The Siemens SENTRON 5SL1270-7MB is a 2-pole miniature circuit breaker with a C tripping characteristic, rated 70 A at 30 °C. The 3 kA breaking capacity per IEC 60947-2 is the maximum fault current it can safely interrupt; for residential and light commercial panels where the prospective short-circuit current stays under 3 kA, this breaker is a clean fit. At 230 V single-phase or 400 V three-phase (multi-phase operation rated at 440 V maximum), it handles the standard European mains voltages. The 2-module-width (36 mm) footprint snaps onto a DIN rail, and the IP20 rating with connected conductors means it's for enclosed panel use only, not washdown areas.
Depth is 76 mm, installation depth 70 mm — leaves 6 mm behind the rail for wiring clearance. Halogen-free and silicon-free construction, so it's safe for use in clean environments like data centers or medical facilities where outgassing matters.
Rated for ambient temperatures from -40 °C to +75 °C, with a pollution degree of 2 and overvoltage category III — suited for fixed installations in residential and infrastructure buildings. The 4,000 mechanical switching cycles typical service life is adequate for normal branch-circuit duty where the breaker is operated infrequently.