Siemens 5SN6250-7CP — 2-pole MCB for 400 V AC distribution
The Siemens 5SN6250-7CP is a 2-pole miniature circuit breaker from the SENTRON 5SN series, rated for 400 V AC supply voltage at 50 Hz. It carries a breaking capacity of 6 kA per EN 60898 and 10 kA per IEC 60947-2 — the higher figure under the industrial standard means it can safely interrupt fault currents up to 10 kA in a panel environment, giving you headroom over the residential-grade rating.
Two poles in a 36 mm wide housing (2 modular width units) means this breaker occupies two standard 18 mm DIN-rail slots. The 72 V DC maximum rating tells you this is primarily an AC device — it will switch DC control circuits up to 72 V, but the interrupting capacity on DC is not separately stated here. For DC-only applications, check the IEC 60947-2 DC rating on a dedicated DC-rated MCB. Solid conductor cross-section up to 35 mm² accepts the larger tails common in sub-distribution boards. Mechanical service life of 10,000 operating cycles is typical for this class of MCB — adequate for distribution switching, not intended for frequent motor-starting duty.
Snap-on DIN-rail mounting for 400 V AC branch-circuit protection in commercial and light-industrial distribution boards. The 6 kA EN 60898 rating suits domestic and commercial final circuits; the 10 kA IEC 60947-2 rating covers industrial panel applications where higher prospective fault current is expected.