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ABB S203M-K0.5NA MCB – S200M – 3P+N – K – 0.5A
ABB S203M-K0.5NA miniature circuit breaker featuring a 3P+N configuration, 0.5 A rated current, Type K tripping characteristic and 10 kA breaking capacity for residential, commercial and industrial circuit protection applications.
£103.24
Why Choose the ABB S203M-K0.5NA Miniature Circuit Breaker?
The ABB S203M-K0.5NA (Part Number 2CDS273103R0157) is a high-performance 3P+N miniature circuit breaker (MCB) from the trusted ABB System pro M compact S200M range. Designed for residential, commercial and industrial electrical installations, it provides reliable protection against overloads and short circuits.
This ABB miniature circuit breaker is current limiting and uses two separate tripping mechanisms: a delayed thermal trip for overload protection and an electromechanical trip for short circuit protection. Its compact DIN rail mounted format makes it suitable for distribution boards, switchgear assemblies and industrial control panels.
With a 0.5 A rated current, Type K tripping characteristic, 3P+N configuration and 10 kA breaking capacity, the S203M-K0.5NA is suitable for specialist control, inductive load and automation circuits where dependable protection and tolerance of higher inrush currents are required.
Key Advantages
- High quality ABB System pro M compact S200M miniature circuit breaker.
- 3P+N configuration for three-phase systems with switched neutral.
- Type K tripping curve suitable for inductive and higher inrush current applications.
- 0.5 A rated current for sensitive control and protection circuits.
- 10 kA breaking capacity provides dependable fault interruption.
- Current limiting construction helps reduce stress during short circuit conditions.
Key Features
- ABB System pro M compact S200M series.
- Model: S203M-K0.5NA.
- Manufacturer Part Number: 2CDS273103R0157.
- Rated current: 0.5 A.
- Type K tripping characteristic.
- 3P+N pole configuration.
- 10 kA rated breaking capacity.
- Compatible with ABB System pro M compact accessories.
Reliable Protection for Specialist Control Circuits
The ABB S203M-K0.5NA protects electrical circuits by disconnecting the supply when overload or short circuit conditions occur. The delayed thermal mechanism responds to sustained overloads, while the electromechanical trip provides fast interruption under short circuit fault conditions.
Type K miniature circuit breakers are commonly selected for inductive loads and circuits where higher inrush currents may occur during start-up. This makes the S203M-K0.5NA suitable for control circuits, coils, transformers, automation systems and equipment requiring precise low-current protection.
Typical Applications
- Industrial control panels.
- Automation and control circuits.
- Transformer and coil protection.
- Inductive load circuits.
- Machine building and OEM equipment.
- Commercial and industrial distribution systems.
Technical Specifications
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| Phase | Three Phase | |
|---|---|---|
| Current | 0.5 A | |
| Poles | 3-pole + N | |
| Device Type | MCB | |
| Trip Curve | K curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | ABB | |
| Series | System pro M compact S200M | |
| Model | S203M-K0.5NA | |
| Part Number | 2CDS273103R0157 | |
| Product type | Miniature Circuit Breaker (MCB) | |
| Rated current | 0.5 A | |
| Tripping characteristic | Type K | |
| Pole configuration | 3P+N | |
| Rated operational voltage | 400 V AC | |
| Frequency | 50 / 60 Hz | |
| Breaking capacity | 10 kA | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm | |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2 | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S203M-K0.5NA used for?
It is used to protect three-phase electrical circuits against overloads and short circuits, particularly where low current ratings and tolerance of inductive inrush currents are required.
What is the current rating of this circuit breaker?
The ABB S203M-K0.5NA has a 0.5 A rated current.
What does Type K tripping characteristic mean?
Type K MCBs are designed for inductive loads and circuits with higher inrush currents, such as coils, transformers and control equipment.
How many poles does this circuit breaker have?
This model has a 3P+N configuration, providing three protected poles with neutral switching.
Where is the S203M-K0.5NA typically installed?
It is designed for DIN rail mounting inside distribution boards, switchgear assemblies and industrial control panels.
Trusted by Electrical Professionals Worldwide
ABB System pro M compact miniature circuit breakers are trusted by contractors, panel builders and industrial engineers worldwide for dependable protection, reliable operation and consistent installation quality.
