What it is and what it does
The Siemens SENTRON 5SL4413-7 is a 4-pole miniature circuit breaker (MCB) with a C-tripping characteristic, rated 13 A at 30 °C and breaking 10 kA per IEC 60898 and IEC 60947-2. It's built for residential and infrastructure panels — think sub-distribution boards, lighting circuits, general-purpose socket outlets where the inrush isn't too nasty. The C-curve means it trips between 5 and 10 times rated current, so it'll handle motor start-ups and capacitive loads without nuisance tripping, but still clears a hard fault fast. Rated voltage is 400 V AC phase-to-phase, with a maximum of 440 V in multi-phase operation. That's standard for three-phase distribution in most European and IEC-based installations. It's a 4-module-width unit (72 mm wide), so it'll eat four slots on a standard DIN rail. Depth is 76 mm, installation depth 70 mm — check your enclosure depth if you're retrofitting into a shallow box.
Where it goes and how it mounts
Snaps onto DIN rail in any mounting position — no orientation restrictions. IP20 with connected conductors, so it's strictly for dry indoor panels. Sealable, halogen-free, silicon-free — fine for clean-room or low-outgassing environments if the panel's sealed. Degrees of pollution 2 and overvoltage category III — that's your standard fixed-installation environment. Touch protection is built in.
Thermal derating — the real-world number
The 13 A rating is at 30 °C ambient. At 40 °C it's 12.31 A; at 55 °C it drops to 11.2 A. If your panel runs hot — and most do — size your load against the derated figure, not the label. Mechanical life is 10,000 cycles typical, which is fine for distribution but not for frequent switching duty.