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S203-C100 3P 100A

The ABB S203‑C100 is a three‑pole miniature circuit breaker (MCB) designed for overload and short‑circuit protection of electrical circuits in residential, commercial, and light industrial installations. It features a type C tripping characteristic, making it suitable for circuits with moderate inrush currents such as lighting, small motors, and general power distribution. The breaker is intended for DIN‑rail mounting and can be used to safely interrupt fault currents while protecting conductors and connected equipment.

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Key Technical Parameters General & Electrical Ratings Product / Model: ABB S203‑C100 Rated Current (In): 100 A Number of Poles: 3 (three‑pole) Tripping Characteristic: Type C (moderate inrush tolerance) Rated Operational Voltage: Up to 400 V AC (max ~440 V) Rated Insulation Voltage (Ui): ~440 V Rated Frequency: 50 Hz / 60 Hz Standards Compliance: IEC/EN 60898‑1, IEC/EN 60947‑2 Degree of Protection: IP20 (housing) Breaking Capacity Rated Ultimate Short‑Circuit Breaking Capacity (Icu): ~10 kA at 230 V AC ~6 kA at 400 V AC Rated Service Short‑Circuit Breaking Capacity (Ics): ~6 kA at 400 V AC Rated Conditional Short‑Circuit Current (Icn): ~6 kA at 400 V AC Performance & Durability Power Loss: ~~29.4 W total (~9.8 W per pole) at rated conditions Electrical Endurance: ~10,000 switching cycles Mechanical Endurance: ~20,000 operations Energy Limiting Class: 3 Operating Temperature: Approx. −25 °C to +55 °C (typical) Mechanical & Installation Mounting Type: DIN‑rail Terminal Type: Screw, bi‑directional or failsafe cylinder‑lift type Connectable Conductors: Solid: ~2.5–50 mm² Flexible: ~4–35 mm² Connecting Capability: Busbar ~16 mm² Width: ~52.5 mm Depth: ~69 mm Height: ~88 mm Weight: ~0.42 kg Applications Protection of branch circuits and feeders in three‑phase systems Used in distribution panels for lighting, motor circuits, and general power distribution Suitable where moderate inrush currents occur (type C curve)