The 5SY4608-7CC is a Siemens SENTRON miniature circuit breaker — 4-pole (3P+N), C-curve, rated 8 A at AC.
DIN-rail fit and thermal profile
Ambient range is -40 to 75 °C, but humidity must be managed: max 95% RH up to 55 °C, then derated to 35% at 75 °C. If your furnace control cabinet sits near a kiln or melt zone, that 75 °C ceiling is the hard limit — and at that temperature the humidity envelope is tight.
Approvals and compliance documentation
Rated breaking capacity is 10 kA per EN 60898 and 5 kA per UL 1077 / CSA C22.2 No. 235 — so it carries both IEC and North American certification for the respective standards. The product designation per IEC 81346-2 and DIN EN 61346-2 is 'F' — the standard function code for circuit protection.