Legrand DX3 P312 RCBO 2P 25A C 30mA Type AC

The Legrand DX3 P312 RCBO is a high-quality 2-pole residual current circuit breaker with integrated overcurrent protection, engineered to ensure safety in electrical distribution systems. This device combines the functions of a miniature circuit breaker and a residual current device in a single compact unit, effectively monitoring for both overloads and earth leakage faults. With a 25A current rating and a C-curve tripping characteristic, it is designed to handle standard inductive loads while providing rapid disconnection in the event of a fault, making it a reliable choice for modern electrical installations.

Advantages

The primary advantage of the Legrand DX3 P312 RCBO is its space-saving design, which integrates two essential safety functions into one modular component, simplifying installation and reducing the space required in the distribution board. It offers robust protection against short circuits and overloads, while the 30mA sensitivity ensures high-level protection against electric shock for personnel. The Type AC classification makes it suitable for general-purpose AC circuits, providing consistent performance and durability in both residential and commercial environments.

Suitable for

• Residential electrical distribution boards
• Commercial office lighting and power circuits
• Protection of final circuits against earth leakage
• General-purpose electrical installations requiring overload and short-circuit protection

When it may not be suitable

This device is not suitable for circuits where DC components or pulsating DC currents are present, as it is a Type AC device. For applications involving electronic equipment with power electronics, such as variable speed drives or certain LED lighting controllers, a Type A or Type B residual current device may be required instead.

Key specifications

• Number of poles: 2P
• Rated current: 25A
• Tripping characteristic: C-curve
• Residual current sensitivity: 30mA
• Type: AC

How to use

The Legrand DX3 P312 RCBO is designed for mounting on a standard DIN rail within an electrical distribution enclosure. Installation should be performed by a qualified electrician in accordance with local electrical regulations. The device features clear terminal markings for phase and neutral connections. Once installed, the integrated test button should be pressed periodically to verify the mechanical operation of the tripping mechanism and ensure ongoing safety.

What to consider before purchase

• Verify that the 25A rating matches the load requirements of the circuit
• Ensure the installation environment is compatible with Type AC devices
• Check the available space on the DIN rail within your distribution board
• Confirm that the C-curve characteristic is appropriate for the connected equipment

Usage recommendations

Regular maintenance and testing are essential for the continued reliability of the RCBO. It is recommended to perform a functional test using the test button at least every six months to ensure the device remains responsive to leakage currents.