Auxiliary side contacts for MC-9b-150a UA-1 1a1b UA-1 1A1B

Auxiliary contacts for MC-9b-150a circuit breakers – expanding functionality

Auxiliary side contacts UA-1 1A1B are dedicated accessories for MC-9b-150a circuit breakers, allowing you to increase their functionality and adapt them to the specific needs of the installation. They enable the implementation of additional control and signaling circuits, which is particularly useful in more complex systems.

Construction and application

These auxiliary contacts are mounted sideways to the circuit breaker, providing a compact solution and not requiring additional space in the switchgear cabinet. The 1a1b construction means one normally open (NO) contact and one normally closed (NC) contact, providing flexibility in circuit configuration. They are ideal for applications requiring circuit breaker status signaling or remote control of other devices.

Safety and protection

UA-1 1A1B contacts ensure safe and reliable operation in combination with MC-9b-150a circuit breakers. The IP20 degree of protection means protection against accidental contact and against the ingress of solid objects larger than 12.5 mm – a standard for devices mounted inside distribution boards. It should be remembered that these contacts are not designed to operate in conditions of increased humidity or dust.