LH1518AAB

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Solid State Relays

Solid state relays are electronic switching devices that switch on and off depending on an external control signal. They are designed to control electric power to resistive and inductive loads and have low switching loss, fast response time, and long life. The LH1518AAB is a type of solid state relay designed for use in industrial automation and other industries that require high switching performance.

LH1518AAB Application Field

LH1518AAB solid state relays have a wide range of applications across various industries. In industrial automation, they can be used for load control, temperature and pressure control, and for electric system protection/monitoring. They can also be used for switching AC and DC load circuits, for automatic room temperature control, and in industrial equipment like lighting, welding, printing presses, motors, pumps, AC/DC fans, and gas control.

LH1518AAB Working Principle

The LH1518AAB solid state relay utilizes semiconductor switching technology to switch on and off. In operation, the control signal is provided to the SSR input side, triggering a semiconductor switch to close, resulting in power being supplied to the load through the SSR output. The output side is reversely isolated from input side with high withstand voltage to avoid accidental electrical shock. The LH1518AAB features a built-in over-temperature protection circuit to protect itself against damage in case of overheating.

Advanced features of the LH1518AAB include a zero-cross detection circuit, which allows the relay to provide a more precise control signal and smooth switching operation even when the AC load is changing rapidly. Furthermore, the device has an adjustable output transistor trigger controller which allows the user to set the switching threshold according to the application.

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