ABB S203P-B10NA miniature circuit breaker from the System pro M compact S200P range, a 3+N pole B curve 10 A MCB designed for overload and short-circuit protection in electrical distribution and control systems.
The ABB S203P-B10NA is a high-performance miniature circuit breaker (MCB) from the ABB System pro M compact S200P series, designed to provide reliable overload and short-circuit protection in commercial, industrial and advanced residential electrical installations. With a B curve tripping characteristic and 10 A rated current, it is suitable for circuits with low inrush currents and sensitive final sub-circuit protection.
This ABB S200P MCB uses current-limiting technology with separate thermal and electromagnetic tripping mechanisms. The thermal mechanism protects against overload conditions, while the electromagnetic mechanism responds rapidly to short-circuit faults, helping protect cables, equipment and downstream electrical components.
With a 3+N pole configuration, 400 V AC rated voltage and high 25 kA short-circuit breaking capacity, the S203P-B10NA is ideal for DIN rail mounted distribution boards and control panels where dependable three-phase plus neutral circuit protection is required. Its compact modular format supports professional installation in commercial, industrial and building services applications.
Miniature circuit breakers such as the ABB S203P-B10NA protect electrical circuits by automatically disconnecting the supply when overload or short-circuit conditions occur. This helps prevent cable damage, equipment failure and unsafe operating conditions within distribution and control systems.
The S200P range is engineered for professional installations where reliability, compact design and compliance with recognised international standards are important. Its B curve characteristic makes it well suited to circuits where fault protection is required with lower magnetic trip thresholds, such as lighting circuits, small power circuits and sensitive control equipment.
| Current | 10 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200P |
| Model | S203P-B10NA |
| Product ID | 2CDS283103R0105 |
| EAN | 4016779590082 |
| Product type | Miniature circuit breaker |
| Rated current | 10 A |
| Release characteristic | B curve |
| Number of poles | 3+N |
| Number of protected poles | 3 |
| Rated operational voltage | 400 V AC |
| Rated insulation voltage | 440 V |
| Voltage type | AC |
| Frequency | 50 / 60 Hz |
| Rated short-circuit breaking capacity | 25 kA |
| Current limiting class | 3 |
| Degree of protection | IP20 |
| Pollution degree | 3 |
| Overvoltage category | III |
| Mounting type | DIN rail |
| Width | 4 modular spacings |
| Built-in depth | 69 mm |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
| Weight | approx. 0.56 kg |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077, CSA 22.2 No. 235 |
The ABB S203P-B10NA is used to protect three-phase plus neutral electrical circuits against overloads and short circuits.
This miniature circuit breaker has a rated current of 10 A.
A B curve MCB is designed for circuits with low inrush currents and typically trips faster than C or D curve devices under magnetic fault conditions.
The S203P-B10NA has a 3+N pole configuration, providing protection for three poles with a neutral connection.
It is typically installed on DIN rail inside distribution boards, electrical cabinets and control panels.
ABB System pro M compact miniature circuit breakers are widely used by installers, panel builders and electrical engineers for dependable circuit protection in modern commercial and industrial electrical systems.
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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...