The Schneider Electric A9DE3710 is an Acti9 iCV40 residual-current circuit breaker with overcurrent protection (RCBO) — 3 poles plus neutral, rated 10 A with a C-curve magnetic trip (5–10 x In) and integrated 30 mA earth-leakage protection.
The 10 A rated current (In) and C-curve (magnetic trip 5–10 x In) mean this RCBO will hold a 10 A continuous load and trip magnetically between 50 A and 100 A on short-circuit — typical for general-purpose socket-outlet circuits or small fixed equipment. The 30 mA earth-leakage sensitivity provides personal protection against direct contact; it's the standard threshold for final circuits in residential and commercial installations per IEC 60364.
DIN-rail integration notes
The device is 90 mm wide (10 x 9 mm pitches), 93 mm tall, 73 mm deep — fits a standard modular enclosure. Neutral is on the left; connection pitch is 18 mm between phases and 9 mm between phase and neutral. Tunnel terminals accept 1–16 mm² rigid or 1–10 mm² flexible cable; strip length 14 mm, tightening torque 2 N·m. IP20 on the body, IP40 inside the modular enclosure.