Hager CDS240D Residual Current Circuit Breaker 2-Pole 40A 230V 30mA Type A QuickConnect Grey White

The Hager CDS240D Residual Current Circuit Breaker is a reliable two-pole electrical protection device designed to safeguard residential and commercial circuits against earth leakage currents. Operating at an input current of 40A and an input voltage of 230V, this circuit breaker features a 30mA sensitivity rating, making it suitable for providing effective protection against electric shock through indirect contact. Incorporating Type A protection, it reliably detects sinusoidal AC residual currents and pulsating DC residual currents, which are commonly found in modern electronic equipment. The unit is equipped with QuickConnect technology to facilitate fast and secure installation within standard electrical distribution panels. Finished in a functional grey and white color combination, it integrates seamlessly into existing switchboard layouts.

Advantages

This residual current circuit breaker utilizes advanced QuickConnect technology, which significantly reduces installation time and minimizes wiring effort in electrical distribution boards. The Type A classification ensures broad compatibility with standard household appliances and electronics that may introduce pulsating DC components. With a 30mA sensitivity threshold, the device offers a high level of personal safety by disconnecting the power supply rapidly upon detecting residual earth leakage currents. Constructed by Hager, the unit adheres to established electrical engineering standards, ensuring consistent performance and operational safety over its lifespan. The compact two-pole design allows for efficient use of rail space within standard consumer units.

Suitable for

• Residential electrical installations for bathroom and kitchen circuits
• Commercial office electrical panels requiring standard earth leakage protection
• Protection of household appliances with electronic components against electric shock
• Distribution boards in newly constructed or renovated buildings

When it may not be suitable

This device is not suitable for three-phase electrical systems, as it is strictly designed for two-pole applications. It should not be used in specialized industrial environments requiring Type B residual current protection for complex frequency converters or photovoltaic systems with continuous DC fault currents.

Key specifications

• Two-pole configuration
• 40A rated current
• 230V operating voltage
• 30mA residual operating current sensitivity
• Type A residual current protection
• QuickConnect terminal technology
• Grey and white finish

How to use

The Hager CDS240D must be installed exclusively by a qualified and licensed electrician in accordance with local and national electrical wiring regulations. The device is designed for DIN-rail mounting inside an appropriate electrical enclosure or distribution board. Conductors are connected securely using the integrated QuickConnect terminals, ensuring proper torque and contact pressure. Regular testing of the residual current mechanism should be performed via the integrated test button to verify correct operational readiness.

What to consider before purchase

• Verify that the 40A rating matches the load requirements of the specific circuit
• Confirm that a two-pole configuration is required for your installation
• Check available DIN-rail space within the existing electrical panel
• Ensure compliance with local electrical codes and safety standards

Always disconnect the main power supply before attempting any installation, maintenance, or inspection of electrical components. Perform routine manual testing of the device using the test button at least twice a year to ensure continuous functional reliability.