ABB 2CDS273001R0044 S203M-C4 3P 4A 10kA C-Curve Miniature Circuit Breaker

The ABB S203M-C4 miniature circuit breaker (SKU: 2CDS273001R0044) is a high-performance 3-pole MCB from the S200M series, rated at 4A with a 10kA breaking capacity at 230/400V AC and a C-curve tripping characteristic — ideal for protecting branch circuits and loads with moderate inrush currents in commercial and industrial installations. Compact at 52.5mm × 88mm × 69mm and weighing only 0.336 kg, the S203M-C4 fits neatly onto standard DIN rails in control panels, distribution boards, and switchgear enclosures.

Technical Specifications

Certifications & Standards

• IEC/EN 60898-1: International and European standard for circuit breakers for overcurrent protection in household and similar installations
• IEC/EN 60947-2: International and European standard for low-voltage switchgear — circuit breakers
• IEC 60898-1: IEC standard for circuit breakers for overcurrent protection
• EN 60898-1: European harmonised standard for miniature circuit breakers
• IEC/EN 60898: Combined IEC/EN standard for overcurrent circuit breakers
• IEC/EN60898: Equivalent designation for IEC/EN 60898 compliance
• IEC 60898-1400: IEC 60898-1 variant covering 400V rated breaking capacity
• IEC 60947-2440: IEC 60947-2 variant for 440V industrial switchgear applications
• IEC 60068-2: Environmental testing standard for climatic and mechanical robustness
• EN 60898: European standard for overcurrent circuit breakers
• EN 60947-2: European low-voltage switchgear and controlgear standard — circuit breakers
• EN 45555: European standard for end-of-life treatment of electrical and electronic equipment
• EN 60664: Insulation coordination standard for low-voltage equipment
• EN 60898: European standard for miniature circuit breakers, household and similar applications
• EN 60947: European standard for low-voltage switchgear and controlgear
• UL 1077: UL standard for supplementary protectors (miniature circuit breakers) for use in electrical equipment
• CSA: Canadian Standards Association approval for electrical safety in North American markets
• RoHS: Restriction of Hazardous Substances — compliant with EU Directive 2011/65/EU
• REACH: Compliant with EU REACH regulation (EC) No 1907/2006 on chemical safety
• WEEE: Compliant with EU Waste Electrical and Electronic Equipment Directive 2012/19/EU
• CE: Conforms to applicable European Union directives and regulations
• UKCA: UK Conformity Assessed marking for Great Britain market compliance

Applications & Use Cases

• Branch circuit protection in commercial and industrial distribution boards
• Motor and transformer circuit protection where moderate inrush (C-curve) is expected
• Control panel wiring protection in industrial automation and manufacturing
• Protection of lighting circuits, HVAC, and general-purpose loads in 400V AC systems
• Switchgear assemblies requiring IEC 60947-2 compliant overcurrent protection