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ABB S203-B8 MCB – S200 – 3P – B – 8A
ABB S203-B8 three pole 8 A B curve miniature circuit breaker with 6 kA breaking capacity for residential, commercial and industrial circuit protection.
Why Choose the ABB S203-B8 Miniature Circuit Breaker?
The ABB S203-B8 is a premium three-pole miniature circuit breaker (MCB) from the reliable ABB System pro M Compact S200 series. Engineered to provide dependable overload and short circuit protection, it is ideal for residential, commercial and industrial electrical installations where safety and long-term performance are essential.
Featuring a B tripping characteristic, the S203-B8 is designed for circuits with low inrush currents, making it suitable for lighting circuits, socket outlets, control systems and other standard electrical loads. Its combined thermal and magnetic trip mechanisms deliver fast, accurate protection while helping to maintain the continuity of electrical systems.
With a 8 A rated current, three-pole configuration and a 6 kA short circuit breaking capacity, this DIN rail mounted miniature circuit breaker provides reliable protection, straightforward installation and compliance with recognised international electrical standards.
Key Advantages
- Compact three-pole miniature circuit breaker for commercial and industrial applications.
- B curve tripping characteristic for low inrush current circuits.
- 8 A rated current for dependable overload protection.
- 6 kA breaking capacity for effective fault interruption.
- Thermal and magnetic trip mechanisms provide reliable overload and short circuit protection.
- DIN rail mounting for quick installation in distribution boards and switchgear.
Key Features
- ABB System pro M Compact S200 series.
- Three-pole (3P) configuration.
- 8 A rated current.
- B tripping characteristic.
- 6 kA rated short circuit breaking capacity.
- Suitable for 50 / 60 Hz AC systems.
- Failsafe bi-directional screw terminals for secure wiring.
- Compatible with ABB S200 auxiliary contacts and accessories.
Reliable Circuit Protection for Everyday Electrical Systems
The ABB S203-B8 protects electrical installations using a delayed thermal trip for overload protection together with an instantaneous magnetic trip for short circuit protection. This combination helps improve safety while ensuring dependable operation of connected equipment.
Its B characteristic makes it particularly suitable for circuits with low starting currents, including lighting installations, control circuits and general electrical distribution. The compact housing enables simple installation within modern switchboards and distribution panels.
Typical Applications
- Lighting circuits.
- Commercial distribution boards.
- Residential electrical installations.
- Control panels.
- Building services.
- General purpose power distribution.
Technical Specifications
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| Current | 8 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole | |
| Device Type | MCB | |
| Trip Curve | B curve | |
| Breaking Capacity | 6 kA | |
| Manufacturer | ABB | |
| Series | System pro M Compact S200 | |
| Model | S203-B8 | |
| Product type | Miniature Circuit Breaker (MCB) | |
| Rated current | 8 A | |
| Number of poles | 3 | |
| Tripping characteristic | B | |
| Rated operational voltage | 400 V AC | |
| Maximum operational voltage | 440 V AC | |
| Rated frequency | 50 / 60 Hz | |
| Breaking capacity | 6 kA | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Terminal type | Failsafe bi-directional screw terminals | |
| Dimensions (H × W × D) | 88 × 52.5 × 69 mm | |
| Weight | approx. 0.336 kg |
Frequently Asked Questions
What is the ABB S203-B8 used for?
The ABB S203-B8 protects three-phase electrical circuits against overloads and short circuits in residential, commercial and industrial applications.
What does the B tripping characteristic mean?
A B curve circuit breaker is intended for circuits with low inrush currents, making it ideal for lighting, socket outlets and general electrical distribution.
How many poles does the ABB S203-B8 have?
This model features a three-pole (3P) configuration for three-phase electrical systems.
What is the breaking capacity of this MCB?
The ABB S203-B8 provides a rated short circuit breaking capacity of 6 kA.
How is the ABB S203-B8 installed?
The circuit breaker is designed for installation onto a standard DIN rail inside electrical distribution boards, switchgear and control panels.
Trusted by Electrical Professionals Worldwide
ABB System pro M Compact miniature circuit breakers are trusted by electricians, panel builders and industrial engineers for dependable circuit protection, consistent performance and long operational life.
