Siemens SENTRON 5SL6210-7BB — 2-pole C-curve MCB, 10 A, 6 kA
The Siemens SENTRON 5SL6210-7BB is a 2-pole miniature circuit breaker with a C tripping characteristic, rated 10 A at 30 °C and 400 V AC. Its 6 kA breaking capacity is certified to both EN 60898 and IEC 60947-2, covering residential and light commercial panelboards where the prospective fault current stays under that threshold.
What the ratings mean for fit
The C-curve (magnetic trip between 5× and 10× In) is the standard choice for general-purpose lighting and outlet circuits where moderate inrush from small motors or capacitive loads is expected. At 10 A it protects 2.5 mm² copper wiring in a 230/400 V distribution board. The 6 kA SCCR per both EN 60898 and IEC 60947-2 means it safely interrupts a 6 kA prospective fault without upstream fuse backup — adequate for most residential and commercial sub-distribution, though a facility with higher fault levels (e.g., transformer-fed industrial switchgear) would need a higher-rated upstream device or a breaker with a higher Icn. Temperature derating is published: 9.24 A at 40 °C, 8.8 A at 45 °C, 7.96 A at 55 °C. If the panel ambient runs above 30 °C, the actual continuous load must be adjusted accordingly — a common oversight in densely packed enclosures.
Panel integration and physical fit
Occupies 2 modular width units (36 mm) on a DIN rail. Depth of 76 mm and installation depth of 70 mm leave clearance for standard enclosure depths. Rated IP20 with connected conductors — suitable for enclosed distribution boards, not for washdown or outdoor exposure. Mounting position is unrestricted, which simplifies layout in tight cabinets.