ABB S203P-B25NA System pro M compact S200P miniature circuit breaker with 3P+N configuration, 25 A rated current, B tripping characteristic and high breaking capacity for commercial and industrial circuit protection.
The ABB S203P-B25NA is a high-performance 3P+N miniature circuit breaker (MCB) from the ABB System pro M compact S200P series. Designed for reliable overload and short circuit protection, it provides dependable circuit protection for commercial, industrial and OEM electrical installations where robust fault protection is required.
This miniature circuit breaker features a B tripping characteristic and a 25 A rated current, making it suitable for circuits with low inrush currents such as lighting, control circuits and general power distribution. Its current-limiting construction helps reduce let-through energy during fault conditions, protecting cables, switchgear and connected equipment.
With a 3P+N configuration and a high 25 kA breaking capacity, the S203P-B25NA offers professional-grade protection in demanding three-phase electrical systems. The compact DIN rail mounted design supports efficient installation within distribution boards, control cabinets and electrical enclosures.
Miniature circuit breakers such as the ABB S203P-B25NA protect electrical installations by automatically disconnecting the circuit during overload or short circuit conditions. The thermal trip mechanism responds to sustained overloads, while the electromagnetic trip mechanism reacts rapidly to short circuit faults.
The B curve characteristic is designed for circuits where inrush current is relatively low, making the S203P-B25NA suitable for lighting, resistive loads, control circuits and general electrical distribution. Its high breaking capacity and compact modular construction make it ideal for professional panel building and industrial installations.
| Current | 25 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200P |
| Model | S203P-B25NA |
| Product type | Miniature Circuit Breaker (MCB) |
| Product ID | 2CDS283103R0255 |
| EAN | 4016779590129 |
| Rated current | 25 A |
| Tripping characteristic | B |
| Number of poles | 3P+N |
| Total poles | 4 |
| Rated voltage | 400 V AC |
| Rated insulation voltage | 440 V |
| Rated impulse withstand voltage | 4 kV |
| Frequency | 50 / 60 Hz |
| Breaking capacity | Up to 25 kA |
| Current limiting class | 3 |
| Pollution degree | 3 |
| Overvoltage category | III |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Width | 4 modular spacings |
| Built-in depth | 69 mm |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077, CSA 22.2 No. 235 |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
The S203P-B25NA is used to protect three-phase electrical circuits against overloads and short circuits in commercial, industrial and OEM applications.
This miniature circuit breaker has a 25 A rated current.
A B curve MCB is designed to trip quickly on relatively low fault currents, making it suitable for circuits with low inrush currents such as lighting, control circuits and general distribution loads.
The S203P-B25NA is a 3P+N device with three protected poles and a switched neutral.
Yes. The S203P-B25NA is designed for standard DIN rail mounting inside electrical panels, distribution boards and control cabinets.
ABB System pro M compact miniature circuit breakers are widely used by panel builders, electrical contractors and industrial engineers for dependable circuit protection, high fault performance and long-term reliability in demanding electrical installations.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...