Schneider Electric A9R50440 Residual current circuit breaker (RCCB), iID K, 4P, 40A, AC type, 30mA. The Schneider Electric A9R50440 is a robust 4-pole Residual Current Circuit Breaker (RCCB) from the Acti9 iID K series, specifically designed for critical earth-leakage protection. This device, with a rated current of 40A and an earth-leakage sensitivity of 30mA, provides instantaneous AC type protection, crucial for both personnel safety and equipment integrity. Engineered to operate reliably on 380-415V AC 50/60 Hz networks, it is perfectly suited for the electrical infrastructure prevalent across Egypt and the Gulf region. Its voltage-independent residual current tripping technology ensures consistent performance. With convenient clip-on 35mm DIN rail mounting and tunnel-type terminals accommodating rigid cables up to 35 mm², installation is straightforward. This RCCB finds widespread application in diverse industries such as oil and gas, water treatment plants, cement production, food and beverage processing, textiles, and various building services, ensuring compliance with EN/IEC 61008-1 and EN/IEC 61008-2-1 standards. For reliable electrical safety in demanding environments, the Schneider Electric A9R50440 offers an essential solution.