The Siemens 5SL6214-7CC is a SENTRON miniature circuit breaker from the 5SL6CC design family, rated 0.3 A at 400 V AC with a C-curve tripping characteristic and a 6 kA breaking capacity per EN 60898. This 2-pole unit occupies 2 width units (36 mm) on the DIN rail and accepts conductors from 0.75 to 25 mm² solid or stranded.
What the ratings mean for your panel
The 0.3 A rated current and C-curve (5–10× In magnetic trip) make this MCB suited for protecting small lighting circuits, control transformers, or instrumentation loops where inrush is moderate. At 400 V AC, the 6 kA breaking capacity per EN 60898 certifies it for residential and infrastructure branch circuits up to that fault level — enough for most commercial panelboards. The 2-pole configuration switches both phase and neutral, though the neutral conductor is not switched internally (no neutral switching function per the spec). Mounting position is unrestricted, and the IP20 rating (with connected conductors) means it's intended for enclosed panel use only — not for wet or dusty environments. The ambient temperature range of -25 to +45 °C covers typical electrical rooms; storage from -40 to +75 °C accommodates warehouse extremes. Vibration resistance at 50 m/s² (25–150 Hz per IEC 60068-2-6) is solid for industrial panels near rotating machinery.
Wiring and installation notes
Terminals accept solid or stranded copper from 0.75 to 25 mm². Tighten screw terminals to 2.5–3 N·m — no special tools beyond a standard screwdriver. The 76 mm depth and 70 mm installation depth fit standard distribution boards; 2 width units (36 mm) mean it replaces a 2-pole MCB in any 18 mm-module DIN rail panel. Halogen-free and silicon-free construction is noted for sensitive environments like healthcare or clean-room adjacent panels.