2CDS253001R0205 ABB SH203-B20 MCB 3P 20A B Curve 6kA DIN Rail

The ABB S203-B20 (article 2CDS253001R0205) is a 3-pole miniature circuit breaker from the S200 series, rated at 20 A with a B tripping characteristic and a 6 kA AC breaking capacity. It delivers two independent layers of overcurrent protection: a delayed thermal mechanism for sustained overloads and an electromechanical mechanism for short-circuit faults.

Technical specifications:

• Series: S203-B20
• ABB article number: 2CDS253001R0205
• EAN: 4016779469104
• Poles: 3P
• Rated current: 20 A
• Tripping characteristic: B
• Breaking capacity: 6 kA (AC) at 230/400 V AC

Features and benefits:

• Current limiting operation reduces the energy let-through during a fault, protecting connected equipment downstream.
• Separate thermal and electromechanical trip elements address overload and short-circuit conditions independently, giving precise and reliable response to each fault type.
• B tripping characteristic is suited to resistive and lightly inductive loads where low inrush currents are present.
• Bottom-fitting auxiliary contact can be added to save 50% space compared with side-mounted accessories, keeping panel layouts compact.
• Complies with IEC/EN 60898-1, IEC/EN 60947-2, and UL1077, supporting use across residential, commercial, and industrial installations.

Applications:

• Branch circuit protection in residential distribution boards and consumer units.
• 3-phase circuit protection in commercial switchgear and panel boards.
• Industrial control cabinet wiring where a 20 A B-characteristic breaker is required.
• Supplementary protection in machine and equipment control circuits.

Also known as: ABB S203-B20, S203-B20 2CDS253001R0205, ABB 3-pole 20 A MCB B characteristic, ABB miniature circuit breaker 20A, 2CDS253001R0205.