The Siemens SENTRON 5SY4116-7CC11 is a 1-pole miniature circuit breaker rated 16 A with a C tripping characteristic and a 10 kA breaking capacity at 400 V AC per EN 60898.
Sizing and fit in the panel
The 70 mm installation depth plus the quick-assembly mounting means it fits into compact enclosures without needing extra clearance behind the rail. Mount it in any position — vertical, horizontal, upside down — and it still trips at the same calibrated curve. Both top and bottom terminals accept combined screw/clamp connections, so you can land a ring tongue or a bare wire without swapping parts. Touch protection is built in — no accidental finger contact on the energized bus bar after installation.
Where it belongs on the line
This breaker is designed for mechanical engineering and industrial environments, not residential lighting panels. The 400 V AC rated voltage covers three-phase line-to-line circuits common in control cabinets; the 440 V single-phase and multi-phase rating gives you margin on a 480 V system. It also carries a DC rating up to 72 V — handy for control-power circuits in the same enclosure. The IP20 protection class (with conductors connected) is typical for a DIN-rail MCB inside a closed panel — no washdown rating here, so keep it behind a gland plate or enclosure door.
For a panel originally built with the 5SY4116-7CV peer, the 5SY4116-7CC11 shares the same 18 mm width, 1-pole footprint, C16 rating, and 10 kA breaking capacity — it drops into the same DIN slot without rewiring. The difference is in the terminal design or accessory compatibility; verify the terminal type if your panel uses a specific busbar or shunt.