In this category you will find a wide range of circuit breakers ( circuit Breakers) of the best brands such as Bticino, ABB, Eaton, Hager, Schneider and Siemens at discounted rates on our online price list. What is a magneto-thermic ?? A circuit breaker is a safety device able to stop the flow of electric current in an electric circuit in case of overcurrent. The latter can be caused by a malfunction, and we talk about overcurrent, or a fault (when you touch the phase and neutral), and we speak of a short circuit. In our online catalogue you will find a wide range of circuit breakers, a differential of sizes ranging from 6A up to 125A, with trip curves B, C and D, and the power outage that varies from 4.5 KA up to 20 KA.