ABB S203M-D20NA miniature circuit breaker from the System pro M compact S200M series, featuring 20 A rated current, D curve tripping characteristic and 3+NP pole configuration for reliable circuit protection.
£247.02
The ABB S203M-D20NA is a high performance miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection in residential, commercial and industrial electrical installations. As part of the trusted ABB System pro M compact S200M series, this device offers dependable protection for final circuits, control panels and distribution boards.
This miniature circuit breaker features a D curve tripping characteristic, making it suitable for circuits with high inrush currents, such as transformers, motors and inductive loads. Its current-limiting design helps protect cables, equipment and downstream components by interrupting fault currents quickly and safely.
With a rated current of 20 A, a 3+NP pole configuration and a breaking capacity of up to 10 kA, the S203M-D20NA is ideal for demanding three-phase circuit protection applications where a switched neutral is required. Its DIN rail mounting format enables fast installation in modern electrical enclosures.
Miniature circuit breakers such as the ABB S203M-D20NA protect electrical circuits by automatically disconnecting the supply during overload or short-circuit conditions. This helps reduce the risk of cable damage, equipment failure and electrical faults within distribution systems.
The S200M range is engineered for professional electrical installations requiring high breaking capacity and consistent operation. Its modular design makes it suitable for compact control panels, switchboards and DIN rail distribution systems used across industrial and building applications.
| Current | 20 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200M |
| Model | S203M-D20NA |
| Product type | Miniature circuit breaker |
| Product ID | 2CDS273103R0201 |
| EAN | 4016779663427 |
| Rated current | 20 A |
| Tripping characteristic | D curve |
| Pole configuration | 3+NP |
| Rated operational voltage | 230 / 400 V AC |
| Rated breaking capacity | up to 10 kA |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2 |
| Mounting type | DIN rail mounting |
| Application | Residential, commercial and industrial circuit protection |
The ABB S203M-D20NA is used to protect three-phase electrical circuits against overloads and short circuits in distribution boards, control panels and industrial installations.
This miniature circuit breaker has a rated current of 20 A.
A D curve MCB is designed for circuits with high inrush currents, such as motors, transformers and inductive loads.
The S203M-D20NA has a 3+NP configuration, providing three protected phase poles plus a neutral pole.
It is designed for DIN rail installation inside electrical distribution boards, switchboards and control panels.
ABB System pro M compact miniature circuit breakers are widely used by electricians, panel builders and industrial engineers for reliable circuit protection in modern 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...