What it is and what the ratings mean for fit
The Siemens 5SL4616-7 is a SENTRON miniature circuit breaker — 3-pole plus switched neutral, 16 A, C-curve, rated 10 kA breaking capacity per both EN 60898 and IEC 60947-2 at 400 V AC. That 10 kA SCCR means it can safely interrupt a fault current up to that level without welding its contacts or cascading damage upstream in the panel. The C-curve trips between 5× and 10× rated current, so it's the right choice for moderate inrush loads like small motor starters, contactor coils, and lighting banks in residential and light commercial infrastructure. The 3P+N design (4 poles total, 4 modular width units at 18 mm each) gives you a 72 mm-wide footprint on the DIN rail. Depth is 76 mm, height 90 mm, installation depth 70 mm — standard SENTRON dimensions, so it drops into any panel laid out for this series. Rated for overvoltage category III and pollution degree 2, which covers fixed-installation distribution boards in buildings.
Panel integration notes
Mounts in any position on standard DIN rail. The housing is IP20 with conductors connected, so it's meant for enclosed distribution boards — not for wet or dusty environments. Sealable, halogen-free, silicon-free. Accepts supplementary devices (auxiliary switches, shunt trips, alarm contacts) for remote status or emergency-off circuits. Power loss is 1.5 W per pole at rated current in hot operating state — 6 W total for the 4-pole unit. Factor that into your enclosure thermal calculation if you're packing several breakers side by side. Mechanical service life is 10,000 operating cycles typical, which is standard for this class of MCB. Rated for ambient temperatures from -40 °C to 75 °C, so it handles unheated utility rooms or hot switchgear cabinets without derating concerns. The 50/60 Hz rating covers both mains frequencies globally.