The Hager miniature circuit breaker detects overcurrents due to both overload and fault currents. The MTN range are Type B breakers. This means they will trip between 3 and 5 times at full load, which is suitable for most domestic installations. The Miniature Circuit Board will operate and interrupt the supply to prevent damage to the installation. The short-circuit breaking capacity of the Hager MTN Domestic miniature circuit breakers is 6 kA. The current carrying capacity of the cable should always exceed the current rating of the miniature circuit breaker to prevent damage.