ABB S203P-B63NA System pro M compact S200P miniature circuit breaker featuring a 3P+N configuration, 63 A rated current and B curve characteristic for commercial and industrial circuit protection.
The ABB S203P-B63NA is a premium 3P+N miniature circuit breaker (MCB) from the ABB System pro M compact S200P series. Designed for dependable overload and short circuit protection, it is ideal for commercial and industrial electrical installations requiring safe protection of three-phase circuits with a switched neutral.
Featuring a B tripping characteristic, the S203P-B63NA is intended for circuits with low inrush currents, making it well suited to lighting circuits, resistive loads, building services and general power distribution. Its current limiting construction reduces fault energy, helping to protect connected equipment and improve installation safety.
With a 63 A rated current, 3P+N configuration and a rated short circuit capacity of 15 kA, this DIN rail mounted miniature circuit breaker delivers reliable protection while remaining fully compatible with ABB's range of modular accessories for modern switchboards and control panels.
The ABB S203P-B63NA combines thermal overload protection with instantaneous magnetic short circuit protection to safeguard electrical installations. The B curve characteristic provides rapid protection for circuits with relatively low inrush currents, helping to ensure safe operation of standard distribution systems.
As part of ABB's System pro M compact range, the S203P-B63NA offers excellent reliability, long service life and compatibility with a comprehensive range of accessories including auxiliary contacts, shunt trips and undervoltage releases, making it ideal for modern electrical installations.
| Current | 63 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200P |
| Model | S203P-B63NA |
| Product ID | 2CDS283103R0635 |
| EAN | 4016779590167 |
| Product type | Miniature Circuit Breaker (MCB) |
| Rated current | 63 A |
| Poles | 3P+N |
| Protected poles | 3 |
| Trip characteristic | B Curve |
| Rated operational voltage | 400 V AC |
| Maximum operational voltage | 440 V AC |
| Frequency | 50 / 60 Hz |
| Rated short circuit capacity | 15 kA |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Terminal type | Screw terminals |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
| Weight | approx. 0.56 kg |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL1077, CSA 22.2 No. 235 |
The ABB S203P-B63NA protects three-phase electrical circuits against overloads and short circuits in commercial and industrial installations.
A B curve MCB is designed for circuits with relatively low inrush currents, making it suitable for lighting, heating and general distribution circuits.
This model features a 3P+N configuration, providing protection for three phases together with a switched neutral.
The ABB S203P-B63NA has a rated current of 63 A.
Yes. The S203P-B63NA is designed for installation on standard DIN rails used in switchboards, distribution boards and industrial control panels.
ABB System pro M compact miniature circuit breakers are trusted by panel builders, electrical contractors and OEM manufacturers for dependable circuit protection, robust construction and long service life in demanding commercial and industrial environments.
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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...