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ABB S203M-B63 MCB – S200M – 3P – B – 63A
ABB S203M-B63 miniature circuit breaker from the System pro M compact S200M range. A 3-pole 63 A B curve MCB with 10 kA breaking capacity for reliable overload and short circuit protection.
£62.20
Why Choose the ABB S203M-B63 Miniature Circuit Breaker?
The ABB S203M-B63 is a compact and reliable 3-pole miniature circuit breaker (MCB) designed to protect electrical circuits against overloads and short circuits. As part of the ABB System pro M compact S200M series, it provides dependable circuit protection for commercial, industrial and residential low voltage installations.
Featuring a B curve tripping characteristic, the S203M-B63 is suitable for general purpose circuits where relatively low inrush currents are expected. Its current limiting design uses delayed thermal tripping for overload protection and electromechanical tripping for short circuit protection, helping support safe and consistent operation.
With a 63 A rated current, 3-pole configuration and 10 kA breaking capacity, this miniature circuit breaker is ideal for DIN rail mounted distribution boards, industrial control panels and electrical enclosures requiring robust circuit protection in a compact modular format.
Key Advantages
- Compact 3-pole miniature circuit breaker for reliable circuit protection.
- 63 A current rating for higher load electrical circuits.
- B curve tripping characteristic for general purpose applications.
- 10 kA short circuit breaking capacity at 230 / 400 V AC.
- Thermal overload and electromechanical short circuit protection.
- DIN rail mounting for quick installation in distribution boards and control panels.
Key Features
- ABB System pro M compact S200M series.
- 3-pole (3P) miniature circuit breaker.
- 63 A rated current.
- B curve tripping characteristic.
- 10 kA rated breaking capacity.
- Current limiting design for enhanced fault protection.
- Complies with IEC/EN 60898-1 and IEC/EN 60947-2.
- Compatible with ABB System pro M compact accessories.
Reliable Protection for Electrical Distribution Systems
Miniature circuit breakers such as the ABB S203M-B63 automatically disconnect the electrical supply when overload or short circuit faults are detected. This helps protect cables, connected equipment and downstream circuits from damage while improving the safety and reliability of low voltage installations.
The ABB S200M range is trusted by panel builders, electrical contractors and industrial engineers because it combines compact dimensions, strong breaking performance and long service life with compatibility across ABB modular protection accessories.
Typical Applications
- Commercial electrical distribution boards.
- Industrial control panels.
- Three-phase power distribution systems.
- Machine building and automation equipment.
- OEM electrical assemblies.
- Building services and infrastructure installations.
Technical Specifications
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| Phase | Three Phase | |
|---|---|---|
| Current | 63 A | |
| Poles | 3-pole | |
| Device Type | MCB | |
| Trip Curve | B curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | ABB | |
| Series | System pro M compact S200M | |
| Model | S203M-B63 | |
| Product type | Miniature Circuit Breaker (MCB) | |
| Product ID | 2CDS273001R0635 | |
| EAN | 4016779543880 | |
| Current rating | 63 A | |
| Number of poles | 3P | |
| Tripping characteristic | B | |
| Rated operational voltage | 230 / 400 V AC | |
| Rated insulation voltage | 440 V AC | |
| Rated impulse withstand voltage | 4 kV | |
| Rated frequency | 50 / 60 Hz | |
| Breaking capacity | 10 kA | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Terminal type | Screw terminals | |
| Operating temperature | -25 to 55 °C | |
| Dimensions (H × W × D) | approx. 88 × 52.5 × 69 mm | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S203M-B63 used for?
The ABB S203M-B63 protects three-phase electrical circuits against overloads and short circuits in commercial, industrial and residential installations.
What current rating does the S203M-B63 have?
The S203M-B63 has a 63 A rated current.
What does the B curve tripping characteristic mean?
A B curve miniature circuit breaker trips quickly at relatively low fault currents, making it suitable for general purpose electrical circuits with modest inrush currents.
How many poles does the ABB S203M-B63 have?
The S203M-B63 is a 3-pole miniature circuit breaker designed to protect and switch three conductors simultaneously.
Where is the S203M-B63 typically installed?
It is designed for installation on standard DIN rails inside distribution boards, industrial control panels and electrical enclosures.
Trusted by Electrical Professionals Worldwide
ABB System pro M compact miniature circuit breakers are trusted worldwide by contractors, panel builders and industrial engineers for dependable circuit protection, consistent performance and long-term reliability.
