The Siemens SENTRON 5SY7363-8 is a 3-pole miniature circuit breaker (MCB) with a D tripping characteristic, rated for 15 kA breaking capacity under both IEC/EN 60898-1 and IEC 60947-2. The 15 kA rating holds at 400 V AC and 60 V DC, so it's comfortable in both industrial power distribution and control circuits. It's an active, current-production part, so it's a straightforward BOM line to source.
Panel fit and mounting reality
Standards and compliance — what the approvals actually cover
This MCB carries dual certification: it's listed to IEC/EN 60898-1 (the residential and light-commercial MCB standard) and IEC 60947-2 (the industrial circuit-breaker standard) plus UL 1077 for the North American market. That means it's accepted for both IEC and UL panels — no need to swap parts for a dual-rated job. The 15 kA breaking capacity is the same under both IEC standards; under UL 1077 it's rated 5 kA, which is typical for supplementary protectors in that framework.