The A9F74270 is a 0.5‑ampere, double‑pole (2P) miniature circuit breaker from Schneider Electric’s Acti9 iC60N series, featuring a C‑curve tripping characteristic (magnetic threshold at 8 × In). This ultra‑low‑current device is specifically engineered for the most sensitive electrical circuits – such as control transformers, instrumentation, signal lines, electronic power supplies, and PLC input/output modules – where even minor overcurrents can damage delicate components and where standard‑rated breakers offer inadequate protection. As a 2‑pole breaker with both poles protected, it ensures simultaneous disconnection of both lines in single‑phase AC systems or DC applications, providing enhanced safety and isolation integrity – particularly critical in sensitive instrumentation and control panels. What truly distinguishes this model is its extraordinary ultimate breaking capacity: rated at 50 kA at 380‑415 V AC under the industrial EN/IEC 60947‑2 standard, and 6 kA at 400 V AC per the residential EN/IEC 60898‑1 norm, ensuring reliable fault interruption even in high‑fault‑current environments. Certified to both standards, it offers flexible integration into industrial automation panels, commercial control cabinets, and specialised residential metering systems. Designed with Class‑2 insulation for superior operator protection, the breaker also coordinates fully with Acti 9 RCDs and Compact NSX MCCBs, simplifying system design. The device incorporates the proven VisiTrip fault indicator, which instantly highlights the tripped pole for rapid diagnosis, and the VisiSafe green strip that delivers unmistakable visual confirmation of contact opening – a vital safety check for maintenance personnel. Its quick‑make/quick‑break mechanism, independent of toggle position, guarantees consistent performance over 10,000 electrical and 20,000 mechanical cycles. With a compact 36 mm width (4 modular pitches) and DIN‑rail clip‑on mounting, it saves valuable 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, and the device offers IP20 terminal protection and IP40 when enclosed. Operating reliably from -35 °C to +70 °C, it is built with halogen‑free plastics and PVC‑free materials, achieving a 54% recyclability rate and a total lifecycle carbon footprint of 27 kg CO₂ eq. – all reflecting Schneider Electric’s commitment to sustainable, precise energy management.
