Electric circuit breaker

An electric circuit breaker, including:

• an electrical conductor comprising a first terminal and a second terminal;
• a switch configured to separate the first terminal from the second terminal when the switch is tripped in response to a current cutoff order;
• an arc extinguishing chamber delimited by a body of the electric circuit breaker, the arc extinguishing chamber being configured to receive, after the switch is tripped, a portion of the electrical conductor separated at least from the first terminal or the second terminal;
• a fuse configured to be electrically connected between the first and second terminals after the switch is tripped;
• wherein the electric circuit breaker includes a connection device comprising a gate configured to be broken after the switch is tripped only when at least one of a temperature, or a pressure inside the arc extinguishing chamber, or an intensity of an electrical arc present in the arc extinguishing chamber surpass their respective predefined tripping thresholds, the connection device being configured to connect an electrode of the fuse to one of the terminals of the electrical conductor only once the gate is broken.