ABB S203P-K8NA miniature circuit breaker with 3+NP configuration, K curve and 8 A rated current for overload and short-circuit protection in electrical distribution systems.
The ABB S203P-K8NA is a premium miniature circuit breaker (MCB) from the ABB System pro M compact S200P series, engineered to provide dependable overload and short-circuit protection for demanding electrical installations. Featuring a K-curve tripping characteristic and an 8 A rated current, it is particularly suited to circuits supplying motors, transformers and other equipment with high inrush currents.
Designed with a 3+NP pole configuration, the S203P-K8NA provides protection for three phases while incorporating a neutral pole for three-phase plus neutral distribution systems. The S200P range combines high breaking capacity, current-limiting technology and robust construction, making it suitable for residential, commercial and industrial applications.
Its compact DIN rail mounting design allows straightforward installation within electrical distribution boards and control panels. The ABB S203P-K8NA is identified by manufacturer part number 2CDS283103R0407 and complies with internationally recognised electrical protection standards.
The ABB S203P-K8NA uses both thermal and electromagnetic tripping mechanisms to protect electrical circuits from overloads and short circuits. Its K-curve characteristic is intended for applications where higher transient currents occur during equipment start-up, making it particularly suitable for motors, transformers and inductive loads.
The robust S200P design delivers dependable performance, long service life and excellent fault interruption capability, helping protect valuable electrical equipment while maintaining system reliability.
| Current | 8 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200P |
| Model | S203P-K8NA |
| Manufacturer part number | 2CDS283103R0407 |
| Product type | Miniature circuit breaker |
| Rated current | 8 A |
| Tripping characteristic | K curve |
| Number of poles | 3+NP |
| Number of protected poles | 3 |
| Rated operational voltage | 400 V AC |
| Frequency | 50 / 60 Hz |
| Breaking capacity | Up to 25 kA (IEC 60947-2) |
| Protection rating | IP20 |
| Mounting type | DIN rail mounting |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
| Weight | approx. 0.56 kg |
| EAN | 4016779593311 |
The ABB S203P-K8NA protects three-phase electrical circuits against overloads and short circuits, particularly where high inrush currents are present.
The ABB S203P-K8NA has a rated current of 8 A.
A K-curve MCB is designed for circuits supplying motors, transformers and inductive equipment that experience higher starting currents than standard distribution circuits.
This model has a 3+NP configuration, providing three protected poles with a neutral pole.
The S203P-K8NA is designed for DIN rail installation within distribution boards, switchgear assemblies and industrial control panels.
ABB System pro M compact miniature circuit breakers are trusted worldwide for reliable circuit protection, high performance and long-term durability across residential, commercial and 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...