ABB S303P-B63NA 63A Type B miniature circuit breaker with 3P+N configuration and 15 kA breaking capacity for industrial and commercial electrical protection.
£201.53
The ABB 2CDS383103R0635, also identified as the S303P-B63NA, is a premium miniature circuit breaker (MCB) designed to provide reliable protection against overloads and short circuits in industrial and commercial electrical installations. As part of the trusted ABB System pro M compact S300P series, it offers exceptional reliability, compact dimensions and high-performance protection for modern electrical distribution systems.
Featuring a Type B tripping characteristic, this circuit breaker is particularly suitable for circuits with low inrush currents, including lighting installations, socket outlet circuits, office equipment and sensitive electronic loads. Its combined thermal and magnetic protection ensures fast disconnection during fault conditions while maintaining dependable overload protection.
With a rated current of 63 A, a 3P+N configuration and a rated operational voltage of up to 415 V AC, the S303P-B63NA is ideal for three-phase distribution boards, commercial buildings, OEM equipment and industrial control panels. Its compact DIN rail mounting and robust ABB construction ensure straightforward installation and dependable long-term performance.
The ABB S303P-B63NA automatically disconnects electrical circuits whenever overload or short-circuit conditions occur, helping to protect wiring, distribution equipment and connected electrical devices. Its industrial-grade construction ensures dependable performance in demanding commercial and industrial environments.
Its Type B tripping characteristic is ideal for circuits with relatively low starting currents, making it particularly suitable for lighting circuits, office installations, residential distribution boards and electronic equipment requiring fast fault protection.
| Current | 63 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S300P |
| Model | S303P-B63NA |
| Product ID | 2CDS383103R0635 |
| EAN | 4016779076746 |
| Product type | Miniature circuit breaker |
| Rated current | 63 A |
| Number of poles | 3P+N |
| Protected poles | 3 |
| Neutral pole | Switched |
| Tripping characteristic | Type B |
| Rated operational voltage | 415 V AC |
| Voltage type | AC/DC |
| Rated frequency | 50 / 60 Hz |
| Rated insulation voltage | 500 V |
| Impulse withstand voltage | 6 kV |
| Rated short-circuit breaking capacity | 15 kA |
| Protection rating | IP20 (IP40 when installed in a suitable enclosure) |
| Mounting type | 35 mm DIN rail |
| Terminal capacity | 0.75 to 35 mm² solid, 0.75 to 25 mm² flexible |
| Operating temperature | -40 to +70 °C |
| Approximate dimensions (H × W × D) | 88 × 70 × 69 mm |
| Approximate weight | 0.496 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
It protects three-phase electrical circuits against overloads and short circuits, particularly lighting, socket outlet and general-purpose distribution circuits with low inrush currents.
The ABB S303P-B63NA has a rated current of 63 A.
Type B breakers trip quickly on relatively low fault currents, making them ideal for lighting, office equipment, domestic installations and other circuits with minimal inrush current.
The breaker provides a rated short-circuit breaking capacity of 15 kA.
The breaker mounts directly onto a standard 35 mm DIN rail inside electrical distribution boards and industrial control panels.
ABB System pro M compact S300P miniature circuit breakers are trusted worldwide for delivering dependable overload and short-circuit protection across industrial, commercial and OEM electrical installations.
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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...