The document is a comprehensive technical guide on miniature circuit breakers (MCBs) and residual current devices (RCDs), detailing various types, characteristics, and specifications relevant for residential breakers. It includes information on compliance with environmental regulations such as RoHS, as well as specifics about dimensions, mounting types, and electrical endurance across different breaker series. Additionally, the document provides technical data including breaking capacities, rated currents, and type approvals for various circuit protection devices.