ABB 2CDS253001R0635 S203-B63 3P 63A 6kA B-Curve DIN-Rail Miniature Circuit Breaker

The ABB S203-B63 miniature circuit breaker (MCB), catalog number S203-B63 and SKU 2CDS253001R0635, is a 3-pole, 63 A, B-curve device rated at 230/400 V AC with a breaking capacity of 6 kA — engineered for reliable overcurrent and short-circuit protection in residential, commercial, and light-industrial distribution boards. Designed for tool-free DIN-rail installation, the S200 series offers compact 52.5 × 88 × 69 mm dimensions and a lightweight 0.36 kg profile, making it ideal for high-density control panels and switchboards.

Technical Specifications

Certifications & Standards

• IEC/EN 60898-1: Standard for circuit breakers for overcurrent protection in household and similar installations
• IEC/EN 60947-2: Standard for low-voltage switchgear — circuit breakers
• IEC 60898-1: International standard for miniature circuit breakers
• EN 60898-1: European harmonized standard for MCBs
• IEC/EN 60664: Insulation coordination for equipment within low-voltage systems
• IEC 60068-2: Environmental testing standard
• EN 60947-2: European standard for low-voltage circuit breakers
• EN 45555: General methods for the assessment of the ability to recover resources from electrical and electronic equipment
• EN 60664: European standard — insulation coordination for low-voltage equipment
• UL 1077: Standard for Supplementary Protectors for Use in Electrical Equipment (UL listed)
• CSA: Canadian Standards Association certified
• CE: Conformité Européenne — meets EU safety, health, and environmental requirements
• UKCA: UK Conformity Assessed — meets Great Britain market regulatory requirements
• RoHS: Restriction of Hazardous Substances — compliant with EU Directive 2011/65/EU
• REACH: Registration, Evaluation, Authorisation and Restriction of Chemicals compliant
• WEEE: Waste Electrical and Electronic Equipment Directive compliant