ETI ETIMAT 10 circuit breaker 3P+N D 80A 20kA (2156731)

ETIMAT 10 from ETI is an automatic circuit breaker intended for protection of electrical circuits against overload and short circuit in AC networks. It is used in distribution boards of residential, commercial, and industrial facilities where three-phase lines with a neutral conductor must be switched and protected. The 3+N pole configuration allows simultaneous switching of three phase conductors and the neutral, which is suitable for many power and distribution circuits. The device is rated at 80 A, so it is designed for lines with a corresponding load level. The D tripping characteristic makes it appropriate for circuits with higher inrush currents, where temporary startup peaks should not cause nuisance tripping. This is especially relevant for equipment that draws a current surge during start-up, higher than its operating current. With a breaking capacity of 20 kA, the breaker can interrupt high short-circuit currents, which makes it suitable for installations with a significant prospective fault current. The breaker is rated for 400 V AC and a frequency of 50/60 Hz. The rated impulse withstand voltage, Uimp, is 4 kV, which is important for operation in standard electrical systems and for resistance to impulse overvoltage. The permitted conductor cross-section is 25–50 mm², a parameter that must be considered when designing and installing the outgoing and incoming connections. This automatic circuit breaker complies with IEC/EN 60898-1 and IEC 60947-2, confirming conformity with common requirements for protective switching equipment. The combination of 3+N poles, 80 A rated current, D characteristic, and 20 kA breaking capacity makes it a practical solution for protection of distribution and power circuits in AC installations where both operational switching and reliable fault protection are required.