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.
£200.74
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.
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.
| Current | 8 A |
|---|---|
| Phase | Single Phase |
| 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 |
The ABB S203-K8NA provides supplementary overload and short circuit protection for industrial electrical circuits, machinery and control panels.
The K curve is designed for circuits with higher inrush currents than standard loads, making it suitable for motors, transformers and inductive equipment.
The S203-K8NA features 3 protected poles plus a neutral pole, making it suitable for three-phase systems with neutral.
Yes. The ABB S203-K8NA is designed for quick and secure installation onto standard DIN rails.
Yes. It supports a range of ABB accessories including auxiliary contacts, shunt trips and undervoltage release modules.
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.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...