The A9F77220 is a 20‑ampere, double‑pole (2P) miniature circuit breaker from Schneider Electric’s Acti9 iC60N series, equipped with a C‑curve tripping characteristic (magnetic trip set at 8 × In). This C‑curve offers a balanced response between overload protection and tolerance of moderate inrush currents, making it a reliable choice for general‑purpose distribution – including lighting, power outlets, small motor feeders, and control circuits in commercial, industrial, and residential environments. As a 2‑pole device with both poles protected, it guarantees simultaneous disconnection of both lines in single‑phase AC systems or DC applications, substantially improving safety and isolation performance. This MCB provides a rated ultimate breaking capacity of 20 kA at 220‑240 V AC under the industrial standard EN/IEC 60947‑2, and 6 kA at 400 V AC per the residential norm EN/IEC 60898‑1, ensuring reliable fault interruption in a wide variety of installations. Certified to both standards, it integrates seamlessly into mixed‑use projects. Designed with Class‑2 insulation for enhanced operator protection, the breaker coordinates fully with Acti 9 RCDs and Compact NSX MCCBs, streamlining system architecture. The device features the intuitive VisiTrip fault‑finder window, which instantly identifies the tripped pole to reduce downtime, and the VisiSafe green strip that delivers undeniable visual proof of contact opening – a critical safety check for maintenance crews. Its quick‑make/quick‑break mechanism, independent of toggle position, guarantees consistent switching 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 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 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 28 kg CO₂ eq. – all reflecting Schneider Electric’s commitment to safe, sustainable energy distribution.
