ABB 2CDS273001R0325 S203M-B32 3P 32A 10kA B-Curve Miniature Circuit Breaker

The ABB S203M-B32 (SKU: 2CDS273001R0325) is a 3-pole 32A B-curve miniature circuit breaker from the S200M series, rated at 230/400 V AC with a 10 kA breaking capacity. Designed for reliable overcurrent and short-circuit protection in industrial control panels, distribution boards, and building automation systems, the S203M-B32 meets the highest international standards including IEC/EN 60898-1 and IEC/EN 60947-2, making it a trusted choice for engineers and procurement professionals worldwide.

Technical Specifications

Certifications & Standards

• IEC/EN 60898-1: International/European standard for household and similar circuit breakers
• IEC/EN 60947-2: International/European standard for low-voltage switchgear — circuit breakers
• IEC 60898-1: IEC standard for overcurrent protection for household and similar installations
• EN 60898-1: European harmonised standard for miniature circuit breakers
• IEC/EN60898: Combined IEC/EN compliance for MCB performance requirements
• IEC 60898-1400: Extended IEC compliance for MCB at 400 V rating
• IEC 60947-2440: Extended IEC compliance for low-voltage circuit breakers at 440 V
• IEC 60068-2: Environmental testing standard for electrical components
• EN60898: European standard for circuit breaker safety and performance
• EN60947-2: European standard for low-voltage switchgear circuit breakers
• EN45555: General methods for the assessment of the ability of energy-related products to be repaired, reused, and recycled
• EN60664: Insulation coordination for equipment within low-voltage systems
• EN60947: Low-voltage switchgear and controlgear — general rules
• UL1077: UL standard for supplementary protectors for use in electrical equipment
• CSA: Canadian Standards Association certification for electrical safety
• RoHS: Restriction of Hazardous Substances — compliant with EU Directive 2011/65/EU
• REACH: EU chemical safety regulation compliance (ECHA SVHC)
• WEEE: Waste Electrical and Electronic Equipment Directive compliance
• CE: European Conformity marking — meets all applicable EU directives
• UKCA: UK Conformity Assessed marking for Great Britain market access

Applications & Use Cases

• Overcurrent and short-circuit protection in industrial control panels and distribution boards
• Protection of motors, lighting circuits, and resistive loads requiring B-curve characteristics
• Building automation, commercial electrical installations, and HVAC system protection
• Machine building and OEM equipment where compact DIN rail mounting is required
• Applications requiring dual compliance with IEC and EN standards for international project specifications

Frequently Asked Questions

What is the difference between the S203M-B32 and a standard S200 series MCB?
The S200M series is designed for higher breaking capacity (10 kA at 400 V AC) in a compact form factor, making it suitable for more demanding industrial environments compared to the standard S200 series.

What does the B-curve mean for this circuit breaker?
The B trip curve means the breaker trips magnetically at 3–5× the rated current. It is ideal for protecting resistive loads, long cable runs, and sensitive equipment where low inrush currents are expected.

Is the ABB S203M-B32 DIN rail mountable?
Yes, the S203M-B32 is designed for standard 35 mm DIN rail mounting, enabling easy installation in control panels and distribution boards.