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Solid State Relays

Solid state relays (SSR) are solid-state electronics, which are used for switching electrical circuits. Specifically, they are used in applications where conventional electromechanical relays cannot operate due to their bulky size, slow switching speed or to reduce electro-mechanical noise.

One example of a solid state relay is the Crydom CN024D24. This relay is specifically designed for use in industrial applications, such as automation control, motor speed control, lighting control systems, and HVAC systems. It is designed for use with DC voltage up to 24 volts, with a load current of up to 24 amps.

CN024D24 Application Field and Working Principle

The CN024D24 is a solid state relay with a zero-crossing, or random, switching function. This means that it switches the connected load only when the input voltage reaches a ‘zero’ state. This eliminates the need for a relay’s moving parts, which can delay or cause problems with the switching process.

The CN024D24 is designed for use with DC voltage up to 24V DC, with a load current of up to 24amps. It utilizes an SCR (Silicon-Controlled Rectifier) as its output switch. The SCR is switched on when the voltage across its gate reaches a predetermined level, and then the current in the load circuit will be determined by the SCR’s applied voltage and current ratings.

The CN024D24 is ideal for applications that require fast and reliable switching, including motor speed controls, lighting controls, and HVAC systems. This SSR also offers a wide temperature range, so it can be used in extreme temperature environments without any difficulties.

The CN024D24 solid state relay offers a high level of reliability and performance, and it is an excellent choice for industrial applications where fast and reliable switching is required.

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