Residual current device ETI EFI-P4 4P 63A/0.1A type AC 10kA (2061623)

ETI EFI-P4 is a residual current device designed to monitor leakage currents and disconnect the supply when a dangerous imbalance is detected. It is used in distribution boards of residential, commercial, and small industrial installations where protection against insulation faults and indirect contact with live parts is required. By responding to differential current, the device helps ensure electrical safety in three-phase systems with a neutral conductor. This model is built in a 3+N, 4-pole configuration, which makes it suitable for circuits operating in 400/415 V AC networks. The rated current is 63 A, so the device can be integrated into circuits with a corresponding load level. The residual operating current is 0.1 A, providing sensitivity for applications where leakage current control is needed without excessive tripping. Type AC means the unit is intended to react to sinusoidal alternating residual current. The device has an assigned short-circuit current rating Inc of 10 kA, which is an important parameter for installations where higher fault currents may occur. It is mounted on a TH 35 DIN rail, allowing straightforward installation in standard modular switchboards. The housing depth is 68 mm, which should be considered when planning enclosure space and wiring arrangement. Connection of conductors is permitted within the 1 mm² to 25 mm² cross-section range, covering typical wiring sizes used in distribution circuits. The protection degree is IP20, indicating protection against finger access to hazardous live parts and confirming suitability for installation inside a closed electrical cabinet rather than in exposed locations. Compliance with IEC/EN 61008 places the device within the category of residual current devices and confirms its intended use as a protective switching element in low-voltage installations. Overall, ETI EFI-P4 is suitable for circuits where residual current protection, three-phase compatibility, and standardized modular installation are required. Its technical characteristics make it appropriate for use as part of electrical safety systems in distribution panels serving various building types.