Why Choose the ABB S203MT-C40 Miniature Circuit Breaker?
The ABB S203MT-C40 is a high-performance 3-pole miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection in demanding electrical installations. Part of the specialist ABB S200MT range, it is developed for traction, railway and industrial applications where dependable modular protection is essential.
With a C tripping characteristic, the S203MT-C40 is suitable for general-purpose circuits with moderate inrush currents. This makes it a practical choice for distribution boards, control panels, machine circuits and industrial electrical systems requiring consistent and reliable protection.
Rated at 40 A with a 3-pole configuration and 10 kA short-circuit breaking capacity, the ABB S203MT-C40 provides robust circuit protection in a compact DIN rail format. Its current-limiting design helps reduce fault energy and supports safe operation in demanding environments.
Key Advantages
- 3-pole miniature circuit breaker for three-phase circuit protection.
- 40 A rated current suitable for industrial distribution circuits.
- C curve tripping characteristic for circuits with moderate inrush currents.
- 10 kA breaking capacity for demanding electrical installations.
- Designed for traction, railway and industrial applications.
- Compatible with ABB System pro M compact accessories.
Key Features
- ABB S203MT-C40 miniature circuit breaker.
- S200MT series modular protection device.
- 3 protected poles.
- 40 A rated current.
- C characteristic trip curve.
- 10 kA rated short-circuit capacity.
- Thermal-magnetic tripping for overload and short-circuit protection.
- DIN rail mounting for panel and distribution board installation.
Reliable Protection for Three-Phase Circuits
Miniature circuit breakers such as the ABB S203MT-C40 automatically disconnect electrical circuits 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 S200MT range is designed for demanding transport and industrial environments. Its current-limiting performance, robust construction and compatibility with ABB modular accessories make the S203MT-C40 a dependable choice for panel builders, railway engineers and industrial electrical contractors.
Typical Applications
- Railway and traction electrical systems.
- Three-phase distribution boards.
- Industrial control panels and switchboards.
- Machine building and OEM electrical equipment.
- Commercial and industrial low-voltage installations.
- Power distribution circuits with moderate inrush currents.
