ABB 2CDS271001R0505 S201M-B50 1P 50A 10kA B-Curve 230/400V AC Miniature Circuit Breaker

The ABB S201M-B50 miniature circuit breaker (MCB), SKU 2CDS271001R0505, is a single-pole 50 A device from the S200M series, delivering 10 kA breaking capacity at 230/400 V AC with a B-curve trip characteristic. Designed for overload and short-circuit protection in residential, commercial, and light-industrial distribution boards, the S201M-B50 combines a compact 17.5 mm width with robust IEC/EN 60898-1 performance — making it a reliable choice for engineers and panel builders who demand proven protection in a space-efficient format.

Technical Specifications

Certifications & Standards

• IEC/EN 60898-1: International and European standard for circuit breakers for overcurrent protection in household and similar installations
• IEC 60898-1: IEC edition of the MCB overcurrent protection standard
• EN 60898-1: European harmonised edition of the MCB overcurrent protection standard
• IEC/EN60898: Combined IEC/EN designation for MCB performance and safety
• EN60898: European standard for miniature circuit breakers in household and similar applications
• IEC/EN 60947-2: International and European standard for low-voltage switchgear — circuit breakers
• EN60947-2: European harmonised standard for low-voltage circuit breakers
• EN60947: European standard series for low-voltage switchgear and controlgear
• IEC 60068-2: Environmental testing standard for mechanical and climatic robustness
• EN45555: European standard for end-of-life treatment of electrical and electronic equipment
• EN60664: Insulation coordination standard for equipment within low-voltage systems
• UL 1077: UL standard for supplementary protectors (USA market)
• CSA: Canadian Standards Association certification
• CE: European Conformity marking — meets EU safety, health, and environmental requirements
• UKCA: UK Conformity Assessed marking for the Great Britain market
• RoHS: Restriction of Hazardous Substances — compliant with EU Directive 2011/65/EU
• REACH: Compliant with EU REACH regulation on chemical substance safety
• WEEE: Compliant with EU Waste Electrical and Electronic Equipment Directive

Applications & Use Cases

• Overload and short-circuit protection in residential and commercial distribution boards
• Branch circuit protection in light-industrial control panels
• Final circuit protection in building services installations up to 230/400 V AC
• Applications requiring B-curve characteristics for resistive or slightly inductive loads
• DIN rail mounted installations where 17.5 mm module width is required