What the ratings mean for fit
The 5SL4616-7CC: The C-curve means the magnetic trip threshold is 5 to 10 times In — so 80 to 160 A instantaneous. That's the standard choice for general-purpose loads like lighting, socket circuits, and small motor feeders where you need some inrush headroom but not the full D-curve tolerance. The 10 kA breaking capacity at 400 V AC is rated per EN 60898, the household-standard — it safely interrupts a fault up to 10 kA without welding the contacts. That's adequate for most residential and light commercial distribution boards; if your fault current exceeds 10 kA at the panel, you'll need a higher-rated upstream device or a current-limiting MCB. 3P+N design switches three phases and neutral. Neutral pole is switched but not protected. 4 MW units width (72 mm). Installation depth 70 mm, overall depth 76 mm.
Derating and environmental limits
The 16 A rating holds at 30 °C ambient. Above that, it derates linearly: 15.15 A at 40 °C, 14.71 A at 45 °C, 14.26 A at 50 °C, 13.79 A at 55 °C (–). If your panel ambient runs 50 °C, you're effectively working with a 14 A breaker — size your load accordingly. The operating range is -40 to 75 °C, so it's fine for unheated enclosures in cold climates. Pollution degree 2 and overvoltage category III are standard for fixed-installation distribution boards.