A2440-B

Solid State Relays or SSRs are compact, highly efficient and eco-friendly electronic relays meant for the switching of electric currents. They are ideal items for regulating the flow of electric currents, switching on and off when the need arises or under specific events. The A2440-B is one type of solid state relay created by the industry leading manufacturer Moeller Electric.

Main features

The A2490-B works through optical isolation and offers a range of functions, both in the input and output. In the input section, it can be offered with PNP or NPN switch and has a fast switching EMI leakage and a maximum response time of 500 microseconds. The load power control has a wide range and can be offered from 150W to 450W with a switching voltage up to 250VDC or 250VAC.

Applications

The A2490-B is flexible and highly suitable for various applications, both in industrial and residential settings. Depending on the requirements, it can be used on small scale or large scale projects, usually in groups for switch functions such as temperature regulators, motor starters and home appliance control. Its EMI leakage feature makes it a useful component in medical applications as well.

Working Principle

The A2490-B consists of two components; the control element, which supplies the input signals, and the output element, which is the switching element that carries out the switching. In between is the optical isolator, which ensures the output is immune to the operation or failure of the input circuit. In simple terms, when the input circuit receives a signal and supplies a voltage, the optical isolator will detect this and switch on the output element. Depending on the voltage, the output element can then carry out the desired application. The A2490-B is mainly triggered by electrical signals and is designed to be used in closed loop systems with feedback. The closed loop system will constantly monitor the position of the output element and switch the input-output accordingly.

Protection Features

The A2490-B offers a range of integrated protection features to guarantee a safe and reliable operation. It is equipped with brown-out protection that will shut off the output in case of a power failure, electronic reset that ensures every switch off event is completely isolated from the input circuit, and static current limiting that prevents over current situations. Moreover, the A2490-B has a wide operating temperature range between -25°C and +70°C and is rated for up to 250 000 on/off cycles. These features make it highly reliable and practical for a wide range of applications.

Conclusion

The Moeller Electric A2490-B is a highly reliable and robust solid state relay with a wide range of applications. It is ideal for use in closed loop systems with feedback as well as temperature regulation, motor starters and home appliance control. It offers a range of reliable protection features such as brown-out protection, electronic reset and static current limiting. Additionally, it is highly efficient and with its wide working temperature range and up to 250 000 on/off cycles, it is designed to offer a long-lasting and durable operation.

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