The Schneider Electric A9F08170 is a 1-pole Acti9 iC60H miniature circuit breaker rated at 0.5 A with a D tripping curve. The 70 kA Icu at 220…240 V AC (per EN/IEC 60947-2) gives real fault-current headroom in a panel fed by a large transformer, and the 10 kA Icn at 230 V AC (per EN/IEC 60898-1) covers the residential and light commercial coordination requirement.
The iC60H carries a 70 kA Icu rating at 240 V AC under EN/IEC 60947-2, which is the industrial standard for panelboards and motor control centers. For downstream coordination, the limitation class is 3 per EN/IEC 60898-1, so it restricts let-through energy enough to allow standard downstream MCBs to hold their selectivity under most fault conditions. The 20 kA Icu at 12…60 V DC and 15 kA Icu at 60…72 V DC cover DC control circuits or battery-backed loads, though the 0.5 A rating limits the practical DC load to signal-level or small relay coils.
Mounts on a DIN rail, 18 mm wide (2 modules). The double terminals top and bottom accept 1…25 mm² rigid or 1…16 mm² flexible copper — enough for a 0.5 A circuit's feed and load in standard panel wire. The toggle has a trip-indicator window that shows a red flag when the breaker has tripped on overload or short circuit, which saves a multimeter check during commissioning or troubleshooting. Pollution degree 3 (conforming to EN/IEC 60947-2) means it's rated for the conductive-dust and humidity conditions typical of industrial control panels, not just clean residential switchgear.