Automatons A

A

— this characteristic provides the highest sensitivity. Instantaneous tripping (due to an electromagnetic release) in such devices occurs when the rated current is exceeded by 100%, and a slower thermal release, opening the circuit for a few seconds, usually operates already with a 30% increase in current.

It makes sense to use circuit breakers with such characteristics primarily in circuits that feed extremely sensitive electronics such as Hi-End audio systems, plasma panels, etc. Theoretically, such protection can also be used for household electrical appliances with a resistive load (without coils and electric motors) — lighting systems, heating and heating equipment, low-power electronics such as alarms or “smart home” equipment, etc. However, in fact this is hardly justified: firstly, even such a load can give quite high inrush currents, leading to protection operation; secondly, the protection itself with characteristic A is usually performed in the form of difavtomatov — and they, with all their advantages, are not cheap and are not always the best choice.