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ABB S203M-D50 MCB – S200M – 3P – D – 50A
ABB S203M-D50 three-pole miniature circuit breaker with a 50 A rated current, D curve tripping characteristic and 10 kA short-circuit breaking capacity for industrial and commercial circuit protection.
£67.73
Why Choose the ABB S203M-D50 Miniature Circuit Breaker?
The ABB S203M-D50 is a reliable three-pole miniature circuit breaker (MCB) from the trusted ABB System pro M compact S200M series. It is designed to provide dependable protection against overloads and short circuits in commercial, industrial and OEM electrical installations.
Featuring a D curve tripping characteristic and a 50 A rated current, the S203M-D50 is suitable for circuits with high inrush currents, including transformers, power supplies, industrial machinery and selected motor-related loads. Its current-limiting design helps reduce fault energy while protecting connected equipment and electrical wiring.
The ABB S203M-D50 is designed for standard DIN rail mounting inside distribution boards, switchboards and industrial control panels. Its compact modular housing, robust construction and compatibility with ABB System pro M accessories make it a practical choice for professional electrical installations.
Key Advantages
- Reliable three-pole miniature circuit breaker for circuit protection.
- 50 A rated current for low voltage electrical circuits.
- D curve tripping characteristic for high inrush current applications.
- 10 kA short-circuit breaking capacity for dependable protection.
- DIN rail mounting for quick installation in control panels.
- Compatible with ABB System pro M compact accessories.
Key Features
- ABB System pro M compact S200M series.
- Three protected poles (3P).
- 50 A rated current.
- D characteristic tripping curve.
- 10 kA rated short-circuit capacity.
- Suitable for AC applications up to 400 V AC.
- Current-limiting thermal and magnetic trip mechanisms.
- Compact modular DIN rail mounted design.
Reliable Protection for Electrical Installations
The ABB S203M-D50 uses thermal and magnetic tripping mechanisms to protect electrical circuits from overload and short-circuit faults. The delayed thermal trip responds to sustained overloads, while the electromechanical magnetic trip provides rapid disconnection during short-circuit conditions.
Its D curve characteristic is designed for applications where higher starting currents are expected. This helps reduce nuisance tripping during energisation while maintaining effective protection for cables, equipment and electrical installations.
Typical Applications
- Industrial control panels.
- Commercial electrical distribution boards.
- Transformer and power supply circuits.
- Industrial equipment with high inrush currents.
- Motor control and machinery circuits.
- OEM machinery and panel building applications.
Technical Specifications
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| Phase | Three Phase | |
|---|---|---|
| Current | 50 A | |
| Poles | 3-pole | |
| Device Type | MCB | |
| Trip Curve | D curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | ABB | |
| Series | System pro M compact S200M | |
| Model | S203M-D50 | |
| Product ID | 2CDS273001R0501 | |
| EAN | 4016779601283 | |
| Product type | Miniature circuit breaker (MCB) | |
| Rated current | 50 A | |
| Number of poles | 3 | |
| Tripping characteristic | D | |
| Rated operational voltage | 400 V AC | |
| Frequency | 50 / 60 Hz | |
| Rated short-circuit capacity | 10 kA | |
| Protection rating | IP20 | |
| Mounting type | DIN rail mounting | |
| Dimensions (H × W × D) | approx. 88 × 52.5 × 69 mm | |
| Weight | approx. 0.356 kg |
Frequently Asked Questions
What is the ABB S203M-D50 used for?
The ABB S203M-D50 is used to protect three-pole electrical circuits against overloads and short circuits in industrial, commercial and OEM applications.
What does the D curve characteristic mean?
A D curve miniature circuit breaker is designed for circuits with high inrush currents, such as transformers, power supplies and selected motor-related loads.
What is the rated current of the ABB S203M-D50?
The ABB S203M-D50 has a 50 A rated current.
How many poles does this MCB have?
This model is a three-pole (3P) miniature circuit breaker.
How is the ABB S203M-D50 installed?
The device is designed for standard DIN rail mounting inside electrical distribution boards, control panels and machine enclosures.
Trusted by Electrical Professionals Worldwide
ABB System pro M compact miniature circuit breakers are widely specified by panel builders, electrical contractors and industrial engineers for dependable protection, compact installation and compliance with recognised international standards.
