The SIEMENS 5SY6125-7 is a 1-pole miniature circuit breaker rated for 25 A at 230/400 V with a type C trip characteristic and a 6 kA short-circuit breaking capacity. Designed for distribution boards and branch-circuit protection, it clears faults quickly to protect wiring and connected equipment while allowing normal inrush currents from motors and transformers. Its 70 mm depth fits standard panel layouts and simplifies installation in confined enclosures. Use this breaker where reliable overcurrent protection and straightforward integration into existing DIN-rail systems are required.