Siemens SENTRON 5SL6213-7CC — 2-pole C-curve MCB at 13 A
The Siemens SENTRON 5SL6213-7CC is a 2-pole miniature circuit breaker with C-curve tripping characteristic, rated 13 A at 400 V AC and 6 kA breaking capacity per EN 60898. It occupies 2 modular width units (36 mm) on a DIN rail, with an installation depth of 70 mm and overall depth of 76 mm. The C-curve means it trips at 5 to 10 times rated current — the standard choice for general-purpose branch circuits feeding motor starters, contactor coils, and moderate inrush loads like small transformers or lighting banks. The 6 kA breaking capacity at 400 V AC is sufficient for most residential and light commercial distribution boards; for higher fault-current environments you'd step up to a 10 kA or 15 kA rated breaker.
Thermal derating and operating limits
The 13 A rating holds at 30 °C ambient. At 40 °C it derates to 12.26 A, at 45 °C to 11.87 A, at 50 °C to 11.47 A, and at 55 °C to 11.06 A. If your panel runs hot — say a packed enclosure near a process line — size the branch load against the derated figure, not the 30 °C number. The breaker is rated for overvoltage category III and pollution degree 2, which covers fixed installations inside buildings. Vibration resistance is 50 m/s² from 25 to 150 Hz per IEC 60068-2-6, so it holds up on machinery panels subject to moderate vibration.
Physical fit and panel integration
At 36 mm wide (2 modular units), it snaps onto standard 35 mm DIN rail. The 70 mm installation depth leaves clearance behind the rail for wiring — the overall 76 mm depth includes the front toggle. Mounting position is any orientation, which simplifies layout in tight enclosures. Touch protection is built in, and the breaker is sealable for applications requiring tamper-evident locking.
Environmental and material compliance
Halogen-free and silicon-free construction, so it won't outgas corrosive compounds in a sealed panel — relevant for sensitive electronics or food-processing environments. Operating temperature range spans -40 °C to 75 °C, which covers cold storage and outdoor enclosures. The IP20 rating (with connected conductors) is standard for enclosed distribution boards; it's not rated for wet locations without a secondary enclosure.