Siemens 5SY4318-7

The Supplementary Protector is a 3-pole circuit breaker with a rated current of 15 Amps and is suitable for 480 VAC systems. It features a trip characteristic of curve C, making it appropriate for applications with moderate inrush currents.

With a width of 54 mm and a depth of 70 mm, this device is compact yet efficient. It meets UL1077 standards and is classified under IEC mini circuit breakers, ensuring reliable performance in demanding environments. This model has a rated short-circuit breaking capacity of 20 kA at 400 V and 10 kA at 230 V, providing robust protection against overloads and short circuits.

The device has an IP20 degree of protection, indicating its suitability for indoor use where direct contact with conductive parts is not likely. Designed for ambient temperatures ranging from -40 °C, it operates effectively even in harsh conditions. The Supplementary Protector is built for flexibility with additional equipment options and accommodates conductor cross-sections of 0.75 mm² for both solid and multi-wired connections.

For reference, the product is listed under UL File E116386 in Volume 1 Section 2.