The SSR-30028ZD3B with Relay is a solid state relay manufactured by QLT Power. It can be used for a wide range of applications, such as controlling heating elements, large motors, pumps, and other industrial machinery. It has a control voltage range of 3-32VDC, making it suitable for a variety of systems. The relay can handle up to 300A of current, and has an input voltage range of 24-280VAC. It is designed for a long operating life and is protected against interference, temperature, and vibrations. It has a series of SSR-Z and is UL approved.