Why Choose the ABB S203C40 Miniature Circuit Breaker?
The ABB S203C40 is a premium 3-pole miniature circuit breaker (MCB) designed to provide reliable protection against overloads and short circuits in residential, commercial and industrial electrical installations. As part of the proven ABB System pro M Compact S200 series, it combines dependable thermal-magnetic protection with current-limiting technology and a compact DIN rail design for modern power distribution systems.
Featuring a C curve tripping characteristic, the S203C40 is ideal for circuits with moderate inrush currents, making it suitable for motors, pumps, compressors, HVAC equipment, transformers and general industrial power distribution. Its delayed thermal tripping mechanism protects against overloads, while the electromagnetic tripping mechanism provides rapid short-circuit interruption.
With a rated current of 40 A, a 3-pole configuration and a 6 kA short-circuit breaking capacity, the ABB S203C40 is designed for three-phase systems operating at up to 400 V AC. Its patented twin terminals and compatibility with ABB auxiliary accessories simplify installation and future expansion.
Key Advantages
- Reliable 3-pole miniature circuit breaker for overload and short-circuit protection.
- 40 A rated current suitable for commercial and industrial distribution.
- C curve tripping characteristic for circuits with moderate inrush currents.
- 6 kA breaking capacity for dependable fault protection.
- Current-limiting technology helps minimise fault energy.
- Patented twin terminals simplify installation.
- Compact DIN rail mounting.
Key Features
- ABB System pro M Compact S200 series.
- Model S203-C40.
- 40 A rated current.
- 3-pole configuration.
- C trip characteristic.
- 230/400 V AC rated operational voltage.
- 6 kA rated short-circuit breaking capacity.
- Thermal and electromagnetic tripping mechanisms.
- Current-limiting operation.
- Patented twin terminals with captive screws.
- Clear red/green contact position indication.
- Bottom-mounted auxiliary contact compatibility.
- DIN rail mounting.
Reliable Protection for Three-Phase Electrical Systems
The ABB S203C40 automatically disconnects electrical circuits when overload or short-circuit conditions occur, helping protect wiring, switchgear and connected equipment from electrical damage. Its thermal-magnetic operating mechanism ensures dependable protection whilst reducing downtime and improving installation safety.
Its C curve characteristic makes the breaker particularly suitable for motors, compressors, pumps, HVAC systems and industrial machinery that experience moderate temporary starting currents. The current-limiting design helps reduce thermal and mechanical stress during fault conditions.
Typical Applications
- Industrial distribution boards.
- Commercial electrical installations.
- Motor and pump circuits.
- HVAC equipment.
- Industrial control panels.
- OEM machinery.
- Automation systems.
- Three-phase power distribution.
