ABB 2CDS253001R0405 S203-B40 3P 40A 6kA B-Curve DIN-Rail Miniature Circuit Breaker

The ABB S203-B40 miniature circuit breaker (MCB), SKU 2CDS253001R0405, is a 3-pole, 40A, B-curve device from the S200 series rated at 230/400V AC with a 6 kA breaking capacity — engineered for reliable overcurrent and short-circuit protection in residential, commercial, and light industrial distribution boards. Designed for fast DIN-rail installation, the S203-B40 delivers consistent performance across a wide range of applications where precise, dependable protection is critical.

Technical Specifications

Certifications & Standards

• IEC/EN 60898-1: International and European standard for household and similar circuit breakers for overcurrent protection
• IEC/EN 60947-2: International and European standard for low-voltage switchgear — circuit breakers
• UL 1077: UL standard for supplementary protectors for use in electrical equipment
• IEC 60898-1: IEC standard governing circuit breaker performance for household and similar applications
• EN 60898-1: European adoption of IEC 60898-1
• IEC/EN 60898-1400: Extended scope clause under IEC/EN 60898-1 for 400V applications
• IEC/EN 60947-2440: Extended scope clause under IEC/EN 60947-2 for 440V industrial applications
• IEC 60068-2: Environmental testing standard for robustness and reliability
• EN 60947-2: European low-voltage switchgear standard for circuit breakers
• EN 45555: European standard for general methods for assessing the energy efficiency of networked standby-capable products
• EN 60664: Insulation coordination standard for equipment within low-voltage systems
• CSA: Canadian Standards Association certification for North American market compliance
• CE: Conformité Européenne mark confirming compliance with EU directives
• UKCA: UK Conformity Assessed mark for Great Britain market compliance
• RoHS: Restriction of Hazardous Substances — free from restricted substances per EU Directive 2011/65/EU
• REACH: EU chemical regulation compliance ensuring safe use of substances
• WEEE: Waste Electrical and Electronic Equipment Directive compliance for responsible end-of-life disposal