Siemens 5SL3102-7MB — 1-pole C-curve MCB for 2 A lighting and control circuits
The Siemens 5SL3102-7MB is a 1-pole miniature circuit breaker from the SENTRON series, rated 2 A with a C-trip curve and a 4.5 kA breaking capacity per EN 60898 at 230/400 V AC.
The 4.5 kA breaking capacity at 400 V is the standard residential/infrastructure rating per EN 60898 — adequate for most final subcircuits in a TN or TT system, but not for high-fault industrial panels where 10 kA or higher is common. The 1-pole design switches only the phase; neutral is common. At 18 mm wide, it snaps into any standard DIN-rail enclosure and leaves room for adjacent breakers or accessories like shunt trips or auxiliary contacts.