ABB S203MT-K0,5NA 3 Pole + Neutral miniature circuit breaker with K characteristic, 0.5 A rated current and 10 kA breaking capacity for industrial and commercial electrical protection.
£332.33
The ABB S203MT-K0,5NA (Part Number: 2CDS273446R0157) is a premium 3 Pole + Neutral miniature circuit breaker (MCB) from the trusted ABB System pro M Compact S200M range. Designed to provide dependable overload and short circuit protection, it is particularly suited to industrial control panels, machine building and commercial electrical installations requiring a K characteristic breaker for high inrush current applications.
Featuring a 0.5 A rated current and a 10 kA breaking capacity, the S203MT-K0,5NA delivers reliable circuit protection while helping maintain system continuity. Its robust thermal and magnetic trip mechanisms provide fast fault interruption and dependable long-term performance in demanding environments.
Manufactured to ABB's renowned quality standards, this miniature circuit breaker complies with IEC/EN 60898-1 and IEC/EN 60947-2. The compact DIN rail mounted design allows straightforward installation into distribution boards and industrial control cabinets whilst remaining fully compatible with the ABB range of accessories and auxiliaries.
The ABB S203MT-K0,5NA provides dependable protection against overloads and short circuits whilst maintaining excellent current limiting performance. The K characteristic is particularly suited to applications where temporary high inrush currents occur, reducing nuisance tripping whilst maintaining effective protection.
As part of the ABB System pro M Compact range, this miniature circuit breaker integrates seamlessly into modern switchboards, distribution systems and industrial machinery, providing long service life and dependable performance in demanding operating environments.
| Current | 0.5 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M Compact S200M |
| Model | S203MT-K0,5NA |
| Manufacturer Part Number | 2CDS273446R0157 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 0.5 A |
| Trip characteristic | K Curve |
| Number of poles | 3 Pole + Neutral (3P+N) |
| Rated operational voltage | Up to 400 V AC |
| Frequency | 50 / 60 Hz |
| Breaking capacity | 10 kA |
| Protection rating | IP20 (IP40 when installed in an enclosure) |
| Mounting type | DIN rail |
| Mechanical endurance | 20,000 operating cycles |
| Terminal type | Screw terminals with failsafe bi-directional cylinder-lift terminals |
| Connecting capacity | Flexible 0.75 to 25 mm², rigid up to 35 mm² |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
It protects three-phase electrical circuits against overloads and short circuits in industrial, commercial and OEM electrical installations.
The ABB S203MT-K0,5NA has a 0.5 A rated current.
The K trip characteristic is designed for circuits with higher inrush currents, making it suitable for transformers, motors and inductive loads.
The breaker is designed for quick installation onto a standard DIN rail within switchboards and electrical control panels.
Yes. It supports a wide range of ABB auxiliary contacts, shunt trips, undervoltage releases and other compatible accessories.
ABB System pro M Compact miniature circuit breakers are widely specified by electrical contractors, panel builders and OEM manufacturers for delivering dependable protection, long service life and outstanding installation flexibility.
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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...