2-pole D-curve miniature circuit breaker for industrial load protection
The 5SY4208-8: Rated for mechanical engineering and industrial environments, with an ambient temperature range of -40 °C to 75 °C and vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz.
Production status and compliance documentation
The part carries a current lifecycle status, so it is a standard lead-time item available against an RFQ. Design-validation documentation covers IEC/EN 60898-1, IEC/EN 60947-2, and UL 1077; the housing is halogen-free and silicon-free to support compliance declarations. Overvoltage category III and pollution degree 3 suit distribution panels. The sealable design allows tamper-proof installation where required.
Panel integration and mounting
The 76 mm depth and 70 mm installation depth match standard SENTRON panel cutouts. IP20 protection with connected conductors keeps the busbar area clean in industrial enclosures. Combined top and bottom terminals accept supply from either side, simplifying wiring order. Neutral conductor is not switched; this is a 2-pole MCB switching both phases only. Humidity derating applies per: max 95% RH at 55 °C, 55% at 70 °C, 35% at 75 °C.