ABB 2CSR255080R1254 DS201 C25 AC30 1P+N 25A 10kA RCBO Residual Current Circuit Breaker with Overcurrent Protection

The ABB DS201 C25 AC30 (SKU: 2CSR255080R1254) is a 1P+N Residual Current Circuit Breaker with Overcurrent Protection (RCBO) rated at 25 A with a 10 kA breaking capacity, delivering combined earth fault and overcurrent protection in a single compact device. Designed for installation in residential, commercial, and light industrial distribution boards, the DS201 C25 AC30 provides reliable personnel and equipment protection against both ground leakage currents and short-circuit/overload conditions. Weighing just 0.225 kg, this ABB RCBO integrates seamlessly onto standard DIN rail assemblies, simplifying panel design and reducing wiring complexity.

Technical Specifications

Applications & Use Cases

• Residential Distribution Boards: Protects final circuits in homes and apartments against both overcurrent and earth leakage faults in a single module.
• Commercial Installations: Ideal for office buildings, retail outlets, and hospitality environments where panel space is at a premium and combined protection is required.
• Light Industrial Control Panels: Suitable for auxiliary circuits and equipment protection where Type C tripping characteristic accommodates moderate inrush currents from motors and transformers.
• Bathroom & Kitchen Circuits: 30 mA sensitivity meets IEC requirements for personal protection in wet or damp locations.
• Renovation & Retrofit Projects: Compact 1P+N format replaces separate MCB and RCCB combinations, freeing DIN rail space in existing boards.

Frequently Asked Questions

What is the difference between an RCBO and a separate MCB + RCCB combination?

An RCBO like the DS201 C25 AC30 combines both functions into a single 1P+N module, saving DIN rail space, simplifying wiring, and providing selective tripping — only the faulty circuit is disconnected rather than an entire group.

What does the 'C25' designation mean?

'C' refers to the tripping characteristic curve (Type C), suitable for circuits with moderate inrush currents such as motors and fluorescent lighting. '25' denotes the 25 A rated current.

What does 'AC30' mean in the catalog number?

'AC' indicates the residual current type — the device responds to sinusoidal AC earth fault currents. '30' denotes the 30 mA residual current sensitivity, which is the standard threshold for personal shock protection per IEC 61008/61009.

Is this RCBO compatible with standard DIN rail enclosures?

Yes. The ABB DS201 series is designed for 35 mm DIN rail mounting and is compatible with standard distribution board accessories and enclosures.

What breaking capacity does this device offer at 400V AC?

The DS201 C25 AC30 has a rated breaking capacity (Icu) of 10 kA, suitable for most residential and light commercial distribution applications.