ABB 2CDS253001R0805 S203-B80 3P 80A 6kA B-Curve Miniature Circuit Breaker

The ABB S203-B80 miniature circuit breaker (SKU: 2CDS253001R0805) is a 3-pole, 80 A, B-curve MCB from the ABB S200 series, rated at 400 V AC with a breaking capacity of 6 kA — delivering reliable overcurrent and short-circuit protection for industrial control panels, distribution boards, and commercial electrical installations. Mounting is fast and tool-free on standard DIN rail per DIN 43880, and the compact 52.5 × 88 × 69 mm footprint keeps panel designs tight and efficient.

Technical Specifications

Certifications & Standards

• IEC 60898-1: Household and similar installations — circuit breakers for overcurrent protection
• EN 60898-1 / IEC/EN 60898-1: European harmonised standard for miniature circuit breakers
• IEC 60898: General MCB performance and testing standard
• IEC 60947-2 / IEC/EN 60947-2 / EN 60947-2: Low-voltage switchgear — circuit breakers for industrial applications
• IEC/EN 60664-1 / EN 60664: Insulation coordination for low-voltage equipment
• IEC 60068-2: Environmental testing (vibration, temperature, humidity)
• CE: Conforms to EU Low Voltage Directive and EMC Directive requirements
• UKCA: UK Conformity Assessed marking for Great Britain market
• RoHS: Restriction of Hazardous Substances — compliant for EU/UK markets
• REACH: EU chemical safety regulation compliance
• WEEE: Waste Electrical and Electronic Equipment Directive compliant

Applications & Use Cases

• Overcurrent and short-circuit protection in industrial control panels and motor control centres
• Distribution board protection in commercial and light industrial buildings
< li>Branch circuit protection for resistive and low-inductive loads (B-curve: trip range 3–5× In)
• Protection of cables and conductors in automation and process control systems
• Use in low-voltage switchgear assemblies compliant with IEC 60947-2

Frequently Asked Questions

• What is the breaking capacity of the ABB S203-B80? The S203-B80 has a rated breaking capacity (Icu) of 6 kA at 400 V AC, suitable for most industrial distribution applications.
• What trip curve does the S203-B80 use? The B-curve trips at 3–5× the rated current, making it ideal for resistive loads and long cable runs where low magnetisation currents are expected.
• Is the ABB 2CDS253001R0805 DIN rail mountable? Yes — the S203-B80 mounts on standard 35 mm DIN rail in accordance with DIN 43880.
• What standards certify the S203-B80? It is certified to IEC 60898-1, IEC 60947-2, CE, UKCA, RoHS, REACH, and WEEE among others.