The Siemens 5SL6305-7RC is a SENTRON miniature circuit breaker — 3-pole, C characteristic, rated 0.5 A at 415 V AC with a 7.5 kA breaking capacity per EN 60898. Rated for residential and infrastructure branch-circuit protection, it handles single-phase up to 250 V AC and multi-phase up to 440 V AC.
At 0.5 A, this is a low-current branch protector — sized for control transformers, signal supplies, or instrumentation loops where a standard 1 A or 2 A MCB would be too coarse. The 72 V DC maximum rating covers control-circuit DC supplies, but the C curve's magnetic trip threshold (~5–10 A) means it may not clear a DC fault as fast as a dedicated DC-rated MCB — check coordination with downstream loads. Mechanical endurance is 10 000 switching cycles, typical for a distribution breaker. Halogen-free and silicon-free construction matters in clean-room or semiconductor-adjacent panels where outgassing contaminates optics or contacts.
Three modular width units (each 18 mm nominal) — 54 mm total width. The MCB is sealable (tamper-evident seal wire or sticker) for revenue-metering or compliance applications. Touch protection is integral. No neutral pole switching; use a separate neutral bar or 4-pole MCB if neutral disconnection is required.