ABB 2CDS633031R0205 BMS313B20 3P 20A 3kA 400V AC B-Curve Miniature Circuit Breaker

The ABB BMS313B20 (SKU: 2CDS633031R0205) is a 3-pole 20 A B-curve miniature circuit breaker from the Basic M BMS series, rated at 400 V AC with a breaking capacity of 3 kA per IEC 60898-1. Designed for compact residential and light commercial distribution boards, the BMS313B20 delivers reliable overcurrent and short-circuit protection in a slim 52.5 mm-wide, DIN-rail-mount format — making it an ideal choice for engineers and panel builders seeking cost-effective, standards-compliant circuit protection.

Technical Specifications

Certifications & Standards

• IEC 60898-1: Rated and tested as a household and similar installation circuit breaker
• IEC 60947-2: Compliant as an industrial low-voltage circuit breaker (440 V AC rating)
• IEC/EN 60664-1: Insulation coordination for low-voltage equipment
• IEC/EN 60664: General insulation coordination standard compliance
• IEC 60898: Core circuit-breaker performance standard compliance
• IEC 60947: Low-voltage switchgear and controlgear standard family
• EN 60664: European harmonised insulation coordination standard
• CE: Conformité Européenne — meets all applicable EU directives
• RoHS: Restriction of Hazardous Substances — compliant, free of restricted materials
• REACH: Registration, Evaluation, Authorisation and Restriction of Chemicals — compliant
• TSCA: Toxic Substances Control Act — compliant for US market
• WEEE: Waste Electrical and Electronic Equipment directive — registered and compliant

Applications & Use Cases

• Overcurrent and short-circuit protection in residential distribution boards
• Light commercial and industrial control panel circuit protection
• Branch circuit protection for lighting and general-purpose loads
• DIN-rail-mount installations requiring compact 3-pole switching
• Applications demanding IEC 60898-1 and IEC 60947-2 dual compliance