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2CDS253001R0045 ABB S203-B4 Miniature Circuit Breaker 3P Type B 4 A
ABB S203-B4 is a 4 A three-pole Type B miniature circuit breaker from the System pro M compact S200 series designed to provide overload and short-circuit protection for low-inrush three-phase electrical circuits.
£74.07
Why Choose the ABB S203-B4 Miniature Circuit Breaker?
The ABB S203-B4 is a compact and reliable three-pole miniature circuit breaker (MCB) designed to protect electrical circuits against overloads and short circuits. As part of the established ABB System pro M compact S200 series, it combines thermal overload protection with electromagnetic short-circuit protection for dependable circuit protection in commercial and industrial electrical installations.
Featuring a Type B tripping characteristic, the S203-B4 is suited to circuits with relatively low starting and inrush currents. This makes it suitable for resistive loads, control equipment and other three-phase circuits where reliable protection and simultaneous disconnection of all three poles are required.
With a rated current of 4 A, a 3-pole configuration and a rated operational voltage of 400 V AC, the S203-B4 provides a compact DIN-rail protection solution. It offers a 6 kA rated short-circuit capacity according to IEC/EN 60898-1 and a 10 kA ultimate short-circuit breaking capacity according to IEC/EN 60947-2.
Key Advantages
- Reliable overload and short-circuit protection for three-phase circuits.
- 4 A rated current suitable for low-current distribution and control applications.
- 3-pole configuration provides simultaneous switching and protection of three conductors.
- Type B tripping characteristic suitable for loads with relatively low inrush currents.
- 6 kA breaking capacity according to IEC/EN 60898-1.
- 10 kA ultimate short-circuit breaking capacity according to IEC/EN 60947-2.
- Compact DIN-rail mounting for integration into distribution and control panels.
Key Features
- ABB System pro M compact S200 series.
- 4 A rated current.
- 3-pole configuration.
- Type B tripping characteristic.
- 400 V AC rated operational voltage.
- Thermal tripping mechanism for overload protection.
- Electromagnetic tripping mechanism for rapid short-circuit protection.
- Current-limiting design for dependable electrical circuit protection.
Reliable Three-Pole Circuit Protection
Miniature circuit breakers such as the ABB S203-B4 automatically disconnect a circuit when excessive current occurs. The S200 design combines thermal operation for sustained overload conditions with electromagnetic operation for rapid disconnection during short-circuit faults.
The three-pole construction enables simultaneous disconnection of all three poles, making the S203-B4 suitable for three-phase electrical systems. Its Type B characteristic is intended for circuits with comparatively low inrush currents, including suitable resistive, distribution and control loads.
Typical Applications
- Low-current three-phase electrical circuits.
- Industrial control and automation systems.
- Resistive-load circuits.
- Electrical machinery and control panels.
- Commercial electrical distribution systems.
- Industrial DIN-rail distribution boards.
Technical Specifications
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| Breaking Capacity | 6 kA | |
|---|---|---|
| Series | System pro M compact S200 | |
| ABB order code | 2CDS253001R0045 | |
| Product type | Miniature circuit breaker (MCB) | |
| Number of poles | 3 | |
| Number of protected poles | 3 | |
| Rated current | 4 A | |
| Tripping characteristic | Type B | |
| Rated operational voltage | 400 V AC | |
| Rated frequency | 50 / 60 Hz | |
| Rated short-circuit capacity | 6 kA according to IEC/EN 60898-1 | |
| Ultimate short-circuit breaking capacity | 10 kA according to IEC/EN 60947-2 | |
| Rated insulation voltage | 440 V | |
| Rated impulse withstand voltage | 4 kV | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2 | |
| Module width | 52.5 mm |
Frequently Asked Questions
What is the ABB S203-B4 used for?
The S203-B4 is used to protect three-phase electrical circuits against overloads and short circuits, particularly circuits with relatively low starting and inrush currents.
What is the rated current of the ABB S203-B4?
The ABB S203-B4 has a rated current of 4 A.
How many poles does the S203-B4 have?
The S203-B4 is a 3-pole miniature circuit breaker, providing simultaneous switching and protection across all three poles.
What does the Type B characteristic mean?
The Type B tripping characteristic is suited to circuits with relatively low starting and inrush currents, including suitable resistive, control and general distribution loads.
What is the breaking capacity of the S203-B4?
The S203-B4 has a 6 kA rated short-circuit capacity according to IEC/EN 60898-1 and a 10 kA ultimate short-circuit breaking capacity according to IEC/EN 60947-2.
Trusted Circuit Protection from ABB
ABB System pro M compact S200 miniature circuit breakers provide dependable current-limiting overload and short-circuit protection for commercial and industrial electrical installations, with multiple pole configurations and tripping characteristics for different circuit requirements.
