ABB 2CDS273001R0504 S203M-C50 3P 50A 10kA C-Curve Miniature Circuit Breaker

The ABB S203M-C50 miniature circuit breaker (SKU: 2CDS273001R0504) is a high-performance 3-pole MCB from the S200M series, rated at 50A with a 10kA breaking capacity at 230/400V AC and a type C tripping characteristic. Designed for industrial control panels and distribution boards, the S203M-C50 provides reliable overcurrent and short-circuit protection for motor and transformer circuits where moderate inrush currents are expected.

Technical Specifications

Certifications & Standards

• IEC/EN 60898-1: International and European standard for household and similar installations MCBs
• IEC/EN 60947-2: Industrial low-voltage circuit breakers standard
• UL 1077: Supplementary protectors for use in electrical equipment (UL/CSA)
• CSA 22.2 No. 235: Canadian Standards Association supplementary protectors
• IEC 60898-1: MCB performance and safety requirements
• EN 60898-1: European harmonised MCB standard
• IEC/EN 60898: General series compliance for circuit breakers
• IEC 60898-1400: MCB extended testing requirement
• IEC 60947-2440: Industrial circuit breaker supplementary testing
• IEC 60068-2: Environmental testing standard for electrical equipment
• EN 60898: European MCB safety standard
• EN 60947-2: European low-voltage switchgear and controlgear
• EN 45555: General methods for the assessment of the ability to recover resources from electrical and electronic equipment
• EN 60664: Insulation coordination for equipment in low-voltage systems
• EN 60898: European standard for MCBs in household and similar installations
• EN 60947: European standard series for low-voltage switchgear and controlgear
• UL 1077: Supplementary protector listing for North American markets
• CSA: Canadian Standards Association certification
• RoHS: Restriction of Hazardous Substances — compliant with EU Directive 2011/65/EU
• REACH: EU chemical safety regulation compliance
• WEEE: Waste Electrical and Electronic Equipment Directive compliance
• CE: Conformité Européenne — meets EU safety, health and environmental requirements
• UKCA: UK Conformity Assessed — approved for sale in Great Britain post-Brexit

Applications & Use Cases

• Industrial control panels and motor distribution boards
• Overcurrent and short-circuit protection for 3-phase loads up to 50A
• Protection of transformer secondary circuits with moderate inrush (type C curve)
• Commercial building electrical distribution systems
• Automation and machinery electrical protection in IEC-compliant installations