Residual current circuit breaker EFI-P4 AC 25/0.3 002061631

### Protection and safety in electrical installations

Residual Current Device (RCD) EFI-P4 AC 25/0.3 is a reliable device designed to protect people and equipment from the effects of electric shock and fire hazard. Its operation is based on the rapid detection of leakage currents, which ensures effective protection in the event of direct or indirect contact with live parts. This switch is used in various electrical networks – TN-S, TN-C-S, TT and IT – where separating the neutral and earth conductors is crucial.

This four-pole residual current device with a rated current of 25A and a sensitivity of 0.3A has been designed for effective operation in installations with a rated voltage of 415V and a frequency of 50/60Hz. Its design allows for mounting on a DIN rail, and a width of 4 modules ensures compact dimensions. The switch is characterized by a high surge current resistance of up to 0.4kA and a conditional short-circuit resistance of 10kA, which guarantees its stable operation even in difficult operating conditions.

Construction features and application

The EFI-P4 AC 25/0.3 switch is distinguished by a solid construction and high quality of workmanship, confirmed by a fully automated production process. It has a built-in test button, allowing for regular checking of the device's functionality, and an indicator of the main contact position for quick identification of the switch status (ON/OFF). Additionally, terminal protection against contact with voltage and the possibility of sealing the lever increase safety. The terminal design allows the use of insulated busbars at the top and bottom of the switch.

The use of residual current devices is crucial to ensure safety in residential, commercial and industrial buildings. Depending on the needs, they can be used to protect against indirect (≤ 300 mA) or direct contact (≤ 30 mA), as well as to protect against fire in accordance with DIN VDE 0100-482 and IEC 60364-4-482 standards. Their use is particularly important in installations with heating elements with high resistance (e.g., infrared ceiling heaters), where a differential current of 30 mA is required.

Technical parameters and compliance with standards

The EFI-P4 AC 25/0.3 switch meets high standards of quality and safety, confirmed by appropriate certificates and compliance with industry standards. It has a protection degree of IP20, which means protection against touching with a finger and against the ingress of solid objects larger than 12.5 mm. It is designed to operate in ambient temperatures from -25°C to +55°C. It accepts multi-wire and solid-core wire cross-sections from 1 to 25 mm². This makes it a universal solution for a wide range of installation applications.