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ABB S203M-K50 MCB – S200M – 3P – K – 50A
ABB S203M-K50 three-pole 50 A miniature circuit breaker with K tripping characteristic and 10 kA breaking capacity for industrial, commercial and panel building applications.
£96.42
Why Choose the ABB S203M-K50 Miniature Circuit Breaker?
The ABB S203M-K50 is a robust three-pole miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection in industrial, commercial and panel building applications. As part of the ABB S200M System pro M compact series, it delivers dependable protection in a compact DIN rail mounted format.
This circuit breaker features a K tripping characteristic, making it particularly suitable for circuits with higher inrush currents such as motors, transformers, solenoids and other inductive loads. Its current limiting design helps reduce fault energy, protecting connected cables, switchgear and equipment during abnormal operating conditions.
With a 50 A rated current, three-pole configuration and high short-circuit performance, the ABB S203M-K50 is well suited to three-phase distribution boards, machinery panels and automation systems where reliable protection and reduced nuisance tripping are essential.
Key Advantages
- Compact three-pole miniature circuit breaker for industrial and commercial installations.
- 50 A rated current for dependable circuit protection.
- K tripping characteristic suitable for inductive loads and motor circuits.
- High short-circuit breaking capacity for demanding electrical applications.
- Current limiting design helps reduce stress during short-circuit events.
- Compatible with ABB System pro M compact accessories.
Key Features
- ABB S200M miniature circuit breaker series.
- 50 A rated current.
- Three-pole (3P) configuration.
- K characteristic thermal and magnetic tripping curve.
- 10 kA breaking capacity at 230 / 400 V AC.
- DIN rail mounting for fast installation in control panels.
- Delayed thermal tripping mechanism for overload protection.
- Electromechanical tripping mechanism for short-circuit protection.
Reliable Circuit Protection for Inductive Loads
Miniature circuit breakers such as the ABB S203M-K50 automatically disconnect the electrical supply when overload or short-circuit conditions occur. This helps protect wiring, switchgear and connected equipment from damage caused by excessive current.
The K curve is especially useful in applications where inductive loads may draw higher starting currents during normal operation. This helps minimise unwanted tripping while maintaining dependable protection during genuine electrical faults.
Typical Applications
- Three-phase industrial distribution boards.
- Motor control circuits and machinery panels.
- Transformer and inductive load protection.
- Automation and control cabinets.
- Commercial electrical installations.
- Panel building and OEM electrical equipment.
Technical Specifications
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| Phase | Three Phase | |
|---|---|---|
| Current | 50 A | |
| Poles | 3-pole | |
| Device Type | MCB | |
| Trip Curve | K curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | ABB | |
| Series | S200M | |
| Model | S203M-K50 | |
| Product ID | 2CDS273001R0577 | |
| Product type | Miniature circuit breaker (MCB) | |
| Rated current | 50 A | |
| Number of poles | 3P | |
| Tripping characteristic | K | |
| Rated operational voltage | 230 / 400 V AC | |
| Rated insulation voltage | 440 V | |
| Rated impulse withstand voltage | 4 kV | |
| Rated frequency | 50 / 60 Hz | |
| Rated short-circuit breaking capacity | 10 kA | |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077 | |
| Mounting type | DIN rail | |
| Protection rating | IP20 | |
| Dimensions (H × W × D) | 88 × 52.5 × 69 mm | |
| EAN | 4016779601351 | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S203M-K50 used for?
The ABB S203M-K50 is used to protect three-phase electrical circuits against overloads and short circuits in industrial, commercial and panel building applications.
What does the K tripping characteristic mean?
The K characteristic is designed for circuits with higher inrush currents, making it suitable for inductive loads such as motors, transformers and control equipment.
What is the current rating of the S203M-K50?
The ABB S203M-K50 has a 50 A rated current.
How many poles does this circuit breaker have?
This model is a three-pole (3P) miniature circuit breaker for three-phase electrical systems.
What breaking capacity does the S203M-K50 provide?
The ABB S203M-K50 provides a 10 kA short-circuit breaking capacity at 230 / 400 V AC.
Trusted by Electrical Professionals Worldwide
ABB S200M miniature circuit breakers are trusted by contractors, panel builders and industrial engineers for reliable protection, compact installation and consistent performance in demanding electrical systems.
