Breaking capacity and trip curve — what governs fit
The 5SY4302-8 carries a dual breaking-capacity rating: 10 kA per EN 60898-1 and 35 kA per IEC 60947-2 at 400 V AC. Rated 400 V AC (440 V max for single- or multi-phase operation) and 60 V DC (72 V max) across three poles. The DC rating is low relative to the AC figure — expect to derate further if series-strapping poles for higher DC voltage.
Mounting position is unrestricted — vertical, horizontal, or flat — so it fits tight sub-panels where orientation is constrained. The breaker is sealable, halogen-free, and silicon-free — a requirement in paint-shop or clean-room environments where outgassing contaminates the process.
Lifecycle and sourcing — active, quoted to order
This is a current-production SENTRON 5SY4-series MCB. No end-of-life notice has been issued. Certified to IEC/EN 60898-1 for residential-style installation and IEC/EN 60947-2 / UL 1077 for industrial supplementary protection. The UL 1077 listing (5 kA at AC) is the ceiling for North American panelboard applications where the breaker serves as supplementary protection behind a branch-circuit OCPD.