Siemens SENTRON 5SY5410-6 — 4-Pole B-Curve MCB for Universal Current
It's rated for universal current (AC/DC), making it suitable for both power-distribution and DC-load circuits in control panels. Breaking capacity is 10 kA per IEC/EN 60898-2 and 15 kA per IEC 60947-2 — the higher figure under 60947-2 matters when the breaker is used as a branch-circuit protective device in an industrial panel, not just a final-subcircuit MCB. Rated operational voltage is 400 V AC (multi-phase or single-phase) and 880 V DC. Maximum DC voltage goes to 1 000 V, but the DC polarity must be observed per the manufacturer's note — the breaker is not polarity-independent on DC.
The 10 kA SCCR under EN 60898-2 covers the vast majority of commercial and light-industrial final circuits. The 15 kA rating under IEC 60947-2 gives headroom for higher-fault installations when the breaker is applied as a branch-circuit device per that standard. The 4-pole design switches all live conductors but does not switch the neutral (Neutral Conductor Switching: No). That means the neutral is solidly connected through — fine for TN and TT systems where neutral is bonded to earth; not for IT systems requiring switched neutral. Temperature range is -40 °C to 75 °C, with humidity derating: max 95% RH up to 55 °C, then 55% up to 70 °C, and 35% up to 75 °C. If the panel runs hot and humid, stay below 55 °C to avoid nuisance tripping from condensation. Sealable (yes) — important for installations requiring tamper-proof locking after commissioning.
Compliance documentation includes IEC/EN 60898-2 and UL1077 approvals. The dual standard listing means it's accepted in both IEC and UL jurisdictions — useful for export panels or multi-national projects.