Why Choose the ABB S203M-D20NA Miniature Circuit Breaker?
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.
Key Advantages
- High quality ABB miniature circuit breaker for circuit protection.
- 20 A rated current for three-phase electrical circuits.
- D curve characteristic suitable for high inrush current loads.
- 3+NP configuration with protected phase poles and neutral pole.
- Current-limiting design helps improve electrical safety and equipment protection.
- DIN rail mounting for fast installation in distribution boards and control panels.
Key Features
- ABB System pro M compact S200M series.
- 20 A rated current.
- D curve tripping characteristic.
- 3+NP pole configuration.
- Up to 10 kA breaking capacity at 230 / 400 V AC.
- Thermal tripping mechanism for overload protection.
- Electromechanical tripping mechanism for short-circuit protection.
- Designed for DIN rail mounting in modular electrical systems.
Reliable Circuit Protection for Electrical Installations
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.
Typical Applications
- Three-phase distribution boards and switchboards.
- Industrial control panels and machine circuits.
- Motor, transformer and inductive load protection.
- Commercial electrical installations.
- Building services and plant room distribution.
- OEM electrical panels and automation systems.
