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ABB S203MT-K0.5NA MCB – 3P+N – K Curve – 0.5A – 10kA
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.
Why Choose the ABB S203MT-K0,5NA Miniature Circuit Breaker?
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.
Key Advantages
- High quality 3 Pole + Neutral miniature circuit breaker.
- 0.5 A rated current for specialised protection applications.
- K characteristic ideal for circuits with high inrush currents.
- 10 kA breaking capacity for reliable fault protection.
- Thermal overload and magnetic short circuit protection.
- Compatible with ABB auxiliary contacts, shunt trips and accessories.
Key Features
- ABB System pro M Compact S200M series.
- Product code: 2CDS273446R0157.
- Model: S203MT-K0,5NA.
- Rated current: 0.5 A.
- Trip characteristic: K.
- Configuration: 3 protected poles + switched neutral.
- Rated operational voltage: Up to 400 V AC.
- Breaking capacity: 10 kA.
- DIN rail mounting.
- Compact modular construction.
Reliable Protection for Industrial Electrical Systems
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.
Typical Applications
- Industrial control panels.
- Machine building and OEM equipment.
- Motor control circuits.
- Commercial electrical installations.
- Automation systems.
- Low voltage distribution boards.
Technical Specifications
Tick the specs you need, then view products that match.
| Current | 0.5 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole + N | |
| Device Type | MCB | |
| Trip Curve | K curve | |
| Breaking Capacity | 10 kA | |
| 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 |
Frequently Asked Questions
What is the ABB S203MT-K0,5NA used for?
It protects three-phase electrical circuits against overloads and short circuits in industrial, commercial and OEM electrical installations.
What is the rated current of this circuit breaker?
The ABB S203MT-K0,5NA has a 0.5 A rated current.
What does the K characteristic mean?
The K trip characteristic is designed for circuits with higher inrush currents, making it suitable for transformers, motors and inductive loads.
How is this miniature circuit breaker installed?
The breaker is designed for quick installation onto a standard DIN rail within switchboards and electrical control panels.
Is the S203MT-K0,5NA compatible with ABB accessories?
Yes. It supports a wide range of ABB auxiliary contacts, shunt trips, undervoltage releases and other compatible accessories.
Trusted by Electrical Professionals Worldwide
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.
