Its 6 kA breaking capacity — certified per both EN 60898 and IEC 60947-2 — is the fault current it can safely interrupt without upstream cascading; at 400/440 V AC multi-phase, this covers standard domestic and light commercial service-entrance fault levels.
The 76 mm depth leaves clearance for standard enclosure depths; 70 mm installation depth accounts for the rail clip and rear arc chamber. Sealable terminals (tamper-evident cover available) support utility-metering or rental applications where unauthorized access must be prevented.