Siemens 5SY4408-7

The Supplementary Protector is designed for circuit protection in various applications. It features a 4-pole configuration with a rated current of 8 Amps and operates at a voltage of 480 VAC.

This device adheres to the UL1077 standard and is classified with a trip characteristic Curve C, which is suitable for inductive loads. Its compact dimensions include a width of 72mm and a depth of 70mm, making it suitable for installation in confined spaces. Additionally, it offers a degree of protection rated at IP20, ensuring safe operation in standard environments.

With a pollution degree of 3 and an over-voltage category of 3, this supplementary protector can manage various operational conditions. It also supports a rated impulse withstand voltage of 4 kV, making it capable of withstanding transient voltages.

The device's rated short-circuit breaking capacity is 10 kA at 400 V and 20 kA at 230 V, ensuring reliable protection against short circuits. It is designed for use with solid-core and multi-wired conductor cross-sections of 0.75 mm². The product is not explosion-proof and is not suitable for flush-mounted installation.