The A9F94170 is an ultra‑low‑current, single‑pole miniature circuit breaker from Schneider Electric’s Acti9 iC60L range, designed with a C‑curve tripping characteristic (magnetic trip at 8 × In) and a rated current of just 0.5 A. This MCB is purpose‑built for the most sensitive electrical circuits – including control transformers, electronic power supplies, instrumentation, signalling loops, and PLC input/output modules – where even small overcurrents can damage costly components and where standard‑rated breakers offer insufficient protection. The C‑curve provides a balanced response, tolerating harmless transient surges while ensuring rapid clearance of genuine fault currents. Despite its minimal rating, this breaker delivers a remarkable ultimate breaking capacity of 100 kA at 220‑240 V AC under the industrial EN/IEC 60947‑2 standard (with derated values for other voltages), and 15 kA at 230 V AC per the residential EN/IEC 60898‑1 norm – guaranteeing reliable fault interruption even in high‑fault‑current environments. It is certified to both standards, offering seamless integration across industrial automation panels, commercial control cabinets, and specialised residential metering systems. The device incorporates the proven VisiTrip fault indicator, which instantly highlights the tripped pole for rapid diagnosis, and the VisiSafe green strip that provides unmistakable visual confirmation of contact opening – a vital safety check for any maintenance intervention. Its quick‑make/quick‑break mechanism, independent of handle position, ensures consistent performance over 10,000 electrical and 20,000 mechanical cycles. With a compact 18 mm width (2 modular pitches) and DIN‑rail mounting, it saves valuable panel space. The double‑tunnel terminals accept conductors up to 25 mm² (rigid) and 16 mm² (flexible) with a 2 N·m torque, and the breaker offers IP20 terminal protection and IP40 when enclosed, operating reliably from -35 °C to +70 °C. Built with halogen‑free plastics and PVC‑free materials, it achieves 54% recyclability and a total lifecycle carbon footprint of 14 kg CO₂ eq.
