The Siemens SENTRON 5SY4615-7 is a 4-pole (3P+N) miniature circuit breaker rated at 1.6 A with a C tripping characteristic, designed for 400 V AC systems.
The C-curve means magnetic trip occurs at 5–10× In. In a panel with a transformer rating above 630 kVA or a utility feed capable of 25 kA, the 35 kA rating under IEC 60947-2 is what keeps the breaker from failing open under a fault — design to that value for industrial installations. Useful for control circuits or battery-backed loads, but verify polarity and the DC derating curve if used at elevated ambient temperatures. Humidity tolerance up to 95% at 55 °C, derating to 35% at 75 °C. Conductor cross-section: solid 0.75–35 mm², stranded 0.75–35 mm².
The 5SY4615-7 is halogen-free and silicon-free, important for applications sensitive to outgassing (e.g., clean rooms, sealed enclosures near sensitive electronics). Overvoltage category III, pollution degree unspecified but standard for industrial MCBs. Energy limiting class 3 — limits let-through energy under fault conditions, protecting downstream equipment. Design classification per DIN EN 61346-2 and DIN EN 81346-2 is letter F — the standard function code for protective devices. Compliance documentation (RoHS, REACH, CE) is standard for the SENTRON series; specific certificates are available on request at quote time.