The Schneider Electric A9N16327 is a 4-pole (4P) Residual Current Circuit Breaker (RCCB) from the Acti9 xID range, rated at 63 A with a 30 mA earth-leakage sensitivity. It operates on a 400-415 V AC network at 50 Hz, providing instantaneous earth-leakage protection. The SI suffix indicates higher immunity to high-frequency leakage that can plague modern industrial panels. The unit is suitable for isolation, with a visible contact position indicator and a padlocking option for lockout/tagout procedures.
Clip-on mounting to a DIN rail, 72 mm wide by 81 mm high by 75 mm deep — occupies 8 modules of 9 mm pitch. Neutral is on the left, phase connections on the right, with an 18 mm pitch between phases. Tunnel terminals accept 1-35 mm² rigid or 1-25 mm² flexible copper; wire strip length is 14 mm, and tightening torque is 3.5 N.m on top or bottom connections. IP20 rated — suitable for enclosure installation, not for wet or washdown environments. Pollution degree 2 (non-condensing, typical for a clean panel).