ABB s203-b40 mcb s200p 3 pole b type 40amp

Why Choose the ABB S203-B40 Miniature Circuit Breaker?

The ABB S203-B40 is a premium three-pole miniature circuit breaker (MCB) from the trusted ABB System pro M Compact S200 series. Featuring a 40 A current rating and a B tripping characteristic, it is designed to provide dependable protection against overloads and short circuits in residential, commercial and light industrial electrical installations. The B curve is ideal for protecting resistive loads and circuits with low inrush currents, ensuring rapid fault disconnection and reliable operation.

Manufactured to ABB's renowned engineering standards, the S203-B40 combines thermal overload protection with fast electromagnetic short circuit protection. Its compact DIN rail mounted design enables straightforward installation within distribution boards, switchgear and industrial control panels while providing long-term reliability.

Complying with internationally recognised standards including IEC/EN 60898-1, IEC/EN 60947-2 and UL 1077, the ABB S203-B40 is widely specified by electrical contractors, panel builders and OEM manufacturers for dependable three-phase circuit protection.

Key Advantages

• Three-pole miniature circuit breaker for three-phase electrical systems.
• 40 A rated current suitable for commercial and industrial applications.
• B tripping characteristic for low inrush current circuits.
• Reliable overload and short circuit protection.
• Compact DIN rail mounting for quick installation.
• Compatible with ABB System pro M Compact accessories.

Key Features

• ABB System pro M Compact S200 series.
• Model: S203-B40.
• 40 A rated current.
• Three protected poles (3P).
• B curve tripping characteristic.
• Thermal and electromagnetic trip mechanisms.
• 6 kA rated breaking capacity to IEC/EN 60898-1.
• DIN rail mounting for switchboards and control panels.

Technical Specifications

• Manufacturer: ABB
• Series: System pro M Compact S200
• Model: S203-B40
• Product ID: 2CDS253001R0405
• Product type: Miniature circuit breaker (MCB)
• Rated current: 40 A
• Number of poles: 3
• Tripping characteristic: B
• Rated operational voltage: 230/400 V AC
• Rated insulation voltage: 440 V AC
• Frequency: 50 / 60 Hz
• Breaking capacity: 6 kA
• Protection rating: IP20
• Mounting type: DIN rail
• Standards: IEC/EN 60898-1, IEC/EN 60947-2, UL 1077
• Dimensions (H × W × D): Approx. 88 × 52.5 × 69 mm
• Weight: Approx. 0.36 kg

Reliable Protection for General Electrical Distribution

The ABB S203-B40 safely disconnects electrical circuits during overloads and short circuits, helping protect wiring, switchgear and connected equipment. Its B characteristic provides fast tripping for resistive loads and circuits with low starting currents, making it ideal for lighting, heating and general power distribution applications.

As part of ABB's proven System pro M Compact range, the S203-B40 offers dependable performance, straightforward installation and compatibility with a comprehensive range of auxiliary contacts, signalling devices and shunt trips for complete electrical distribution solutions.

Typical Applications

• Commercial electrical distribution.
• Residential consumer units.
• Lighting circuits.
• Power distribution panels.
• Industrial control panels.
• OEM electrical equipment.

Trusted by Electrical Professionals Worldwide

ABB System pro M Compact miniature circuit breakers are trusted worldwide by electrical contractors, machine builders and industrial engineers for dependable overcurrent protection across residential, commercial and industrial installations.