Circuit breaker comprising a passively heated bimetal element acting on a magnetic yoke of an electromagnetic tripping device

A circuit breaker, comprising:

• a first terminal contact and a second terminal contact. the first and second terminal contacts being electrically connected within the circuit breaker via a switching contact;
• an electromagnetic tripping device configured to act on the switching contact or on a lever system connected to the switching contact, a coil of the electromagnetic tripping device being connected between the first and second terminal contacts;
• a bimetal element configured to act on the switching contact or on the lever system,
• wherein an electrical connection between the first and second terminal contacts bypasses the bimetal element,
• wherein the bimetal element thermally coupled to the electromagnetic tripping device,
• wherein the bimetal element is configured to act on the switching contact indirectly via an iron circuit or magnetic yoke of the electromagnetic tripping device, and
• wherein the bimetal element is inserted into the iron circuit or magnetic yoke of the electromagnetic tripping device such that a magnetic flux through the iron circuit/magnetic yoke in a first position of the bimetal element at a first temperature is less than the magnetic flux through the iron circuit/magnetic yoke in a second position of the bimetal element at a second temperature.