SENTRON 5SY7410-7CC — 4-pole C-curve MCB for panel and machine builds
It breaks 25 kA at 400 V AC per IEC 60947-2, and 5 kA per UL 1077 and CSA C22.2 No. 235 — enough headroom for most industrial panel secondary circuits and machine control cabinets. For a 10 A breaker, that means the magnetic trip fires between 50 A and 100 A — fast enough to clear a hard short, tolerant enough to ride through a brief inrush. Rated for 400 V AC phase-to-phase (440 V single- or multi-phase), with a max DC rating of 72 V — so it covers standard 400 V three-phase panels and some lower-voltage DC branches, but not a 125 V DC bus.
Mounting position any, so it fits horizontal or vertical busbars without derating. IP20 with conductors connected — fine for enclosed panels, not for open washdown zones. Sealable cover is standard, which matters for panel builders who lock out circuits during maintenance.
For a fast-moving 10 A C-curve 4-pole MCB, expect standard lead times — this is a common panel spare, not a long-tail oddity.
With 25 kA IEC breaking capacity at 400 V, this breaker coordinates cleanly downstream of a larger molded-case or air circuit breaker in a typical distribution board. The 5 kA UL 1077 rating covers North American panelboard applications where the upstream device limits fault current.