Residual-current circuit breaker Legrand 2P 10A C 0.03A type AC (MPN 411011)

Legrand residual-current circuit breaker 2P 10A C 0.03A type AC is a combined protective device that integrates residual-current detection and overcurrent protection in a compact two-pole module. Designed for installation in distribution boards, this device monitors imbalance between live and neutral conductors and trips the circuit at leakage currents of 30 mA, while also providing short-circuit and overload protection with a C-type trip characteristic and a rated current of 10 A.

Advantages

This Legrand unit provides coordinated protection against earth leakage and overcurrent within a single compact enclosure, simplifying wiring and saving space in consumer units. The device’s 30 mA sensitivity offers reliable protection against indirect contact and reduces fire risk resulting from insulation faults, while the C characteristic ensures selective tripping for general-purpose circuits with moderate inrush currents. Built to standard mounting and connection dimensions, it fits common DIN-rail panels and is suitable for residential and light commercial electrical installations.

Suitable for

• Protection of lighting and socket circuits in homes and apartments
• Small commercial and office circuits requiring earth-leakage protection
• Distribution boards where combined RCD and overcurrent protection reduces module count
• Replacement or retrofit in existing DIN-rail consumer units with compatible connection schemes

Key specifications

• Poles: 2-pole (protects live and neutral conductors)
• Rated current: 10 A
• Tripping characteristic: C-type magnetic curve
• Residual operating current: 0.03 A (30 mA), AC type
• Function: Combined residual-current device (RCD) and overcurrent protection
• Mounting: DIN-rail compatible two-module width (standard housing)

How to use

Install the device on a standard 35 mm DIN rail inside the distribution board following local electrical regulations. Connect the incoming supply conductors to the line terminals and the outgoing circuit conductors to the load terminals, ensuring correct polarity for live and neutral. Verify the terminal screws are tightened to the manufacturer’s recommended torque and that the device is accessible for testing. After installation, test the residual-current function using the built-in test button or a qualified RCD tester to confirm proper operation before placing the circuit into regular service.

Usage recommendations

Use this 30 mA AC-type device in circuits where detection of sinusoidal AC leakage currents is expected. For circuits supplying equipment with electronic components that can generate residual DC components, consider an RCD with appropriate type (A or B) to ensure consistent tripping. Periodically test the device (at least every 6 months) using the test button to confirm continued functionality and consult national wiring rules for appropriate placement and discrimination with upstream protective devices.