It includes phase failure detection, so it will trip on loss of a phase — a common failure mode that can single-phase a motor and cause overheating. The interrupting capacity is 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V.
Motor protection design and auxiliary switch complement
That alarm contact is useful for remote fault annunciation in a PLC or SCADA system.
The 86 mm depth leaves clearance for wiring and busbar connections in a typical 200 mm deep enclosure.
Thermal performance and power loss
Maximum power loss is 4 W, so heat dissipation in the enclosure is low.