The Siemens 5SY4613-6 is a 4-pole (3P+N) SENTRON miniature circuit breaker with B-curve tripping characteristic, rated 13 A at 35°C and 400 V AC.
Rating so-what and deployment context
The B-curve characteristic means this MCB handles loads without nuisance tripping on moderate inrush — think resistive heaters, lighting banks, and control transformers — but it's not for motor starts or heavy inductive kicks where a C or D curve would be needed. The 10 kA (EN 60898) and 20 kA (IEC 60947-2) breaking capacities cover most panelboard fault scenarios; the higher 20 kA figure under IEC 60947-2 is what matters for industrial switchgear where prospective fault current can be stiffer. The 4-pole 3P+N configuration with combined terminals top and bottom simplifies wiring in a 3-phase plus neutral distribution board — one conductor per pole, no separate neutral bar needed. IP20 with connected conductors is standard for enclosed panels; keep the gland plate sealed.
Thermal derating and environment
Rated current drops with ambient temperature: 13 A at 35°C, 12.22 A at 45°C, 11.95 A at 50°C, 11.67 A at 55°C, 11.39 A at 60°C. The -40°C to 75°C operating range covers outdoor cabinets in cold climates and warm machinery sheds.