DC-rated miniature circuit breaker for industrial control panels
The Siemens 5SY5206-6CC is a 2-pole SENTRON miniature circuit breaker rated for 440 V DC with a 10 kA DC breaking capacity per IEC 60947-2. The B tripping characteristic (3–5× In) is specified for the DC circuit, so the magnetic trip thresholds are calibrated for DC fault profiles, not AC. The 6 A rating at 35 °C is the reference point; per the datasheet, the continuous current derates to 5.32 A at 40 °C, 4.95 A at 45 °C, 4.55 A at 50 °C, and 4.1 A at 55 °C — the thermal curve governs real-world panel loading, not the 35 °C number alone. The quick assembly system means it snaps onto the rail without tools.
Environmental and compliance profile
The sealable design allows the panel builder to lock the toggle position with a padlock or wire seal, preventing unauthorized switching during maintenance lockout procedures. Operating temperature range spans -40 °C to 75 °C, with humidity influence specified: max 95% RH up to 55 °C, derating to 55% RH at 70 °C and 35% RH at 75 °C. Vibration resistance per IEC 60068-2-6 is ±1 mm at 5 to 25 Hz and 50 m/s² at 25 to 150 Hz — suitable for installation on machinery or conveyors with moderate vibration profiles.