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2CDS272445R0085 ABB S202MT-B8 MCB 10kA 2P Type B 8A
ABB S202MT-B8 is an 8 A 2-pole B-characteristic miniature circuit breaker with 10 kA short-circuit breaking capacity, designed for reliable circuit protection in demanding railway, traction and industrial applications.
£64.43
Why Choose the ABB S202MT-B8 Miniature Circuit Breaker?
The ABB S202MT-B8 is a specialised 2-pole miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection in demanding railway, traction and industrial electrical systems. As part of the ABB S200MT miniature circuit breaker series, it combines an 8 A rated current with a B tripping characteristic and a high 10 kA short-circuit breaking capacity.
Developed specifically for the railway sector, the S202MT-B8 protects cables and conductors against overload and short-circuit conditions. Its B characteristic provides sensitive magnetic tripping for circuits with relatively low starting currents, making it well suited to control, auxiliary, resistive and other lower-inrush electrical loads.
With a rated current of 8 A, a 2-pole configuration and 10 kA breaking capacity, the S202MT-B8 provides dependable protection in a compact DIN rail format. ABB order code 2CDS272445R0085 identifies this specific B-characteristic 8 A version within the S200MT traction range.
Key Advantages
- Specialised miniature circuit breaker for railway and traction applications.
- 8 A rated current with a 2-pole configuration.
- B tripping characteristic suited to circuits with relatively low starting currents.
- 10 kA short-circuit breaking capacity for dependable fault protection.
- Designed to protect cables and conductors against overload and short circuit.
- Robust construction developed for demanding rolling stock and transportation environments.
Key Features
- ABB S200MT miniature circuit breaker series.
- 8 A rated current.
- 2-pole configuration with both poles protected.
- B tripping characteristic.
- 10 kA short-circuit breaking capacity.
- 400 V AC rated voltage.
- 440 V rated insulation voltage.
- 4 kV rated impulse withstand voltage.
- Energy limiting class 3 for effective fault-current limitation.
- Compact DIN rail construction with IP20 protection.
Reliable Circuit Protection for Railway and Traction Systems
Miniature circuit breakers such as the ABB S202MT-B8 automatically disconnect an electrical circuit when excessive current occurs because of an overload or short circuit. This helps protect cables, conductors and connected electrical equipment while allowing the breaker to be reset after the electrical fault has been identified and corrected.
The ABB S200MT range is specifically developed for railway applications and combines dependable circuit protection with construction suited to demanding rolling stock environments. The B characteristic provides comparatively sensitive magnetic operation, making the S202MT-B8 particularly suitable for control, auxiliary and other circuits where substantial normal inrush currents are not expected.
Typical Applications
- Railway and rolling stock electrical systems.
- Traction electrical installations.
- Control and auxiliary circuits.
- Resistive and lower-inrush electrical loads.
- Industrial control panels and switchgear.
- Transportation and automation electrical systems.
Technical Specifications
| Series | S200MT |
|---|---|
| ABB order code | 2CDS272445R0085 |
| Product type | Miniature circuit breaker (MCB) |
| Product group | DC / Traction MCB |
| Rated current | 8 A |
| Number of poles | 2 |
| Number of protected poles | 2 |
| Tripping characteristic | B |
| Rated voltage | 400 V AC |
| Voltage type | AC |
| Frequency | 50–60 Hz |
| Rated short-circuit breaking capacity | 10 kA |
| Rated insulation voltage (Ui) | 440 V |
| Rated impulse withstand voltage (Uimp) | 4 kV |
| Energy limiting class | 3 |
| Overvoltage category | III |
| Pollution degree | 3 |
| Protection rating | IP20 |
| Railway fire protection | R26 / HL3 according to EN 45545 |
| Shock and vibration classification | Category 1, Class A/B according to IEC 61373 |
| Mounting type | DIN rail |
| Installation depth | 69 mm |
| Connection capacity, stranded conductor | 0.75–25 mm² |
| Operating ambient temperature | -40 to +70 °C |
| Weight | approx. 0.25 kg |
| EAN | 4016779122481 |
Frequently Asked Questions
What is the ABB S202MT-B8 used for?
The ABB S202MT-B8 is a miniature circuit breaker designed to protect cables and electrical circuits against overload and short-circuit currents in demanding railway, traction and industrial applications.
What is the current rating of the S202MT-B8?
The S202MT-B8 has a rated current of 8 A and uses a 2-pole configuration with both poles protected.
What does the B characteristic mean?
The B tripping characteristic provides relatively sensitive magnetic short-circuit protection and is typically suited to circuits with low or moderate normal inrush currents, including many control, auxiliary and resistive loads.
What is the breaking capacity of the ABB S202MT-B8?
The S202MT-B8 has a 10 kA rated short-circuit breaking capacity, providing robust fault protection for demanding electrical installations.
Is the ABB S202MT-B8 suitable for railway applications?
Yes. The S202MT-B8 belongs to ABB's S200MT range developed specifically for railway applications and is designed to meet demanding fire, shock and vibration requirements encountered in rolling stock and transportation environments.
Trusted Circuit Protection from ABB
ABB S200MT miniature circuit breakers provide dependable overload and short-circuit protection for demanding railway and transportation electrical systems, combining high breaking capacity with robust construction developed for traction environments.
