Schneider Electric Circuit Breaker A9R21440

Schneider Electric Circuit Breaker A9R21440

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The Schneider Electric A9R21440 is a 4‑pole residual‑current circuit breaker (RCCB) from the Acti 9 iID series, rated for 40 A with 30 mA earth‑leakage sensitivity (Type A). It operates on 380–415 V AC (50/60 Hz) networks, mounts on a DIN rail, and trips instantly on leakage or fault, providing protection against electric shock and fire hazards due to earth faults.