The Schneider Electric A9N21363 is a Prodis DT40N miniature circuit breaker with 1 protected pole plus switched neutral, rated 4 A with a C-curve trip characteristic (magnetic tripping between 5 and 10 times In). Rated for AC distribution at 50 Hz, it carries a dual-standard breaking capacity: 6 kA Icn at 230 V AC per EN/IEC 60898-1 for domestic-type installation coordination, and 10 kA Icu at 230…240 V AC per IEC 60947-2 for industrial panel duty. Pollution degree 3 (IEC 60947-2) and overvoltage category IV suit it for main-distribution positions in enclosures where conductive contamination is possible and the breaker sees direct utility connection.
Terminals, environment, and lifecycle
Tunnel-type terminals accept flexible cable from 0.33 to 10 mm² and rigid from 0.75 to 16 mm², with a 2 N·m tightening torque and 13 mm strip length. The breaker is rated IP20 (finger-safe terminals), tropicalised to class 2 per IEC 60068-1, and operates at altitudes up to 2000 m and 95 % relative humidity at 55 °C.
Sourcing and documentation
The part carries NF quality label and complies with EN/IEC 60898-1 and EN/IEC 60947-2. Separate earth-leakage protection block can be added if needed.