Siemens 5SY8510-7 SENTRON MCB — C-Curve, 40 kA, 2-Pole
It carries a 40 kA rated short-circuit breaking capacity at 230 V AC per IEC 60947-2, and 15 kA at 60 V DC per the same standard. For UL 1077 applications, the interrupting rating is 5 kA. This is a current-production part, actively sourced through independent distribution.
The 15 kA DC rating at 60 V applies to DC control circuits or battery-backed loads — verify the DC voltage does not exceed 72 V. The 5 kA UL 1077 rating is the supplementary-protector limit for North American panels where the breaker is not the sole branch-circuit overcurrent device.
The 5SY8510-7 occupies 2 modular width units (36 mm) on a DIN rail, with a depth of 76 mm and an installation depth of 70 mm. It mounts in any position and uses a quick-assembly fastening system. IP20 protection applies with connected conductors; the enclosure is sealable for tamper-proofing in accessible locations.