ABB 2CDS633031R0634 BMS313C63 3P 63A 3kA C-Curve 400V AC Miniature Circuit Breaker

The ABB BMS313C63 miniature circuit breaker (SKU: 2CDS633031R0634) is a 3-pole, 63 A, C-curve MCB from the Basic M BMS series, rated at 400 V AC per IEC 60898-1 with a breaking capacity of 3 kA. Designed for reliable overcurrent and short-circuit protection in residential, commercial, and light-industrial control panels, the BMS313C63 combines compact dimensions (52.5 × 88 × 69 mm) with robust IEC-compliant performance, making it a dependable choice for distribution boards and motor branch circuits alike.

Technical Specifications

Certifications & Standards

• IEC 60898-1: Standard for circuit breakers for overcurrent protection in 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 for low-voltage equipment
• IEC 60898: General series standard for overcurrent protective circuit breakers
• IEC 60947: General series standard for low-voltage switchgear and controlgear
• 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: Waste electrical and electronic equipment directive compliance

Applications & Use Cases

• Overcurrent and short-circuit protection in residential and commercial distribution boards
• Branch circuit protection for lighting, heating, and general-purpose loads
• Motor branch circuit protection in light-industrial control panels
• Retrofit or upgrade of existing 3-pole MCB installations requiring IEC 60898-1 / IEC 60947-2 compliance
• Machine building and OEM panel assemblies requiring compact, DIN-rail-mounted protection devices