Rated current, A: 200 Rated current of the thermal release, A: 120 Overall dimensions, mm: 400x210x110 Degree of protection: Ip 20 Out of production. Reliable, inexpensive switch, domestic manufacturer. Designed to protect electrical installations from unacceptable overloads and short-circuit currents, as well as for infrequent commutation under normal operating conditions. According to the principle of operation, an automatic air switch (machine) is a primary direct-acting relay. In principle, the air circuit breaker is a primary direct acting relay. Depending on the version, the machine can be equipped with one or several types of releases. The contact system of the machines is equipped with arcing chambers and is designed to cut off sufficiently large currents. Open circuit breakers should be installed in cabinets and boxes. In damp and especially damp rooms, machines of a protected design must be used.