Residual current device ETI EFI-P4 4P 63/0.3A type AC 10kA (2061633)

ETI EFI-P4 residual current device is designed to protect electrical circuits against leakage currents and the consequences of indirect contact with live parts. It is used in distribution boards in residential, commercial, and industrial installations where automatic disconnection of the supply is required when a differential current appears. As a residual current device, it performs protective shutdown in AC circuits and helps maintain electrical safety in the protected line. The device is rated for a nominal current of 63 A and a residual current setting of 0.3 A. Type AC means it responds to sinusoidal alternating residual currents, so it is intended for networks where this tripping characteristic matches the expected leakage current profile. The 3+N pole configuration makes the unit suitable for four-wire systems with three phases and a neutral conductor. Rated voltage is 400/415 V AC, and rated frequency is 50/60 Hz, which covers widely used power supply systems. Installation is carried out on a TH 35 DIN rail, allowing the device to be integrated into modular electrical panels alongside other control and protection devices. The installation depth is 68 mm, which should be taken into account during panel design and layout planning. The nominal short-circuit current Inc of 10 kA indicates suitability for networks with the corresponding prospective fault current level. The conductor connection range of 1–25 mm² supports a wide selection of cable cross-sections for practical wiring work. The device complies with IEC/EN 61008, confirming its conformity to the standard for residual current-operated protective devices without integral overcurrent protection. The IP20 protection rating means it is intended for installation inside an enclosure, where it is protected against access to live parts during normal use. Overall, the ETI EFI-P4 offers residual current protection for circuits that require monitoring of leakage current, reliable disconnection during fault conditions, and compatibility with standard modular switchboard equipment.