Siemens 5SY4525-5

The Supplementary Protector is designed for effective circuit protection, featuring a configuration of 1 pole plus neutral and a rated current of 25 A. Operating at a voltage of 277 VAC, it adheres to UL1077 standards and is classified under IEC Mini Circuit Breakers. With a trip characteristic of Curve A and a compact width of 36 mm, this device is suitable for various applications.

Its rated impulse withstand voltage (Uimp) is 4 kV, ensuring robustness against transient voltages, while the protection category is rated at IP20, indicating a degree of protection against solid objects. This unit operates effectively in environments with ambient temperatures as low as -40 °C. The built-in depth measures 70 mm, allowing for integration into tighter spaces.

Additionally, it supports connections for both solid-core and multi-wired conductors with a cross-section of 0.75 mm². This Supplementary Protector is capable of concurrently switching the neutral and meets the requirements for a pollution degree of 3. With a rated short-circuit breaking capacity of 10 kA at 230 V per EN 60898, it provides reliable protection in case of faults.

Notable specifications include a rated insulation voltage (Ui) of 250 V and a total of 2 poles. The UL File number is E116386, located in Volume 1, Section 2, confirming its compliance with safety standards.