Why Choose the ABB S203C6 Miniature Circuit Breaker?
The ABB S203C6 is a high-quality 3-pole miniature circuit breaker (MCB) designed to protect electrical circuits, cables and connected equipment against overloads and short circuits. Part of the established ABB System pro M compact S200 series, it combines thermal-magnetic protection, current-limiting performance and a compact modular design for residential, commercial and industrial installations.
Featuring a C curve tripping characteristic, the S203C6 accommodates moderate temporary inrush currents without unnecessary tripping. This makes it suitable for control equipment, transformers, power supplies, small motors, HVAC controls, lighting circuits and other inductive or mixed electrical loads.
With a rated current of 6 A, a 3-pole configuration and a rated operational voltage of 230/400 V AC, the ABB S203C6 is suitable for low-current three-phase circuits. Its 6 kA rated short-circuit capacity, DIN rail mounting and compatibility with ABB S200 accessories support straightforward installation in distribution boards, switchgear assemblies and control panels.
Key Advantages
- Reliable overload and short-circuit protection for three-phase circuits.
- 6 A rated current for low-current electrical applications.
- C curve tripping characteristic accommodates moderate starting currents.
- 3-pole configuration protects and disconnects three conductors simultaneously.
- 6 kA rated breaking capacity according to IEC/EN 60898-1.
- Current-limiting operation helps reduce fault energy and equipment stress.
- Compact three-module design simplifies panel installation.
- Compatible with a wide range of ABB S200 auxiliary accessories.
Key Features
- ABB System pro M compact S200 series.
- Model S203-C6.
- 6 A rated current.
- 3-pole configuration.
- C trip characteristic.
- 230/400 V AC rated operational voltage.
- 6 kA rated short-circuit capacity.
- Delayed thermal mechanism for overload protection.
- Electromagnetic mechanism for short-circuit protection.
- Current-limiting operation.
- Energy-limiting class 3.
- Red ON and green OFF contact-position indication.
- Failsafe bidirectional cylinder-lift terminals.
- Bottom-mounted auxiliary contact compatibility.
- Standard DIN rail mounting.
Reliable Thermal-Magnetic Circuit Protection
The ABB S203C6 uses two complementary tripping mechanisms to provide dependable circuit protection. Its delayed thermal mechanism responds to sustained overload conditions, while its electromagnetic mechanism rapidly disconnects the circuit when a short circuit occurs.
The C curve characteristic is designed to tolerate moderate temporary current surges while continuing to protect the circuit from excessive current. This makes the breaker particularly suitable for small motors, transformers, power supplies, contactor circuits and control equipment that may draw additional current during start-up.
Its current-limiting design reduces the peak current and energy allowed to pass during a fault. This helps minimise thermal and mechanical stress on cables, conductors, terminals and downstream equipment while supporting safer and more reliable operation.
Typical Applications
- Industrial control panels.
- Three-phase control circuits.
- Small motors and pumps.
- Transformers and power supplies.
- HVAC control equipment.
- Commercial distribution boards.
- Automation and process-control systems.
- OEM machinery.
- Lighting and auxiliary circuits.
