RZ3A40A25

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Solid state relays effectively replace traditional electromechanical relays. They have low power consumption and high switching speeds. Among them is RZ3A40A25, a three-phase solid state relay with zero-crossing turn-on and a maximum output current of 40A. This article describes the application fields and working principle of RZ3A40A25.

Application fields

RZ3A40A25 can be used in various applications including three-phase motor control, AC heater control, over-voltage protection, under-voltage protection and AC voltage control, among others. It is especially suitable for applications under the condition where the three-phase controlled equipment are interlocked. The switching-on time could be adjusted through an external resistor, ensuring fast and accurate voltage control and over-voltage protection.

Working principle

RZ3A40A25 consists of a power switch and an optoelectronic coupling control unit. A Raspberry Pi serves as the input control unit. The optoelectronic coupling control unit enables the power switch to control the load. When the Raspberry Pi receives an ON signal, the control unit triggers the power switch to turn on, activating the controlled equipment.

The optoelectronic coupling control unit contains a zero-crossing turning-on circuit. This circuit helps to increase the precision of the control and protects the controlled equipment from voltage or current-related damages. When the voltage of the external resistance reaches zero level, the power switch turns on in an instant. This feature helps RZ3A40A25 protect the controlled equipment from over-voltage and low-voltage damages.

RZ3A40A25 also features over-voltage protection. When the output voltage exceeds the rated range, the output current will drop to zero. This helps protect the load from damages related to over-voltage.

RZ3A40A25 has a wide temperature range from -45°C to 65°C. This helps the solid state relay remain stable and reliable in a variety of environmental conditions.

In summary, RZ3A40A25 is a reliable, cost-effective, and long-lasting solid state relay which is suitable for a variety of applications, including three-phase motor control, AC heater control, over-voltage protection, under-voltage protection and AC voltage control. Its zero-crossing turn-on circuit and over-voltage protection feature greatly increase its accuracy and reliability.

The specific data is subject to PDF, and the above content is for reference