Why Choose the ABB S204MT-K4UC Miniature Circuit Breaker?
The ABB S204MT-K4UC is a compact and reliable miniature circuit breaker (MCB) designed to provide overload and short-circuit protection in electrical circuits for industrial, traction and railway applications. As part of the ABB System pro M compact S200MT series, this four-pole breaker is engineered for dependable operation in demanding rolling-stock environments and supports both AC and DC applications through its UC universal-current design.
The S204MT-K4UC combines a K tripping characteristic with a 10 kA rated breaking capacity, providing circuit protection suited to applications where the connected loads can require a higher magnetic trip threshold than conventional B or C characteristics. The device is designed in accordance with the requirements applicable to ABB's S200MT railway and traction range.
With a 4 A rated current, four poles and compatibility with AC and DC supplies, the S204MT-K4UC is suitable for protecting control, auxiliary and distribution circuits in railway electrical systems. Its DIN-rail mounting allows straightforward installation within electrical distribution boards and control cabinets.
Key Advantages
- Compact miniature circuit breaker designed for traction and railway applications.
- 4 A rated current for protection of appropriately sized electrical circuits.
- Four-pole configuration for multi-pole circuit protection and isolation.
- K tripping characteristic for applications requiring the characteristic's specific overload and short-circuit response.
- 10 kA rated breaking capacity for effective short-circuit protection.
- AC and DC universal-current capability for flexible railway electrical applications.
- DIN-rail mounting simplifies installation in distribution and control equipment.
Key Features
- ABB System pro M compact S200MT series for traction and railway applications.
- 4 A rated current.
- Four-pole construction.
- K tripping characteristic.
- 10 kA rated breaking capacity.
- Designed for AC and DC universal-current applications.
- DIN-rail mounting for electrical distribution and control panels.
- Suitable for railway and rolling-stock electrical systems.
- Thermomagnetic protection against overloads and short circuits.
Reliable Circuit Protection for Railway Electrical Systems
Miniature circuit breakers such as the ABB S204MT-K4UC protect electrical circuits by interrupting the supply when excessive current caused by an overload or short circuit is detected. The K characteristic provides a defined tripping response for applications where the connected equipment and operating conditions call for this protection characteristic.
The S200MT UC series is developed for rolling-stock applications and supports universal-current operation, allowing the same product family to be used in both AC and DC circuits. ABB specifies the series for railway applications with requirements covering electrical performance, environmental conditions and mechanical resistance associated with rolling stock.
Typical Applications
- Railway rolling-stock electrical systems.
- Traction auxiliary circuits.
- Railway control and signalling equipment.
- On-board electrical distribution systems.
- Auxiliary and control circuits in rail vehicles.
- Industrial electrical systems requiring AC/DC miniature circuit protection.
