A solid state relay (SSR) is an electronic switching device that is used to control the flow of electrical current in a circuit. It consists of a solid-state switch and a control circuit, and it is capable of switching AC or DC current with high accuracy and reliability.

This solid state relay is a DC-AC SSR, which means that it is designed to switch AC current using a DC control signal. It has a current rating of 25A, which means that it is capable of switching currents up to 25A. It is designed to be controlled by a DC voltage in the range of 3-32V, and it is capable of switching AC voltage up to 220V.

Solid state relays are often used in a variety of applications where it is necessary to switch AC or DC current with high accuracy and reliability, including industrial control systems, HVAC systems, and more. They are a convenient and easy-to-use solution for controlling electrical current in a circuit, and they are often preferred over mechanical relays due to their fast switching speed and long service life.

Control high-voltage AC devices directly with this solid state relay. This relay can be controlled with an Arduino or PID controller and, can handle a load up to 25A at 220V.