The Schneider Electric A9F07140 is a 40 A, 1-pole miniature circuit-breaker from the Acti9 iC60H series, designed for distribution boards and sub-distribution panels. Rated for both AC and DC networks (50/60 Hz), this MCB carries a dual-standard certification: EN/IEC 60947-2 for industrial circuit-breaker performance and EN/IEC 60898-1 for household-type protection. That means it qualifies as a circuit-breaker for isolation (suitability for isolation marked on the device) and meets pollution degree 3, overvoltage category IV — suitable for main incoming panels, not just final subcircuits.
The headline breaking capacity is 42 kA Icu at 12-60 V AC (EN/IEC 60947-2). At 220-240 V AC it drops to 15 kA Icu, and at 230 V AC the Icn per IEC 60898-1 is 10,000 A. For DC applications, it offers 20 kA Icu at 12-60 V DC and 15 kA Icu at 60-72 V DC. For 230/400 V distribution, the 10 kA Icn is standard for final circuits; the 15 kA Icu gives headroom if you need to coordinate with a higher-rated upstream device.
Snaps onto a DIN rail (mounting support: DIN rail). Width is 18 mm (2 x 9 mm pitches), so it occupies one standard module position. Height 91 mm, depth 78.5 mm — fits standard distribution enclosures with 80-100 mm gutter depth. Terminals accept 1-35 mm² rigid or 1-25 mm² flexible conductors on double terminals (top and bottom). Tightening torque 3.5 N.m. Wire stripping length 14 mm. IP20 finger-safe protection on the front face.
Durability and environmental ratings
Rated for 10,000 electrical cycles and 20,000 mechanical cycles. Colour: white (standard for Acti9 residential/commercial range).