Supply voltage is 230 V AC single-phase, and it also carries a 72 V DC rating for control-circuit protection on the DC side of a rectifier.
The 6 kA breaking capacity per EN 60898 is the standard for domestic distribution boards; if your fault-current study shows prospective short-circuit current above 6 kA at this point, step up to the 10 kA variant (5SL4363-7 family). The neutral pole is switched but not protected — it opens with the line pole on a fault, which satisfies disconnection requirements for single-phase final circuits in most residential and infrastructure installations. The sealable design allows a utility or inspector to lock the toggle position — useful for lockout/tagout on a dedicated circuit.
Installation depth is 70 mm — verify your enclosure depth if you're back-panelling with busbars or wiring ducts behind the DIN rail. The 2-module width (36 mm) is the same as the 5SL6550-7BB and half the width of a 3-pole unit like 5SL4363-7. Mounting position is any, so horizontal DIN-rail orientation in a shallow enclosure is fine. No auxiliary contacts, shunt trips, or under-voltage releases can be snapped on — the product extension is listed as 'No'. If you need alarm signalling or remote tripping, you'll need a different SENTRON frame (the 5SL series supports add-on modules).