What it is and what it does
The Siemens 5SY4610-7 is a 4-pole (3P+N) miniature circuit breaker from the SENTRON series, designed for branch-circuit protection in industrial control panels and distribution boards. Its C-curve tripping characteristic means it handles moderate inrush currents — typical for motor starters, contactor coils, and small transformers — without nuisance tripping, while still clearing overloads and short circuits within the standard time-current band. Breaking capacity is rated at 10 kA per IEC/EN 60898-1 and 20 kA per IEC 60947-2, with a DC rating of 15 kA per IEC 60947-2 and 5 kA per UL 1077 / CSA C22.2 No.235. That spread covers most industrial and commercial fault levels; the 20 kA IEC 60947-2 figure is the one to use when coordinating with upstream devices in a selective scheme.
Mounting and integration
Occupies 4 modular-width units (72 mm) on a DIN rail. Depth is 76 mm, with 70 mm installation depth behind the panel. IP20 with connected conductors — standard for enclosed distribution boards; not rated for washdown or outdoor exposure without a secondary enclosure.
Lifecycle and compliance
Listed as current production. Compliance covers IEC/EN 60898-1, IEC/EN 60947-2, and UL 1077. Halogen-free and silicon-free construction — relevant for clean-room or high-reliability environments where outgassing matters. Sealable for lockout/tagout procedures.