Based on this product's specifications, here are some alternatives and similar models
Eaton U-PKZ0 Undervoltage Release, 230V 50Hz
Summary description:
The Eaton U-PKZ0 is an undervoltage release designed for PKZ motor-protective circuit breakers. Operating at 230V 50Hz, this accessory ensures safety by automatically tripping the circuit breaker when the supply voltage drops below a specified threshold. It is a reliable component for industrial and commercial electrical systems, providing essential protection against voltage fluctuations and power loss.