5SY4640-7

This Siemens 5SY4640-7 is a miniature circuit breaker designed for robust protection in industrial and mechanical engineering applications. It offers a 4-pole configuration with a 3+N pole design, rated for 400V AC supply voltage and a 40A operational current at 35°C.

The breaker features a C-curve tripping characteristic, providing protection against overcurrents and short circuits with a switching capacity of 10kA according to EN 60898. It is equipped with combined terminals for both top and bottom connections, and supports neutral conductor switching. The unit is designed for DIN rail mounting, ensuring easy installation within control panels.

With a mechanical service life of 10,000 switching cycles and an IP20 protection class when connected, this circuit breaker is built for reliability. It also boasts halogen-free and silicon-free construction, contributing to safety in various environments. The operational current is rated up to 40A at 35°C, with derated values at higher temperatures.

Key technical specifications include an insulation voltage of 440V AC, an overvoltage category of III, and a degree of pollution of 3. The breaker supports a wide range of conductor cross-sections, from 0.75 mm² to 35 mm² for solid and stranded conductors, and up to 25 mm² for finely stranded conductors with core end processing. Tightening torques range from 2.5 to 3.5 N·m.