ABB S203-K10NA miniature circuit breaker with 10 A rating, K trip characteristic and 3 protected poles plus neutral for industrial and commercial electrical protection.
£146.22
The ABB S203-K10NA is a premium 3-pole + neutral miniature circuit breaker (MCB) from the proven ABB System pro M compact S200 series. Designed for dependable overload and short circuit protection, it is ideal for industrial control panels, OEM machinery, commercial switchboards and electrical distribution systems requiring reliable circuit protection.
Featuring a K trip characteristic, the S203-K10NA is specifically designed for circuits with moderate inrush currents, making it an excellent choice for motors, transformers, control circuits and other inductive loads. Its current limiting construction helps reduce fault energy, improving equipment protection while maintaining excellent system reliability.
With a 10 A rated current, 3 protected poles plus neutral and a compact DIN rail mounted design, the ABB S203-K10NA provides straightforward installation and is fully compatible with ABB System pro M compact accessories including auxiliary contacts, shunt trips and undervoltage releases.
The ABB S203-K10NA combines thermal overload protection with instantaneous magnetic short circuit protection to safeguard electrical equipment against damaging fault conditions. Its current limiting construction helps reduce the energy released during fault events, extending the service life of connected equipment.
As part of ABB's renowned System pro M compact range, the S203-K10NA provides dependable performance, straightforward installation and long-term reliability for industrial, commercial and OEM electrical installations.
| Current | 10 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200 |
| Model | S203-K10NA |
| Product type | Miniature circuit breaker |
| Rated current | 10 A |
| Tripping characteristic | K |
| Poles | 3 protected poles + neutral |
| Rated operational voltage | Up to 440 V AC |
| Maximum operating voltage (UL) | 480Y/277 V AC |
| Rated frequency | 50 / 60 Hz |
| Breaking capacity | 6 kA |
| Energy limiting class | 3 |
| Mounting type | DIN rail |
| Terminal type | Failsafe bi-directional screw terminals |
| Protection rating | IP20 (IP40 when installed in enclosure) |
| Dimensions (H × W × D) | 88 × 52.5 × 69 mm |
| Weight | Approx. 0.375 kg |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL1077 |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S203-K10NA protects electrical circuits against overloads and short circuits in industrial, commercial and OEM installations.
The K characteristic is intended for circuits with moderate inrush currents, making it suitable for motors, transformers and inductive loads.
The S203-K10NA features 3 protected poles plus a neutral pole for use on three-phase systems with a neutral conductor.
Yes. The ABB S203-K10NA is designed for installation on standard DIN rails used in control panels and distribution boards.
Yes. It is compatible with ABB auxiliary contacts, shunt trips, undervoltage releases and other System pro M compact accessories.
ABB System pro M compact miniature circuit breakers are trusted by electrical engineers, panel builders and OEM manufacturers for reliable circuit protection, outstanding build quality and long service life.
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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...