ABB 2CDS631031R0634 BMS311C63 1P 63A 3kA Curve-C Miniature Circuit Breaker MCB Basic M BMS

The ABB BMS311C63 miniature circuit breaker (MCB), SKU 2CDS631031R0634, is a 1-pole 63 A Curve-C device from the Basic M BMS series, rated for 230 V AC per IEC 60898-1 and 440 V per IEC 60947-2, delivering a breaking capacity of 3 kA. Designed for reliable overcurrent and short-circuit protection in residential, commercial, and light-industrial control panel installations, the BMS311C63 offers a compact 17.5 mm wide footprint that makes efficient use of DIN rail space.

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 and controlgear — circuit breakers
• IEC/EN 60664-1: Insulation coordination for equipment within low-voltage supply systems
• IEC/EN 60664: Insulation coordination for low-voltage equipment
• EN 60664: European harmonised insulation coordination standard
• RoHS (EU Directive 2011/65/EU & Amendment 2015/863): Restriction of hazardous substances in electrical and electronic equipment
• REACH: EU regulation on registration, evaluation, authorisation and restriction of chemicals
• WEEE: EU Waste Electrical and Electronic Equipment Directive compliance
• TSCA: U.S. Toxic Substances Control Act compliance

Applications & Use Cases

• Overcurrent and short-circuit protection in residential distribution boards
• Commercial building electrical panels and sub-distribution boards
• Light-industrial control panels and machinery protection
• Single-phase branch circuit protection at 230 V AC
• Industrial automation cabinets requiring compact 17.5 mm-wide DIN rail MCBs