Residual current device ETI EFI-P4 4P 40A 0.03A type AC 10kA (2061612)

ETI EFI-P4 is a residual current device designed to monitor leakage currents and disconnect a circuit automatically when insulation faults or other dangerous differential currents appear. It is used in residential, commercial, and small industrial electrical systems where protection of people and equipment from fault conditions is required. The 3+N pole configuration makes the device suitable for four-wire networks with a neutral conductor, and the TH 35 mounting method allows installation in a distribution board on a standard DIN rail. The device is rated for 40 A and has a residual current sensitivity of 0.03 A, which corresponds to 30 mA. This sensitivity level is commonly used for additional personal protection against electric shock. Type AC means the unit responds to sinusoidal alternating residual current, so it is intended for circuits with standard load characteristics. The rated AC voltage is 400/415 V, and the rated frequency is 50/60 Hz, which matches common three-phase supply systems. The short-circuit rated current Inc of 10 kA indicates suitability for operation in networks with the corresponding prospective fault current level. The device supports conductor cross-sections from 1 mm² to 25 mm², which simplifies wiring of circuits with different cable sizes within the specified range. The housing depth is 68 mm, an important parameter when planning space inside the switchboard and arranging adjacent modular devices. With IP20 protection, the unit is intended for installation inside electrical enclosures and provides basic protection against contact with solid foreign objects. Compliance with IEC/EN 61008 confirms that the device belongs to the residual current protective device category and meets the relevant technical requirements for this type of apparatus.