CWU24125P

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CWU24125P Application Field and Working Principle

Solid State Relays (SSRs) are switching relays that construct switches using semiconductor components as the switching element in place of electromechanical relays. They allow for various advantages over EM relays, including small size, high reliability, and high switching speed, making them an important technology in modern industries. The CWU24125P is a particular model of SSR used for general-purpose applications, with a wide range of benefits for its users.

Application Field

The CWU24125P is a DC/AC output SSR, meaning it has a DC input side and an AC output side. It is a three-phase SSR with 25 Amp rated input current and 50mA turn-on/turn-off current, a 4A inrush current limit, and a thermal load rating of 16A. In any two contact performance, it is rated with a 35V drop voltage at 25A AC1 resistance and with a 28V drop voltage at 16A AC1 resistance. This means that performance-wise, the CWU24125P is suitable for supporting three-phase induction motors, rectifiers, electromechanical relays, drive systems, electromotive machines, power supplies, switch electric heaters, such as hot plates.

Due to its variety of features, such as wide and stable hysteresis band, forced air cooling, fast response time, and overload protection, the CWU24125P is ideal for application in automated industrial control systems, food and medical equipment, communication and consumer electronics. It is easy to configure and you can choose to either manually control it with a switch, or automate its functioning using a PLC. With its a wide working temperature range from -40 to 60 degrees Celsius, the CWU24125P can be used safely and reliably in climates of different temperatures.

Working Principle

The CWU24125P uses a Triac as its switching element, which is constructed by connecting three diodes in a reverse-parallel configuration between two terminals. The role of the Triac is to control power flow through the SSR. An optical isolator device is used in the CWU24125P to react to the change in voltage on the DC input side, which prevents the wrong electrical signals from reaching the load. When there is no signal connected to the DC input side, two contacts in the CWU24125P remain close, which prevents power from reaching the load. When a signal is sent to the DC input side, the voltage changes, causing the optical isolator to open the two contacts, thus allowing power to reach the load.

In the CWU24125P, the Triac remains in an off-state when no control signal is applied, and is moved into an on-state when the control signal is applied. This allows power to flow through the load and the Triac acts as a switch, turning on and off in response to the frequency of the AC input signal. This enables the CWU24125P to control AC power loads from the relatively low-voltage DC signal it receives.

In addition, the CWU24125P is equipped with a temperature control function which prevents the Triac from being damaged by heat. It can limit the temperature of the Triac by cutting off the output when the temperature rises beyond a certain threshold. This temperature control feature in particular makes the CWU24125P well-suited for demanding applications, as it improves its reliability and allows it to be used safely and effectively in hot climates.

All in all, the CWU24125P is a solid-state relay with a wide range of advantageous features, making it a suitable choice for various kinds of applications, especially in automated industrial control systems and communication equipment. With its fast response time, wide working temperature range, overload protection, and temperature control features, it has become a popular choice for demanding applications that require both performance and reliability.

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