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1SDA050877R1

the ABB 1SDA050877R1This is a low‑voltage three‑pole molded case circuit breaker designed for electrical protection in power distribution systems. It combines thermal (overload) and magnetic (short‑circuit) protection in one unit and is suited for industrial, commercial, and building installations. It is a fixed‑type breaker with screw‑type cable connections at the front.

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Technical Parameters Parameter Specification Rated Uninterrupted Current (Iu) 80 A Rated Current Setting Range (Thermal) 56 A – 80 A Number of Poles 3 Rated Operational Voltage Up to 690 V AC Rated Insulation Voltage (Ui) 800 V Rated Impulse Withstand Voltage (Uimp) 8 kV Rated Ultimate Short‑Circuit Breaking Capacity (Icu) 16 kA at 380–415 V AC Rated Service Short‑Circuit Breaking Capacity (Ics) 16 kA at 380–415 V AC Connection Type Front terminals (for copper cables up to ~70 mm²) Mechanical Durability ~25,000 operations Electrical Durability ~8,000 operations Trip Unit Type Thermomagnetic (overload + instantaneous magnetic) Terminal Cable Size Up to ~70 mm² Cu Standards Compliance IEC 60947‑2