The Schneider Electric A9N16240 is a 2-pole residual current circuit breaker (RCCB) from the Acti9 xID range, rated 63 A with 30 mA earth-leakage sensitivity.
Earth-leakage protection class and what it means
The A9N16240 carries a Type A-SI (Super Immunised) earth-leakage protection class. This makes it suitable for circuits feeding electronic loads where a standard Type A would trip falsely. The 30 mA sensitivity is the standard for personal protection against indirect contact (IEC 60364). Instantaneous trip time means no intentional delay — it clears the fault as soon as the residual current exceeds 30 mA.
Tunnel terminals accept 1-35 mm² rigid or 1-25 mm² flexible cable; strip length 14 mm, tighten to 3.5 N·m. IP20 rated — intended for enclosed distribution boards, not wet or dusty environments. Local signalling shows ON, OFF, and fault-trip status. A padlocking device can lock the toggle in the OFF position for isolation during maintenance — the part is marked suitable for isolation.
