The A9F55101 is a 1‑ampere, single‑pole miniature circuit breaker from Schneider Electric’s Acti9 iC60H series, configured with a D‑curve tripping characteristic (magnetic threshold at 12 × In). This D‑curve design is specifically engineered for circuits that draw heavy inrush currents – such as small motor starters, solenoid valves, transformer primaries, and capacitive loads – where lower‑curve breakers would be prone to nuisance tripping. Despite its modest 1 A rating, this MCB delivers an outstanding ultimate breaking capacity of up to 70 kA at 220‑240 V AC under the EN/IEC 60947‑2 industrial standard (with detailed derating across voltage ranges), and 10 kA at 240 V AC per the EN/IEC 60898‑1 residential norm, ensuring reliable fault clearing even in high‑fault‑current environments. It complies with both standards, offering seamless integration across industrial control panels, commercial distribution boards, and residential consumer units. The device incorporates the well‑known VisiTrip fault‑finder window, which visually highlights the tripped pole to shorten troubleshooting time, and the VisiSafe green strip that provides unmistakable visual proof of contact separation – a critical safety feature for downstream maintenance. Its fast‑make/quick‑break mechanism, independent of the toggle handle, guarantees consistent switching performance over 10,000 electrical and 20,000 mechanical cycles. With a compact 18 mm width (2 modular pitches) and DIN‑rail clip‑on mounting, it optimises panel space. The double‑tunnel terminals accept rigid conductors up to 25 mm² and flexible up to 16 mm², with a 2 N·m torque. The device offers IP20 protection at the terminals, operates from -35 °C to +70 °C, and is built with halogen‑free plastics, PVC‑free construction, and a 54% recyclability rate, with a total lifecycle carbon footprint of 14 kg CO₂ eq. – all transparently disclosed in line with Schneider Electric’s environmental commitments.
