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ABB S203-K8NA MCB – S200 – 3P+N – K – 8A
ABB S203-K8NA miniature circuit breaker with 8 A rating, K trip characteristic and 3 protected poles plus neutral for industrial and commercial electrical protection.
£110.41
Why Choose the ABB S203-K8NA Miniature Circuit Breaker?
The ABB S203-K8NA is a high-performance 3-pole + neutral miniature circuit breaker (MCB) from the trusted ABB System pro M compact S200 series. Designed for supplementary circuit protection, it provides dependable overload and short circuit protection for industrial control panels, OEM machinery and commercial electrical installations.
Featuring a K trip characteristic, the S203-K8NA is particularly suited to circuits with moderate inrush currents, making it ideal for motors, transformers, control equipment and inductive loads. Its current limiting design helps reduce fault energy, improving protection for connected equipment while enhancing overall electrical system reliability.
With an 8 A current rating, 3-phase + neutral configuration and DIN rail mounting, the ABB S203-K8NA offers fast installation, excellent durability and compatibility with a wide range of ABB accessories including auxiliary contacts, shunt trips and undervoltage releases.
Key Advantages
- Reliable 3-pole + neutral miniature circuit breaker.
- 8 A rated current for industrial and commercial protection.
- K trip characteristic ideal for inductive and motor loads.
- Thermal and magnetic tripping mechanisms provide dependable protection.
- DIN rail mounting for quick installation.
- Compatible with ABB System pro M compact accessories.
Key Features
- ABB System pro M compact S200 series.
- Model: S203-K8NA.
- Rated current: 8 A.
- Configuration: 3 protected poles + neutral.
- K tripping characteristic.
- Thermal overload and magnetic short circuit protection.
- DIN rail mounting.
- Finger-safe screw terminals.
- Current limiting design.
- Compatible with auxiliary contacts, shunt trips and undervoltage releases.
Reliable Circuit Protection for Industrial Applications
The ABB S203-K8NA combines thermal overload protection with instantaneous magnetic short circuit protection to safeguard electrical equipment and distribution circuits. Its current limiting technology reduces fault energy, helping to minimise damage and improve system reliability.
As part of ABB's proven System pro M compact range, this miniature circuit breaker is designed for demanding industrial environments where dependable protection, simple installation and long service life are essential.
Typical Applications
- Industrial control panels.
- Motor control circuits.
- OEM machinery.
- Automation systems.
- Electrical distribution boards.
- Commercial and industrial electrical installations.
Technical Specifications
Tick the specs you need, then view products that match.
| Phase | Three Phase | |
|---|---|---|
| Current | 8 A | |
| Poles | 3-pole + N | |
| Device Type | MCB | |
| Trip Curve | K curve | |
| Breaking Capacity | 6 kA | |
| Manufacturer | ABB | |
| Series | System pro M compact S200 | |
| Model | S203-K8NA | |
| Product type | Miniature circuit breaker | |
| Rated current | 8 A | |
| Tripping characteristic | K | |
| Poles | 3 protected poles + neutral | |
| Rated operational voltage | Up to 480Y/277 V AC | |
| Frequency | 50 / 60 Hz | |
| Breaking capacity | 6 kA at 480Y/277 V AC | |
| Protection | Thermal magnetic | |
| Mounting type | DIN rail | |
| Terminal type | Screw terminals | |
| Protection rating | IP20 | |
| Standards | UL1077, IEC/EN 60898-1, IEC/EN 60947-2 | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S203-K8NA used for?
The ABB S203-K8NA provides supplementary overload and short circuit protection for industrial electrical circuits, machinery and control panels.
What does the K trip characteristic mean?
The K curve is designed for circuits with higher inrush currents than standard loads, making it suitable for motors, transformers and inductive equipment.
How many poles does this circuit breaker have?
The S203-K8NA features 3 protected poles plus a neutral pole, making it suitable for three-phase systems with neutral.
Can the breaker be mounted on a DIN rail?
Yes. The ABB S203-K8NA is designed for quick and secure installation onto standard DIN rails.
Is the S203-K8NA compatible with ABB accessories?
Yes. It supports a range of ABB accessories including auxiliary contacts, shunt trips and undervoltage release modules.
Trusted by Electrical Professionals Worldwide
ABB System pro M compact miniature circuit breakers are widely used by panel builders, OEMs and electrical engineers who require dependable protection, proven performance and long-term reliability in industrial electrical installations.
