Siemens SENTRON 5SY5210-6CC — B-Curve 10 A DC MCB
This is an active-production part, specified for panel building and industrial control where selective coordination and reliable overcurrent protection are required.
DC Ratings and Breaking Capacity
This makes it suitable for DC bus protection in drives, UPS systems, or solar combiner boxes where fault currents can reach that level. The B-curve (3-5 In) trips fast on moderate overloads, so it pairs well with resistive or electronic loads that don't draw high inrush.
Rated current derates with ambient temperature: 9.32 A at 40 °C, 8.96 A at 45 °C, 8.58 A at 50 °C, and 8.19 A at 55 °C. The device operates across -40 °C to 75 °C, with humidity limits of 95% up to 55 °C, 55% up to 70 °C, and 35% at 75 °C. This wide range covers unheated enclosures in cold climates and hot cabinet interiors near transformers or drives.
IP20 with connected conductors; touch protection is built in. Sealable for tamper-proofing in metering or critical circuits.
Construction and Compliance
Halogen-free and silicon-free construction. Vibration resistance per IEC 60068-2-6: ±1 mm at 5-25 Hz, 50 m/s² at 25-150 Hz. Combined terminals on top and bottom simplify busbar and cable connections. No neutral conductor switching — this is a 2-pole device for DC or phase + phase protection. Designation per IEC 81346-2 and DIN EN 61346-2 is F (protective device).
Marked as current-production. No official successor has been issued — this remains the active order code for new builds and spares.