The A9F73104 is a 4‑ampere, single‑pole miniature circuit breaker from Schneider Electric’s Acti9 iC60N range, engineered with a B‑curve tripping characteristic (magnetic trip set at 4 × In). The B‑curve is specifically designed for circuits with minimal or negligible inrush currents – such as lighting banks, resistive heating loads, and sensitive control electronics – where precise overload protection is critical and nuisance tripping must be avoided. Despite its low current rating, this MCB delivers an exceptional ultimate breaking capacity of up to 50 kA at 220‑240 V AC under the industrial EN/IEC 60947‑2 standard, and 6 kA at 230 V AC per the residential EN/IEC 60898‑1 norm, ensuring robust fault clearance even in high‑fault‑current scenarios. It complies with both standards, offering seamless integration across industrial control panels, commercial distribution boards, and domestic consumer units. The breaker integrates the intuitive VisiTrip fault‑finder window, which visually identifies the tripped pole to accelerate troubleshooting, and the VisiSafe green strip that provides indisputable visual proof of contact separation – a critical safety feature for maintenance personnel. Its quick‑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 maximises panel space. The double‑tunnel terminals accept rigid conductors up to 25 mm² and flexible up to 16 mm², with a 2 N·m tightening torque. The device offers IP20 terminal protection and IP40 when enclosed, operates from -35 °C to +70 °C, and is built with halogen‑free plastics and PVC‑free materials, achieving a 54% recyclability rate and a total lifecycle carbon footprint of 14 kg CO₂ eq.
