The UVR ensures the breaker drops out on loss of control voltage — a standard requirement for safety circuits on conveyors, pumps, and compressors where automatic restart after a power dip is unacceptable. The auxiliary switch complement (2 form-C contacts) is enough to report breaker status back to a PLC or to drive a local pilot light without adding external relays.
Breaking capacity across voltage levels — selectivity planning
The interrupting ratings step down cleanly with voltage: 187 kA at 240 V, 121 kA at both 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. For a 415 V panel, the 121 kA figure means this breaker can be used downstream of a transformer or main breaker with a similar or higher SCCR without worrying about cascaded failure — it clears a bolted fault within its own rating. At 690 V the 3.7 kA limit is low; that voltage level typically appears in mining or marine systems, and this breaker would need upstream current limitation or a higher-rated device for those installations.