Why Choose the ABB S203C4 Miniature Circuit Breaker?
The ABB S203C4 is a premium 3-pole miniature circuit breaker (MCB) designed to provide dependable protection against overloads and short circuits in residential, commercial and industrial electrical installations. As part of the trusted ABB System pro M Compact S200 series, it combines reliable thermal-magnetic protection, current-limiting technology and a compact design for modern electrical distribution systems.
Featuring a C curve tripping characteristic, the S203C4 is ideal for circuits with moderate inrush currents, making it suitable for control equipment, small motors, transformers, power supplies, HVAC systems and general industrial applications. The thermal overload mechanism and electromagnetic short-circuit protection ensure fast, dependable fault clearance whilst helping to minimise damage to connected equipment.
With a rated current of 4 A, a 3-pole configuration and a 6 kA short-circuit breaking capacity, the ABB S203C4 is designed for three-phase electrical systems operating at up to 230/400 V AC. Its DIN rail mounting design allows rapid installation into distribution boards, switchgear assemblies and industrial control panels.
Key Advantages
- Reliable 3-pole miniature circuit breaker for overload and short-circuit protection.
- 4 A rated current suitable for low-current three-phase applications.
- C curve tripping characteristic for circuits with moderate inrush currents.
- 6 kA breaking capacity provides dependable fault protection.
- Current-limiting technology helps minimise fault energy.
- Compact DIN rail mounting for quick installation.
Key Features
- ABB System pro M Compact S200 series.
- Model S203-C4.
- 4 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.
- Bottom-mounted auxiliary contact compatibility.
- Clear red/green contact position indication.
- DIN rail mounting.
Reliable Protection for Low-Current Three-Phase Systems
The ABB S203C4 automatically disconnects electrical circuits whenever overload or short-circuit conditions occur, helping protect wiring, switchgear and connected electrical equipment. Its thermal-magnetic operating mechanism ensures dependable performance whilst reducing downtime and improving electrical safety.
The C curve characteristic makes the breaker particularly suitable for industrial control systems, automation equipment, transformers, small motors and power supplies where moderate temporary starting currents are expected. Current-limiting technology further helps reduce stress on electrical installations during fault conditions.
Typical Applications
- Industrial control panels.
- Automation systems.
- Small motors and transformers.
- Power supplies.
- Commercial distribution boards.
- OEM machinery.
- HVAC control circuits.
