Legrand P312 Residual Current Circuit Breaker with Overcurrent Protection, 2P, 20A, C-Curve, 30mA, Type AC

The Legrand P312 is a high-quality 2-pole residual current circuit breaker with overcurrent protection (RCBO), engineered to provide comprehensive safety for electrical circuits. This device integrates both short-circuit and overload protection with earth leakage detection in a single compact unit, ensuring reliable performance in various electrical systems. With a rated current of 20A and a C-type tripping characteristic, it is designed to handle standard inductive loads while maintaining precise sensitivity to leakage currents.

Advantages

This RCBO offers a significant space-saving advantage by combining two essential protective functions into one modular device, simplifying installation within distribution boards. Its robust construction ensures long-term operational reliability, while the AC type sensitivity provides effective protection against residual sinusoidal alternating currents. The C-curve characteristic makes it particularly suitable for circuits with moderate inrush currents, preventing nuisance tripping during normal operation of household or office appliances.

Suitable for

• Residential electrical distribution boards
• Commercial office lighting and power circuits
• Protection of individual final circuits
• General purpose electrical installations

When it may not be suitable

This device is not intended for use in DC-sensitive applications or circuits where high-frequency leakage currents are present, as it is specifically designed as a Type AC breaker. It should not be installed in environments exceeding its specified operating temperature range or in locations with extreme humidity without appropriate protective enclosures.

Key specifications

• Number of poles: 2P
• Rated current: 20A
• Tripping characteristic: C-curve
• Sensitivity: 30mA
• Type: AC

How to use

The Legrand P312 should be installed by a qualified electrician in accordance with local electrical regulations. It is designed for mounting on a standard DIN rail within a consumer unit or distribution board. Ensure that the supply cables are correctly terminated at the input terminals and that the load circuits are connected to the output terminals, maintaining proper polarity and torque settings as specified by the manufacturer.

What to consider before purchase

• Verify that the 20A rating matches the requirements of your specific circuit load.
• Ensure the 30mA sensitivity is appropriate for the intended level of personnel or equipment protection.
• Confirm that the installation space allows for a 2-pole modular device.
• Check that the Type AC classification meets the safety standards required for your specific application.

Usage recommendations

Regularly test the device using the integrated test button to ensure the mechanical tripping mechanism remains functional. It is recommended to perform this check at least every six months to maintain optimal safety standards.