SENTRON 5SY7406-7CC — 4-pole C-curve MCB, 6 A, 30 kA
The Siemens 5SY7406-7CC is a SENTRON miniature circuit breaker with a 4-pole design and C tripping characteristic, rated 6 A at 35 °C and 400 V AC multi-phase.
Thermal derating and ambient limits
Rated 6 A at 35 °C, the 5SY7406-7CC derates to 5.67 A at 40 °C, 5.5 A at 45 °C, 5.32 A at 50 °C, and 5.13 A at 55 °C. This means a panel running at 50 °C ambient loses roughly 11 % of the nominal rating — factor that into the load schedule if the breaker sits near heat sources or in a sealed enclosure. Operating range spans -40 °C to 75 °C, with humidity limits of 95 % up to 55 °C, 55 % up to 70 °C, and 35 % at 75 °C.
IP20 with connected conductors; sealable for tamper-proof installations. Halogen-free and silicon-free construction.