ABB 2CDS251001R0505 S201-B50 1P 50A 6kA Type-B Miniature Circuit Breaker MCB

The ABB S201-B50 miniature circuit breaker (MCB), SKU 2CDS251001R0505, is a 1-pole 50A Type-B device rated at 230/400V AC with a 6kA breaking capacity — engineered for reliable overcurrent and short-circuit protection in residential, commercial, and light industrial control panels. Part of ABB's trusted S200 series, the S201-B50 mounts directly onto standard DIN rail and complies with IEC/EN 60898-1 and IEC/EN 60947-2 for globally recognised performance assurance.

Technical Specifications

Certifications & Standards

• IEC/EN 60898-1: Household and similar installations — circuit breakers for overcurrent protection
• IEC/EN 60947-2: Low-voltage switchgear and controlgear — circuit breakers (industrial application)
• IEC 60898-1: International standard for miniature circuit breakers in household applications
• EN 60898-1: European harmonised standard for MCBs
• IEC 60898-1230: Extended compliance variant of IEC 60898-1
• IEC 60068-2: Environmental testing for electronic and electrical components
• EN 60947-2: European standard for industrial circuit breakers
• EN 45555: General methods for the assessment of the energy efficiency of networked standby-related products
• EN 60664: Insulation coordination for equipment within low-voltage systems
• UL 1077: Supplementary Protectors for Use in Electrical Equipment (UL/CSA North American market)
• CSA: Canadian Standards Association certification for North American compliance
• CE: European Conformity marking — meets EU safety, health, and environmental requirements
• UKCA: UK Conformity Assessed marking for Great Britain market access
• RoHS: Restriction of Hazardous Substances — compliant with EU Directive 2011/65/EU
• REACH: Registration, Evaluation, Authorisation and Restriction of Chemicals (EU regulation)
• WEEE: Waste Electrical and Electronic Equipment Directive compliance

Applications & Use Cases

• Overcurrent and short-circuit protection in residential distribution boards
• Commercial building final circuits and sub-distribution panels
• Light industrial control panels and machine electrical enclosures
• Protection of cables and wiring in automation systems
• DIN-rail mounted switchgear assemblies in compact enclosures