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S203-C1 3P 1A

The ABB S203‑C1 is a 3‑pole miniature circuit breaker (MCB) from ABB’s S200/S200P series designed to provide overload and short‑circuit protection for low‑voltage electrical circuits. It uses thermal and electromechanical tripping mechanisms to interrupt current when an overload or fault occurs, protecting wiring and devices from damage.

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Key Specifications General Manufacturer: ABB Model / Part Number: S203‑C1 Product Type: 3‑pole miniature circuit breaker (MCB) Series: S200 series Trip Curve: C‑characteristic (general purpose) Poles: 3 poles (3P) Rated Current (In): 1 A (per pole) Modular Width: 3 modules (3 × 18 mm) Electrical Ratings Rated Operational Voltage (AC): 230/400 V AC (three‑phase system) Rated Insulation Voltage (Ui): ~440 V Rated Frequency: 50–60 Hz Thermal‑Magnetic Protection: Combined thermal overload and magnetic short‑circuit trip Breaking / Interrupting Capacity: Icu (ultimate): up to ~25 kA (IEC) at 230/400 V AC Ics (service): ~7.5–12.5 kA depending on test standards Current Limiting Class: 3 (limits let‑through energy during short bursts) Mechanical & Installation Mounting: DIN rail (TH35) mountable in distribution panels Terminal Type: Screw terminals suitable for solid and ferruled conductors Actuator/Handle: Black, sealable with ON/OFF indication Mechanical Endurance: ~20,000 cycles Electrical Endurance: ~20,000 AC cycles Operating Temperature: Approx. −25 °C to +55 °C Protection & Compliance Standards: IEC/EN 60898‑1, IEC/EN 60947‑2 (MCB isolation/protection standards) UL/CSA: Compliant versions applicable to regional markets