ABB 2CDS251001R0325 S201-B32 1P 32A 6kA B-Curve DIN-Rail Miniature Circuit Breaker

The ABB S201-B32 miniature circuit breaker (SKU: 2CDS251001R0325) is a 1-pole, 32 A, B-curve MCB from the S200 series, rated at 230/400 V AC with a breaking capacity of 6 kA per IEC/EN 60898-1. Designed for DIN-rail mounting in residential, commercial, and light industrial distribution boards, the S201-B32 provides reliable overcurrent and short-circuit protection with a compact 17.5 mm wide profile.

Technical Specifications

Certifications & Standards

• IEC/EN 60898-1: International and European standard for household and similar installations MCBs
• IEC/EN 60947-2: International and European standard for low-voltage switchgear circuit breakers
• IEC 60898-1: IEC standard for overcurrent protection of household and similar installations
• EN 60898-1: European harmonised standard for miniature circuit breakers
• EN 60947-2: European standard for low-voltage switchgear and controlgear circuit breakers
• IEC 60898-1230: Supplementary IEC standard designation for MCB applications
• IEC 60068-2: Environmental testing standard for durability and reliability
• EN45555: General methods for assessing the ability of energy-related products to be repaired and recycled
• EN 60664: Insulation coordination for equipment within low-voltage systems
• UL 1077: UL standard for supplementary protectors for use in electrical equipment (North America)
• CSA: Canadian Standards Association approval for use in North American markets
• CE: Conformité Européenne — complies with applicable EU directives
• UKCA: UK Conformity Assessed — complies with applicable UK regulations post-Brexit
• RoHS: Restriction of Hazardous Substances — free from restricted hazardous materials
• REACH: Compliance with EU chemical safety regulation
• WEEE: Waste Electrical and Electronic Equipment directive compliance

Applications & Use Cases

• Overcurrent and short-circuit protection in residential distribution boards
• Commercial building final circuit protection up to 32 A
• Light industrial control panels and machine wiring
• Protection of resistive and slightly inductive loads (B-curve: trips at 3–5× In)
• DIN-rail mounted consumer unit and sub-board installations
• Feeder circuit protection in automation and control cabinets

Frequently Asked Questions

What does the "B" curve mean on the S201-B32?
The B trip curve means the breaker trips instantaneously at 3–5 times the rated current (3–5× 32 A = 96–160 A). This is ideal for resistive loads such as lighting circuits, heating elements, and cable protection where low inrush currents are expected.

Is the ABB S201-B32 compatible with ABB auxiliary contacts and residual current blocks?
Yes. The S200 series is designed to accept a wide range of ABB accessories including auxiliary contacts, shunt trips, undervoltage releases, and residual current blocks (RC2xx series), enabling flexible system configurations.

Can the S201-B32 be used in a 400 V three-phase system?
As a 1-pole breaker, the S201-B32 protects a single phase conductor. It is rated at 230/400 V AC, making it suitable for use within a 400 V TN or TT three-phase system to protect individual phase conductors.