ABB S203P-C63NA System pro M compact S200P miniature circuit breaker, a 3P+N 63 A C curve MCB designed for commercial and industrial circuit protection.
The ABB S203P-C63NA is a high performance 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 suitable for commercial and industrial electrical installations requiring reliable protection for three-phase circuits with neutral switching.
Featuring a C tripping characteristic, the S203P-C63NA is ideal for general power distribution circuits where moderate inrush currents may occur. This makes it suitable for lighting, socket circuits, control panels, small motors and mixed commercial or industrial loads.
With a 63 A rated current, 3P+N configuration and breaking capacity up to 25 kA, this DIN rail mounted ABB circuit breaker provides a compact and robust protection solution for switchboards, distribution boards and machine control panels.
Miniature circuit breakers such as the ABB S203P-C63NA protect electrical installations by disconnecting circuits during overload or short circuit conditions. The delayed thermal mechanism responds to overloads, while the electromechanical magnetic mechanism provides rapid tripping during short circuit faults.
The C curve characteristic is widely used for circuits with moderate inrush currents, offering a practical balance between nuisance trip resistance and dependable fault protection. This makes the S203P-C63NA a strong choice for distribution boards, control panels and general industrial electrical systems.
| Current | 63 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200P |
| Model | S203P-C63NA |
| Product ID | 2CDS283103R0634 |
| EAN | 4016779591188 |
| Product type | Miniature Circuit Breaker (MCB) |
| Rated current | 63 A |
| Poles | 3P+N |
| Protected poles | 3 |
| Trip characteristic | C Curve |
| Rated voltage | 400 V AC |
| Rated insulation voltage | 440 V |
| Frequency | 50 / 60 Hz |
| Breaking capacity | Up to 25 kA |
| Current limiting class | 3 |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Terminal type | Screw terminals |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL1077, CSA 22.2 No. 235 |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
| Weight | approx. 0.56 kg |
The ABB S203P-C63NA is used to protect electrical circuits against overloads and short circuits in commercial, industrial and control panel applications.
A C curve MCB is designed for general circuits with moderate inrush currents, making it suitable for lighting, socket circuits, control panels and small motor loads.
The S203P-C63NA has a 3P+N configuration, with three protected poles and a switched neutral.
The ABB S203P-C63NA has a rated current of 63 A.
Yes. The S203P-C63NA is designed for installation on standard DIN rails in distribution boards, switchboards and industrial control panels.
ABB System pro M compact miniature circuit breakers are trusted by electrical engineers, panel builders and OEM manufacturers for dependable circuit protection, compact installation and reliable performance in demanding 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...