What it is and what it does
The Siemens 5SY5113-7CC12 is a 1-pole miniature circuit breaker from the SENTRON series, designed specifically for DC railway applications. It carries a C tripping characteristic and is rated 13 A at 35 °C, with a maximum DC operating voltage of 250 V. The 18 mm width (1 modular width unit) snaps onto a DIN rail via the quick assembly system, fitting standard panel layouts.
Railway and environmental qualification
This breaker is explicitly designed for railway applications (design of the product: for railway applications; suitability for operation: railway). It withstands vibration per IEC 60068-2-6 at 50 m/s² over 25 to 150 Hz — critical for onboard or trackside cabinets. The operating temperature range spans -40 °C to 75 °C, with humidity limits of 95% up to 55 °C, derating to 35% at 75 °C. Halogen-free and silicon-free construction reduces toxic gas and contamination risk in enclosed compartments.
Mounting and integration
Mounts in any position on a DIN rail via the quick assembly system. Depth is 76 mm, installation depth 70 mm; height 90 mm; width 18 mm (1 MWU). Combined terminals at top and bottom accept wiring without separate busbar adapters. Touch protection is built in. IP20 with connected conductors — suitable for enclosed panels, not for washdown or outdoor exposure.