CASO242

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Solid State Relays are high-performance electrical components that offer reliable switching control between two electrical circuits. The CASO242 is a Solid State Relay developed by Curtiss-Wright Controls, Inc. for application in industrial and commercial installations. It offers an extreme level of reliability in a variety of applications. This guide will cover the application field and working principle of the CASO242.

The CASO242 is intended for general purpose low-level switching in applications such as domestic and industrial lighting, temperature and process controls and air conditioning. It offers a cost-effective solution to a number of relaying challenges. It is designed to switch loads with power ratings up to 10A and voltage ratings up to 250V AC. The device is compatible with 3-wire and 4-wire thermal resistors as well as with micro switches and low-level transistor circuits.

The CASO242 is extremely reliable and comes with an integrated protection circuit which prevents contact corrosion due to high AC resistance at start-up. It also provides protection against short-circuiting and overload, as well as against damage due to ESD, reverse polarity and inrush currents. The device offers a wide temperature range (with a maximum ambient operating temperature of 85°C) and exhibits excellent electrical insulation characteristics.

The CASO242 works on the principle of an opto-triac, which utilises an opto-isolated input. This means that the input circuit is galvanically isolated from the output circuit, ensuring safe and reliable operation. The opto-triac consists of an LED light source, a triac and a photocoupler, which converts the input voltage signal into an output current. The LED emits light, which is detected by the photocoupler, triggering the triac to switch on or off, thus enabling the control of the output circuit.

The CASO242 is the ideal choice for a number of switching applications, including switching commercial and industrial lighting, temperature and process controls, and air conditioning systems. It is reliable, cost-effective and designed to offer superior system performance. With its wide temperature range and its integrated protection circuit, the CASO242 provides a safe and reliable solution for a variety of application requirements.

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