a set of operating contact terminals. The switch may have any number of contacts in multiple contact forms, such as make contacts, break contacts, or combinations thereof.

Relays are used where it is necessary to control a circuit by an independent low-power signal, or where several circuits must be controlled by one signal. Relays were first used in long-distance telegraph circuits as signal repeaters: they refresh the signal coming in from one circuit by transmitting it on another circuit. Relays were used extensively in telephone exchanges and early computers to perform logical operations.

The traditional form of a relay uses an electromagnet to close or open the contacts, but other operating principles have been invented, such as in solid-state relays which use semiconductor properties for control without relying on moving parts. Relays with calibrated operating characteristics and sometimes multiple operating coils are used to protect electrical circuits from overload or faults; in modern electric power systems these functions are performed by digital instruments still called protective relays.

Latching relays require only a single pulse of control power to operate the switch persistently. Another pulse applied to a second set of control terminals, or a pulse with opposite polarity, resets the switch, while repeated pulses of the same kind have no effects. Magnetic latching relays are useful in applications when interrupted power should not affect the circuits that the relay is controlling.

Source article: Wikipedia

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