The A9F87240 is a 40‑ampere, double‑pole (2P) miniature circuit breaker from Schneider Electric’s Acti9 iC60H series, equipped with a C‑curve tripping characteristic (magnetic trip set at 8 × In). The C‑curve delivers an optimal balance between overload protection and tolerance of moderate inrush currents, making it an ideal solution for general‑purpose distribution applications – including lighting circuits, power sockets, small motor feeders, and control panels – in commercial, industrial, and residential settings. With both poles protected, this 2‑pole device ensures simultaneous disconnection of both lines in single‑phase AC systems or DC applications, significantly enhancing safety and isolation integrity. This MCB offers a robust ultimate breaking capacity of 30 kA at 220‑240 V AC per the industrial standard EN/IEC 60947‑2, and 10 kA at 400 V AC under the residential norm EN/IEC 60898‑1, guaranteeing reliable fault interruption across diverse and demanding environments. Certified to both standards, it provides seamless integration into mixed‑use projects. Designed with Class‑2 insulation for superior operator protection, the breaker also coordinates fully with Acti 9 RCDs and Compact NSX MCCBs, simplifying system architecture. The device features the intuitive VisiTrip fault‑finder window, which instantly identifies the tripped pole to shorten diagnostic time, and the VisiSafe green strip that delivers undeniable visual confirmation of contact opening – a critical safety check for maintenance personnel. Its quick‑make/quick‑break mechanism, independent of handle position, ensures consistent performance over 10,000 electrical and 20,000 mechanical cycles. Despite its 40 A capacity, the breaker maintains a compact 36 mm width (4 modular pitches) and clips onto DIN rails, saving valuable panel space. The terminals are engineered for heavy‑duty wiring, accepting rigid conductors up to 35 mm² and flexible up to 25 mm² with a 3.5 N·m tightening torque. The device offers IP20 protection at the terminals and IP40 when enclosed, operates reliably 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 41 kg CO₂ eq. – all reflecting Schneider Electric’s commitment to sustainable and safe energy distribution.
