Why Choose the ABB S203-D40 Miniature Circuit Breaker?
The ABB S203-D40 is a reliable 3-pole miniature circuit breaker (MCB) designed to protect electrical circuits against overloads and short circuits. Part of the ABB System pro M compact S200 range, it provides dependable modular protection for residential, commercial and industrial electrical installations.
With a D tripping characteristic, the S203-D40 is designed for circuits with high inrush currents, making it suitable for selected motor circuits, transformers, power supplies and inductive loads. Its current-limiting design helps reduce fault energy and supports safe operation in demanding electrical systems.
Rated at 40 A with a 3-pole configuration and 6 kA short-circuit breaking capacity, the ABB S203-D40 provides robust protection for three-phase circuits. Its DIN rail mounting format enables straightforward installation in distribution boards, control panels and industrial electrical enclosures.
Key Advantages
- 3-pole miniature circuit breaker for three-phase circuit protection.
- 40 A rated current suitable for higher-load electrical circuits.
- D curve tripping characteristic for circuits with high inrush currents.
- 6 kA breaking capacity for reliable short-circuit protection.
- Part of the ABB System pro M compact S200 range.
- DIN rail mounting for efficient installation in panels and distribution boards.
Key Features
- ABB S203-D40 miniature circuit breaker.
- S200 series modular protection device.
- 3 protected poles.
- 40 A rated current.
- D characteristic trip curve.
- 6 kA rated short-circuit capacity.
- Thermal-magnetic tripping for overload and short-circuit protection.
- Compatible with ABB System pro M compact accessories.
Reliable Protection for High Inrush Three-Phase Circuits
Miniature circuit breakers such as the ABB S203-D40 automatically disconnect the circuit when excessive current is detected. The delayed thermal tripping mechanism provides overload protection, while the electromechanical tripping mechanism responds rapidly to short-circuit faults.
The D curve characteristic is designed for applications where high temporary inrush currents may occur during normal operation. This makes the S203-D40 a practical choice for selected motor loads, transformers, power supplies and industrial equipment requiring dependable three-phase protection.
Typical Applications
- Three-phase distribution boards.
- Industrial control panels and switchboards.
- Motor circuits with high inrush current.
- Transformer and inductive load protection.
- Machine building and OEM equipment.
- Commercial and industrial low-voltage installations.
