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. It carries a 10 kA breaking capacity per EN 60898 and a 35 kA rating per IEC 60947-2, giving you headroom for high-fault-current industrial panels. The C-curve (tripping between 5 and 10 times rated current) suits it for moderate inrush loads — think motor starters, contactor coils, or small transformer primaries — in mechanical engineering and industrial environments. Mounts in any position using the quick-assembly system (standard DIN-rail clip), occupies 4 width units (72 mm), and is sealable for anti-tamper applications. The IP20 rating applies with connected conductors; touch protection is built in.
Key Ratings & What They Mean for Fit
Rated 1.6 A at 400 V AC. The C-curve means magnetic trip occurs at 5–10× In. Breaking capacity: 10 kA per EN 60898 (the household/industrial standard) and 35 kA per IEC 60947-2 (the industrial standard for higher fault currents). 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. For DC circuits, the 5SY4615-7 is rated up to 72 V DC with a 15 kA breaking capacity per IEC 60947-2. Useful for control circuits or battery-backed loads, but verify polarity and the DC derating curve if used at elevated ambient temperatures. Ambient temperature range -40 to +70 °C, storage -40 to +75 °C — covers outdoor enclosures in cold climates and warm machine cabinets. 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 combined terminal top and bottom accept a wide range of wire sizes, simplifying panel wiring with mixed cable gauges.
Compliance & Documentation
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.