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ABB S204MT-K40 MCB – 4P – K Curve – 40A – 10kA
ABB S204MT-K40 miniature circuit breaker, a 40 A four-pole K-characteristic AC circuit breaker with 10 kA rated breaking capacity for traction and railway applications.
£268.76
Why Choose the ABB S204MT-K40 Miniature Circuit Breaker?
The ABB S204MT-K40 is a robust four-pole miniature circuit breaker (MCB) designed for reliable overcurrent and short-circuit protection in traction, railway and industrial electrical installations. As part of the ABB System pro M compact S200MT series, it is specifically developed for demanding rolling stock applications where dependable circuit protection, mechanical robustness and resistance to harsh environmental conditions are required.
This circuit breaker combines a K tripping characteristic with a 10 kA rated breaking capacity, providing reliable protection for circuits supplying equipment with elevated starting currents. The S200MT range is designed for demanding railway environments, with construction intended to meet stringent fire and smoke requirements and withstand the shock and vibration associated with rolling stock applications.
With a rated current of 40 A, four protected poles and an AC supply, the S204MT-K40 is suitable for equipment and distribution circuit protection in railway vehicles and other demanding electrical systems. Its modular DIN-rail format enables straightforward installation within compatible electrical distribution and control assemblies.
Key Advantages
- Compact four-pole miniature circuit breaker designed for traction and railway applications.
- 40 A rated current suitable for protected AC equipment and distribution circuits.
- K tripping characteristic suited to circuits with elevated starting currents.
- 10 kA rated breaking capacity for effective short-circuit protection.
- Dedicated construction designed for demanding railway and rolling stock environments.
- Designed for operating conditions involving shock and vibration.
- DIN-rail mounting for convenient integration into modular electrical assemblies.
Key Features
- ABB System pro M compact S200MT series.
- 40 A rated current.
- K tripping characteristic.
- 4-pole configuration with four protected poles.
- 10 kA rated breaking capacity.
- AC operating supply.
- DIN-rail mounting for modular electrical distribution systems.
- Contact Position Indicator (CPI) for clear main-contact status indication.
- Construction designed for demanding railway fire and smoke requirements.
- Suitable for environments exposed to mechanical shock and vibration.
Reliable Protection for Railway and Traction Systems
Miniature circuit breakers in the ABB S200MT range are developed specifically for electrical protection in traction and rolling stock applications. Their construction is intended to meet demanding railway fire and smoke requirements, while the range is designed for operating conditions involving the mechanical stresses associated with railway vehicles.
The S204MT-K40 combines thermal and electromagnetic protection with a K characteristic suited to circuits where elevated starting currents can occur. Its four-pole configuration provides protection across four conductors, while the high breaking capacity helps interrupt fault currents safely within the specified operating conditions.
Typical Applications
- Railway rolling stock electrical systems.
- Traction and auxiliary circuits.
- Railway vehicle distribution panels.
- Motors, transformers and equipment with elevated starting currents.
- Industrial AC distribution systems requiring a K characteristic.
- Control and protection assemblies exposed to vibration and shock.
- Modular DIN-rail electrical installations.
Technical Specifications
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| Current | 40 A | |
|---|---|---|
| Poles | 4-pole | |
| Phase | Three Phase | |
| Device Type | MCB | |
| Trip Curve | K curve | |
| Breaking Capacity | 10 kA | |
| Product type | Miniature circuit breaker | |
| Rated current | 40 A | |
| Tripping characteristic | K | |
| Number of poles | 4 | |
| Protected poles | 4 | |
| Supply type | AC | |
| Frequency | 50 / 60 Hz | |
| Rated insulation voltage (Ui) | up to 440 V AC | |
| Rated impulse withstand voltage (Uimp) | 4 kV | |
| Energy limiting class | 3 | |
| Mounting type | DIN rail | |
| Width | 4 module units | |
| Installation depth | approx. 69 mm | |
| Operating temperature | -40 °C to +70 °C | |
| Manufacturer | ABB | |
| Series | System pro M compact S200MT (traction) | |
| Model | S204MT-K40 | |
| Order code | 2CDS274445R0557 | |
| Rated breaking capacity | 10 kA | |
| Supply | AC |
Frequently Asked Questions
What is the ABB S204MT-K40 used for?
The ABB S204MT-K40 provides overcurrent and short-circuit protection for four-pole AC circuits, particularly in traction, railway and rolling stock electrical installations.
What rated current does the S204MT-K40 have?
The S204MT-K40 has a rated current of 40 A.
What tripping characteristic does this circuit breaker use?
The S204MT-K40 uses a K tripping characteristic, making it suitable for circuits where elevated starting currents can occur.
What is the breaking capacity of the S204MT-K40?
The circuit breaker has a 10 kA rated breaking capacity.
How is the S204MT-K40 installed?
The S204MT-K40 is designed for DIN-rail mounting in modular electrical distribution and control assemblies.
Trusted for Demanding Traction Applications
ABB S200MT miniature circuit breakers are designed for railway and rolling stock applications where reliable circuit protection, resistance to demanding operating conditions and dependable integration into electrical systems are essential.
