The Siemens SENTRON 5SN4606-7CN is a 6 A miniature circuit breaker with a C tripping characteristic, configured as a 4-pole unit (3P+N) with a switched neutral. It's rated for 400 V AC multi-phase operation and delivers a 10 kA breaking capacity per EN 60898 — the standard for overcurrent protection in residential and commercial final circuits. The C-curve (5–10× In) means it's sized for moderate inrush loads like small motors, lighting banks, and transformer primaries; it holds through startup without nuisance tripping on a panel fed from a standard distribution transformer.
What the ratings mean for the panel
The 10 kA breaking capacity at 400 V AC (per EN 60898) tells you this MCB can safely interrupt a fault current up to 10,000 A — typical for a sub-distribution board fed from a 200–400 kVA transformer with short cable runs. The 3P+N design switches all three phases and the neutral, so it's a drop-in for a 3-phase + N distribution board where you need to isolate the neutral for maintenance or downstream RCD coordination. The C-curve avoids trips on the magnetizing inrush of a 4–5 kVA control transformer or a bank of LED drivers. It occupies 4 modular width units on a DIN rail (72 mm wide) and is rated for any mounting position — no derating needed if the panel is vertical or horizontal. The IP20 rating with connected conductors is standard for enclosed distribution boards; the touch protection feature and sealable design let you lock the handle position for lockout/tagout without removing the cover.
Integration and environment
Snap it onto a 35 mm DIN rail in any panel position. The 76 mm depth and 70 mm installation depth leave enough clearance for a standard 100 mm deep enclosure — no need to upsize the box. Accepts solid conductors up to 25 mm², so it can be fed from a 25 A subfeed or a 16 A radial circuit without a separate terminal block. The neutral conductor switching means the N pole disconnects with the phases, which is required in some regional wiring codes (e.g., UK 17th/18th Edition) for final circuits. Rated for ambient temperatures from -40 °C to +75 °C, with a humidity limit of 95% at +55 °C. That covers unheated plant rooms, outdoor enclosures in temperate climates, and hot roof-top switchgear. Vibration resistance to 50 m/s² at 25–150 Hz per IEC 60068-2-6 means it holds calibration under transformer hum or pump vibration without nuisance trips.