ABB 2CDS631031R0635 BMS311B63 1P 63A 3kA B-Curve 230V AC Miniature Circuit Breaker

The ABB BMS311B63 miniature circuit breaker (SKU: 2CDS631031R0635) is a 1-pole, 63 A, 3 kA breaking capacity MCB from the Basic M BMS series, designed for reliable overcurrent and short-circuit protection in residential and light commercial installations. Rated at 230 V AC per IEC 60898-1 and 440 V AC per IEC 60947-2, the BMS311B63 offers compact B-curve protection in a slim 17.5 mm wide DIN-rail housing suitable for space-constrained control panels.

Technical Specifications

Certifications & Standards

• IEC 60898-1: Standard for circuit breakers for overcurrent protection for household and similar installations
• IEC 60947-2: Standard for low-voltage switchgear — circuit breakers for industrial applications
• IEC/EN 60664-1: Insulation coordination for equipment within low-voltage systems
• IEC/EN 60664: Insulation coordination standard compliance
• IEC 60898: General circuit breaker performance standard
• EN 60664: European harmonised insulation coordination standard
• CB Certificate (IEC 60898): International CB scheme certification for circuit breakers
• RoHS (EU Directive 2011/65/EU & Amendment 2015/863): Restriction of hazardous substances in electrical and electronic equipment
• REACH: Compliance with EU REACH regulation on chemical substances
• WEEE: Compliance with EU Waste Electrical and Electronic Equipment directive

Applications & Use Cases

• Overcurrent and short-circuit protection in residential distribution boards
• Light commercial and industrial control panel circuit protection
• Final circuit protection for lighting and socket outlet circuits
• DIN-rail mounted installations requiring compact 17.5 mm single-pole breakers
• Applications requiring IEC 60947-2 rated devices up to 440 V AC