Schneider Electric Residual Current Circuit Breaker with Overload Protection, 40A Current Rating, 3-Pole, 30 mA Trip A9DK1740

Schneider Electric A9DK1740 Residual Current Circuit Breaker with Overload Protection is a dedicated device engineered for the protection of electrical circuits in residential and commercial installations. Featuring a robust 3-pole design and a current rating of 40A, it ensures efficient interruption of fault currents while providing earth leakage protection sensitive to 30 mA. This device combines thermal magnetic tripping technology that responds accurately to overloads and short circuits, safeguarding wiring and connected equipment.

The product is designed for mounting on DIN rails, a standard method for panel installation, providing ease of integration and maintenance. Its moderate dimensions of 93 mm height, 90 mm width, and 73 mm depth make it suitable for compact electrical distribution boards without sacrificing performance.

Rated at 400V AC and capable of breaking currents up to 4.5 kA, this circuit breaker withstands high fault conditions while maintaining reliability. The toggle switch mechanism allows intuitive manual operation with clear ON/OFF and trip status indication. The breaker complies with international IEC and EN standards, as well as RoHS directives, ensuring it meets quality and environmental regulations.

Additional features include an impulse withstand voltage rating of 4 kV to handle transient surges and an electrical endurance of 20,000 operating cycles, which prolongs operational life. The padlockable design enhances safety by permitting lockout/tagout procedures during maintenance or emergency conditions.

This Residual Current Circuit Breaker is ideally suited for use in electrical distribution for residential buildings, protecting circuits against earth leakage and overcurrent faults. It improves safety by reducing the risk of electrical shocks and fire hazards, making it an essential component in building electrical networks.

Thermal magnetic trip unit technology provides reliable overload and short circuit protection. Toggle control with ON/OFF and trip indicator enhances usability. Designed for earth leakage protection type AC applications.

Resistance to relative humidity up to 95% at 55 °C for robust performance in varied environments. Impulse withstand voltage rating of 4 kV ensures protection against surges. Electrical endurance of 20,000 cycles for prolonged durability.

Padlockable design ensures added safety during maintenance operations. Manufactured in Spain adhering to stringent quality standards. Explore the Schneider Electric product range and other high-quality circuit breakers on EnvMart for reliable industrial and residential electrical protection solutions.