Residual current circuit breaker Type F EFI-4 F 40/0.03 002062529

Protection of people and installations

Residual current circuit breaker type F provides rapid power disconnection when a dangerous leakage current is detected – both for direct and indirect contact. With a sensitivity of 30 mA it effectively protects against electric shock and reduces the risk of fire caused by insulation failure. The device is intended for TN‑S, TN‑C‑S, TT and IT networks, where the neutral and protective earth are separated.

Key advantages

• Wide‑range current detection – type F detects a DC component up to 10 mA and currents with high harmonics, making it a universal solution for modern installations with inverters or EV chargers.
• High short‑circuit resistance – withstands short circuits up to 10 kA, ensuring safety even during severe network faults.
• DIN‑rail compatible – four‑module width allows easy mounting in standard distribution boards without additional mounting hardware.
• Easy testing – the “Test” button enables quick verification of proper operation without shutting down the entire installation.
• Contact position indicator – intuitive indicator shows whether the breaker is in the ON (closed) or OFF (open) position.
• Terminal protection – design prevents accidental contact with live parts, and the lever can be sealed to increase protection against unauthorized access.

Installation and standards compliance

The device is mounted on a DIN rail in an electrical panel; its enclosure meets IP20 protection class, sufficient for dry installation rooms. Conductors with cross‑sections from 1 mm² to 35 mm² (single‑core and multi‑core) can be connected directly to the upper or lower terminals, simplifying wiring. The breaker complies with IEC/EN 61008‑1 and DIN VDE 0100‑482/IEC 60364‑4‑482 standards, and its conditional short‑circuit current rating is 4 kV, guaranteeing reliable operation under typical industrial conditions (ambient temperature 25…40 °C). Thanks to instantaneous tripping times and the possibility of additional accessories (auxiliary contacts, release mechanisms), it is ready for integration into advanced protection systems.