What the ratings mean for fit
The Siemens SENTRON 5SL6610-7 is a 3P+N miniature circuit breaker rated 10 A at 400 V AC with a C tripping characteristic. The C-curve (magnetic trip between 5× and 10× In) is the standard choice for general-purpose branch circuits feeding mixed resistive and light inductive loads — think lighting, socket outlets, small motor starters in residential or light commercial panels. The 6 kA breaking capacity per EN 60898 and IEC 60947-2 means it safely clears a fault up to that prospective short-circuit current without welding contacts or rupturing the case; for most domestic and infrastructure distribution boards fed by a transformer of similar kVA rating, that's sufficient headroom. Thermal derating is published: the breaker carries its full 10 A at 30 °C ambient, drops to 9.52 A at 40 °C, 9 A at 45 °C, and 8.74 A at 55 °C. If the panel ambient runs above 30 °C — common in a sealed outdoor enclosure or a crowded DIN-rail cabinet — size the upstream load to the derated value, not the nameplate 10 A. Four modular width units (72 mm wide) snap onto a standard DIN rail; the 76 mm depth leaves clearance behind a 100 mm deep enclosure. Installation depth is 70 mm, so the breaker body sits flush with the rail. IP20 with connected conductors — fine for a dry indoor panel, not for washdown zones.
Integration notes for the panel builder
Mounting position is any — no derating for horizontal or inverted orientation. The breaker is sealable (padlockable toggle) for lockout/tagout compliance. Halogen-free and silicon-free construction matters for environments sensitive to outgassing, such as clean rooms or sealed enclosures near optical equipment. Overvoltage category III and pollution degree 2 — standard for fixed-installation distribution boards. Energy limitation class 3 means it limits let-through energy to a level that downstream components (cables, contactors) can survive a fault without additional coordination.