Residual Current Circuit Breaker (RCCB) ETI EFI-P4 AC 40 A / 0.1 A

The ETI EFI-P4 AC residual current circuit breaker rated 40 A with 0.1 A (100 mA) residual current sensitivity is designed to detect imbalance between live and neutral conductors and automatically disconnect the electrical supply. Suitable for residential and light commercial installations, this RCCB provides ground fault protection for circuits and connected equipment. It responds to AC-type leakage currents and is intended to reduce the risk of electric shock and fire caused by insulation failures or earth faults.

Advantages

The EFI-P4 AC 40 A / 0.1 A combines straightforward operation with clear fault detection, offering rapid disconnection when residual currents exceed the specified threshold. Its compact design fits standard distribution boards and it is compatible with typical single-phase circuit wiring. The device is manufactured for reliable performance in household and small business environments where AC-type residual current detection is required.

Suitable for

• Residential distribution boards for protection of lighting and socket circuits
• Small commercial premises requiring earth-fault protection
• Protection of appliances and fixed wiring from insulation faults
• Circuits where AC-type residual current detection (non-pulsating) is sufficient

Key specifications

• Rated current: 40 A
• Residual current sensitivity: 0.1 A (100 mA)
• Tripping characteristic: AC-type residual current detection
• Operation: automatic disconnection on residual current exceedance
• Mounting: DIN-rail compatible, suitable for standard distribution panels

How to use

Install the RCCB in the distribution board on the DIN rail and connect the live and neutral conductors according to wiring regulations and local codes. Ensure correct orientation and secure terminal connections to the rated torque. After installation, test the device using the built-in test button or a suitable external tester to verify tripping at the required sensitivity. Commission the protected circuit only after confirming correct operation and that upstream protection and isolation are in place.

Usage recommendations

Use the device for AC-type leakage protection in accordance with national electrical standards. Regularly test the RCCB at intervals recommended by local regulations or every few months to ensure proper functioning. Do not use this AC-type device where pulsating DC-sensitive detection is required; select a suitable type if electronic equipment or residual pulsating currents are present.