ABB 2CDS253001R0165 S203-B16 3P 16A 6kA Type-B Miniature Circuit Breaker (MCB)

The ABB S203-B16 miniature circuit breaker (MCB), SKU 2CDS253001R0165, is a 3-pole Type-B 16A device from the S200 series engineered for reliable overcurrent and short-circuit protection in residential, commercial, and light industrial control panel applications. Rated at 230/400V AC with a breaking capacity of 6 kA, the S203-B16 offers dependable DIN-rail installation in a compact 52.5 × 88 × 69 mm footprint weighing just 0.345 kg.

Technical Specifications

Certifications & Standards

• IEC/EN 60898-1: International and European standard for circuit breakers for overcurrent protection in household and similar installations
• IEC/EN 60947-2: International and European standard for low-voltage switchgear — circuit breakers
• UL 1077: Standard for supplementary protectors for use in electrical equipment
• IEC 60898-1: International standard for circuit breakers for overcurrent protection
• EN 60898-1: European standard for circuit breakers for overcurrent protection
• IEC 60898-1 400: Variant rating under IEC 60898-1 standard
• IEC 60947-2 440: Variant rating under IEC 60947-2 standard
• IEC 60068-2: Environmental testing standard for electrical and electronic components
• EN 60947-2: European standard for low-voltage switchgear and controlgear — circuit breakers
• EN 45555: European standard for energy-related products — general methods for assessing the ability to repair, reuse, upgrade, and recycle
• EN 60664: Insulation coordination for equipment within low-voltage systems
• CSA: Canadian Standards Association approval for electrical equipment
• RoHS: Restriction of Hazardous Substances — compliant with EU Directive 2011/65/EU
• REACH: Compliant with EU Regulation (EC) No 1907/2006 on chemical substances
• WEEE: Compliant with EU Waste Electrical and Electronic Equipment Directive
• CE: Conformité Européenne — meets EU health, safety, and environmental requirements
• UKCA: UK Conformity Assessed — meets Great Britain market requirements post-Brexit

Applications & Use Cases

• Overcurrent and short-circuit protection in residential distribution boards
• Control panel protection in light commercial and industrial installations
• Branch circuit protection for motors, lighting, and general purpose loads with low inrush (Type B characteristic)
• DIN-rail mounted 3-pole protection for 3-phase 400V AC circuits
• Industrial automation control cabinets requiring IEC/EN 60947-2 rated devices