ABB S203M-K63NA 3P+N miniature circuit breaker with 63 A rated current, K curve tripping characteristic and 10 kA breaking capacity for industrial circuit protection.
£373.48
The ABB S203M-K63NA is a premium 3P+N miniature circuit breaker (MCB) from the trusted ABB System pro M compact S200M series. Designed to deliver reliable overload and short-circuit protection, it is ideal for industrial, commercial and OEM electrical installations where dependable performance and high fault protection are essential.
Featuring ABB's advanced current-limiting technology, the S203M-K63NA combines a delayed thermal tripping mechanism for overload protection with an electromechanical tripping mechanism for short-circuit protection. Its K curve characteristic makes it particularly suitable for circuits with high inrush currents, including motors, transformers and other inductive equipment.
With a 63 A rated current, 3P+N configuration and 10 kA breaking capacity, this miniature circuit breaker provides dependable protection for three-phase electrical systems requiring neutral switching. Its compact DIN rail design enables straightforward installation in modern distribution boards and industrial control panels.
Miniature circuit breakers automatically disconnect electrical circuits when overloads or short circuits occur, helping to protect wiring, equipment and connected loads. The ABB S203M-K63NA combines thermal and magnetic tripping technologies to deliver dependable protection in demanding industrial environments.
Its K curve characteristic makes it particularly suitable for applications where temporary high inrush currents occur during normal operation, such as motor starters, transformers, compressors and other inductive equipment.
| Current | 63 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200M |
| Model | S203M-K63NA |
| Product ID | 2CDS273103R0607 |
| EAN | 4016779659611 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 63 A |
| Tripping characteristic | K |
| Number of poles | 3P+N |
| Protected poles | 3 |
| Rated operational voltage | 400 V AC |
| Rated insulation voltage | 440 V |
| Frequency | 50 / 60 Hz |
| Rated short-circuit breaking capacity | 10 kA |
| Rated ultimate short-circuit breaking capacity | 15 kA at 400 V AC |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Terminal type | Screw terminals |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
| Weight | approx. 0.47 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S203M-K63NA protects three-phase electrical circuits with neutral against overloads and short circuits in industrial, commercial and OEM installations.
The ABB S203M-K63NA has a 63 A rated current.
The K curve is intended for circuits with higher inrush currents, making it suitable for motors, transformers and other inductive equipment.
This miniature circuit breaker features a 3P+N configuration with three protected poles and a switched neutral.
The S203M-K63NA is designed for standard DIN rail mounting inside electrical distribution boards and industrial control panels.
ABB System pro M compact miniature circuit breakers are trusted worldwide by electrical contractors, panel builders and industrial engineers for delivering reliable circuit protection, compact installation and long service life.
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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...