Siemens 5SY4140-7

The Supplementary Protector is designed for use in AC voltage systems, providing protection with a rated current of 40A and a trip characteristic curve C. Its compact design features a width of 18mm and a depth of 70mm, making it suitable for various installations where space is a consideration.

This device complies with UL1077 standards and is classified as an IEC Mini Circuit Breaker. The rated voltage is up to 400V, and it offers a rated insulation voltage of 440V. It has a pollution degree of 3 and is rated for an operating ambient temperature range of -40 °C. The degree of protection is IP20, ensuring adequate safety for indoor applications.

With a rated short-circuit breaking capacity of 10kA at 230V and 15kA at 400V according to standard IEC 60947-2, this circuit breaker can effectively manage fault conditions. It supports conductor cross-sections of 0.75 mm² for both solid-core and multi-wired connections. The supplementary protector is UL File E116386 certified, ensuring its compliance with safety standards.