Branch circuit protection with C-curve selectivity
For a pure resistive load like a heater bank, a B-curve breaker would trip faster on a short circuit, but the C-curve gives the headroom to avoid nuisance trips on start-up.
Fault current ratings and coordination
The rated short-circuit breaking capacity Icn is 10 kA per IEC 60898-1, and the ultimate breaking capacity Icu is 6 kA per IEC 60947-2. The Icn value is the service capacity — the breaker can clear a 10 kA fault and still be usable afterward. The Icu value is the ultimate capacity: it can interrupt a 6 kA fault once, but may need replacement after. For a distribution board fed by a transformer with a prospective short-circuit current above 6 kA, an upstream fuse or MCCB must coordinate to keep the fault energy within the MCB's rating.
The housing measures 94.5 mm deep, 69 mm wide, and 89 mm tall — the 1-pole width (69 mm) occupies one module on a DIN rail. This is standard for indoor distribution boards; for wet environments, an IP54 enclosure is needed.
Sourced through independent distribution; quoted to order against the BOM quantity.