Siemens 5SY7410-7 — 4-pole C-curve MCB for panel builders
Rated operational voltage is 400 VAC (440 V max single- or multi-phase), with a DC rating of 60 V (72 V max) for control-circuit applications. The 4-pole configuration switches all three phases plus the neutral; note that the neutral conductor is not switched (solid neutral pass-through), so this MCB is not suited for TN-S or TT schemes requiring a switched neutral. Halogen-free and silicon-free construction suits environments sensitive to outgassing — clean rooms, medical, or food-processing zones.
Breaking capacity — what the dual rating means for your panel
The 15 kA rating under EN 60898-1 is the standard residential/commercial MCB test; the 30 kA under IEC 60947-2 is the industrial counterpart, tested with a higher power factor and different make-break sequence. The UL 1077 rating of 5 kA (supplementary protector classification) covers North American installations where the device is not the sole branch-circuit overcurrent device. Energy limitation class 3 means the breaker limits let-through energy below 3 (I²t) thresholds — fast enough to protect downstream wiring and devices during a short circuit.
Integration — panel fit and environmental limits
Installation depth is 70 mm (76 mm overall depth), fitting standard 80 mm deep enclosures. Ambient temperature range spans -40 °C to 75 °C, with humidity derating: 95% RH up to 55 °C, 55% RH at 70 °C, 35% RH at 75 °C. The quick-assembly system clips onto the DIN rail without tools. Supply cord position is any (line or load from either end), simplifying wiring in tight enclosures.