ABB 2CDS273001R0255 S203M-B25 3P 25A 10kA B-Curve 230/400V AC Miniature Circuit Breaker

The ABB S203M-B25 miniature circuit breaker (SKU: 2CDS273001R0255) is a 3-pole, 25A, B-curve MCB from the S200M series, rated at 230/400V AC with a breaking capacity of 10kA. Designed for residential and light commercial distribution boards, the S203M-B25 provides reliable overcurrent and short-circuit protection in a compact 52.5mm × 88mm × 69mm DIN-rail package weighing just 0.345kg.

Technical Specifications

Certifications & Standards

• IEC/EN 60898-1: Miniature circuit breakers for overcurrent protection in household and similar installations
• IEC/EN 60947-2: Low-voltage switchgear and controlgear — circuit breakers
• IEC 60898-1: International standard for miniature circuit breakers
• EN 60898-1: European harmonised standard for miniature circuit breakers
• IEC/EN 60898: General MCB performance and safety standard
• IEC/EN 60664: Insulation coordination for equipment within low-voltage systems
• IEC/EN 60664 (EN60664): Insulation coordination requirements
• IEC 60898-1400: Extended MCB testing standard
• IEC 60947-2440: Low-voltage switchgear extended performance
• IEC 60068-2: Environmental testing for electronic and electrical components
• EN 60898: European standard for circuit breakers in household installations
• EN 60947-2: European standard for low-voltage circuit breakers
• EN 45555: General methods for the assessment of the ability of energy-related products to be repaired, reused, and recycled
• EN 60664: Insulation coordination for low-voltage equipment
• EN 60947: Low-voltage switchgear and controlgear general requirements
• UL 1077: Supplementary protectors for use in electrical equipment
• CSA: Canadian Standards Association certified for North American markets
• CE: Conformité Européenne — meets all applicable EU directives
• UKCA: UK Conformity Assessed — meets Great Britain market requirements
• RoHS: Restriction of Hazardous Substances — compliant with EU Directive 2011/65/EU
• REACH: Compliant with EU REACH regulation (EC) No 1907/2006
• WEEE: Waste Electrical and Electronic Equipment Directive compliant

Applications & Use Cases

• Overcurrent and short-circuit protection in residential and light commercial distribution boards
• Protection of lighting and socket outlet circuits in control panels
• Industrial automation control panel protection at 400V AC three-phase systems
• Building automation and HVAC electrical distribution
• DIN-rail mounted installations requiring a compact, high-performance 3-pole MCB