Siemens 5SY4118-7 SENTRON — 1-pole C-curve MCB
The Siemens 5SY4118-7 is a 1-pole miniature circuit breaker from the SENTRON family, with a C-curve trip characteristic. It carries a 10 kA breaking capacity per IEC/EN 60898-1 and 20 kA per IEC 60947-2, making it suitable for general-purpose branch-circuit protection in industrial control panels. The 18 mm width (1 modular unit) fits standard DIN-rail enclosures; the 76 mm depth leaves clearance for gland plates and wiring ducts.
Breaking capacity and dual-standard certification
Rated 10 kA at 400 V AC per IEC/EN 60898-1 and 20 kA at 400 V AC per IEC 60947-2, the 5SY4118-7 also carries a 15 kA DC rating at 60 V per IEC 60947-2 and a 5 kA rating per UL 1077 / CSA C22.2 No.235. This dual-standard certification (IEC 60898-1 for residential/commercial, IEC 60947-2 for industrial, plus UL/CSA for North American acceptance) means the same part can be specified across global BOMs without requalification.
Panel integration and environmental limits
Mounts in any position via the quick-assembly system (DIN rail). The 18 mm width (1 modular unit) and 70 mm installation depth allow dense packing in standard enclosures. IP20 with connected conductors; rated for pollution degree 3 and overvoltage category III. Ambient range -40 °C to 75 °C, with humidity derating above 55 °C. Halogen-free and silicon-free construction suits clean-room or sensitive electronics environments.