Siemens 5SY4125-6

The Supplementary Protector operates at a rated current of 25 A and is designed for use in AC voltage systems up to 400 V. Featuring a width of 18 mm and a depth of 70 mm, this device adheres to UL1077 standards and is classified under the trip characteristic curve B, making it suitable for various applications including those requiring a rated short-circuit breaking capacity of 10 kA at both 230 V and 400 V.

With a built-in depth of 70 mm, this miniature circuit breaker is constructed for a pollution degree of 3 and an overvoltage category of 3. The device also ensures safe operation in ambient temperatures as low as -40 °C. Its degree of protection is IP20, which allows for reliable usage in controlled environments.

For installation, the device supports a connectable conductor cross-section of 0.75 mm² for both solid-core and multi-wired conductors. The rated insulation voltage is 440 V, and it is equipped for potential additional equipment connections. The Supplementary Protector conforms to UL File E116386 in Volume 1 Section 2, ensuring compliance with relevant safety standards.