What the ratings mean for your panel
The 5SL6216-8CC is a Siemens SENTRON miniature circuit breaker (MCB) with a D tripping curve, rated 16 A at 400 V AC and a breaking capacity of 6 kA per EN 60898. The D characteristic means it tolerates high inrush currents — typically 10 to 20 times the rated current — before the thermal-magnetic trip operates, so it's the right choice for motor starters, transformers, or lighting ballasts that draw a heavy surge on energization. The 2-pole design switches both phase conductors, which is what you need for a single-phase 230 V load or a two-phase leg of a three-phase distribution board. The 6 kA breaking capacity at 400 V is adequate for most residential and light commercial service-entrance panels where the prospective fault current stays under that level; if your transformer or utility feed can deliver more, you'll need to step up to a 10 kA or higher-rated MCB in the same SENTRON family. The 36 mm width (2 modular units) and 76 mm depth let it snap onto a standard DIN rail in any mounting position. The IP20 rating with connected conductors means it's protected against finger contact once wired, but it's not sealed against dust or moisture — keep it inside an enclosure rated for the environment. Operating temperature spans -40 °C to 75 °C, so it handles unheated utility rooms or outdoor-rated enclosures in cold climates without derating.
Panel integration and wiring
The 5SL6216-8CC occupies 2 modular width units (36 mm) on a 35 mm DIN rail, with a 70 mm installation depth behind the panel surface. It accepts supplementary devices (auxiliary switches, shunt trips, alarm contacts) that clip onto the right side without increasing the width. The sealable design lets you lock the toggle position with a lead seal or a small padlock — useful for circuits that must stay locked off during maintenance. Power loss per pole at rated current is 2.8 W in hot operating state, so in a densely packed enclosure with multiple MCBs side by side, account for the cumulative heat; the 75 °C maximum ambient is the upper limit for the enclosure interior, not just the room temperature.
Compliance and approvals
Rated for overvoltage category III and pollution degree 2, the 5SL6216-8CC is designed for residential buildings and infrastructure per its suitability listing. It carries the EN 60898 rating for 6 kA breaking capacity at 400 V AC, 50/60 Hz. The halogen-free and silicon-free construction matters for environments where outgassing from a fault could damage sensitive electronics or optics — clean-room adjacent panels, for example. Vibration resistance tested to 50 m/s² at 25 to 150 Hz per IEC 60068-2-6, so it holds up on machinery that shakes.