Based on this product's specifications, here are some alternatives and similar models
Priority relay for direct connection 230V 16A FF PR-612
Summary description:
Priority relay FF PR-612 is a device for managing power distribution with direct connection at 230 V and a rated load current of 16 A. It provides prioritized switching between circuits to ensure power is routed to the selected source or load. Suitable for installations where one supply must take precedence, such as backup power selection, load shedding, or priority feeding of critical equipment.