Its breaking capacity of 4500 A at 230/400 V AC (50/60 Hz) per IEC 60898-1 is suited for domestic and small commercial panels where fault currents stay within that range; for higher prospective fault levels you would step up to a 6 kA or 10 kA rated MCB. Clip-on DIN rail mounting (18 mm width, 1P modular) means it drops straight into a standard distribution board without extra hardware — no need to gut the whole panel to swap it in.
Lifecycle reality — obsolete, but still sourceable
No need to redesign the board yet if you just need a spare to keep the line running.
Rated current 10 A: this MCB protects a circuit whose continuous load does not exceed 10 A. Pair it with cable sized for that current and a downstream load that stays under the threshold. C curve: trips magnetically between 5× and 10× In (50–100 A for this 10 A unit). That gives enough headroom to avoid nuisance trips from motor inrush or capacitor charging, while still clearing a hard short fast. If your installation's prospective short-circuit current exceeds 4500 A, this breaker is not the right fit — you would need a higher-rated model. Electrical durability of 20,000 cycles under load and mechanical durability of 10,000 cycles — typical for a domestic-grade MCB; not designed for frequent switching duty like a contactor, but fine for protection in a distribution board that sees occasional operation.