The Kopp RCD 40-0,03 is a double pole miniature circuit breaker with built-in residual current protection, suitable for interior use in consumer units and distribution boards. With a maximum amperage of 40A and an operating temperature of 40°C, it provides overload, short circuit, and overcurrent protection. The switch control style allows for easy ON/OFF operation, and the DIN rail mounting style ensures secure installation. This German-made device offers reliable earth leakage protection and has a breaking capacity of 10kA, making it ideal for both commercial and industrial applications.