It is not a circuit breaker — there is no overload or short-circuit trip mechanism built in.
Undervoltage release and control wiring
The UVR does not have a leading contact, so sequence timing for downstream contactors needs to be handled externally. The disconnect also accepts an optional motor drive for remote operation, though no auxiliary contacts are included on this variant.
The 3VA1225-1AA42-0BA0 occupies a 140 mm wide, 158 mm tall, 70 mm deep footprint. Main circuit connections are busbar-type front terminals.