Why Choose the ABB S203C20 Miniature Circuit Breaker?
The ABB S203C20 is a premium 3-pole miniature circuit breaker (MCB) engineered to provide reliable protection against overloads and short circuits in commercial, industrial and residential electrical installations. As part of the trusted ABB System pro M Compact S200 series, it delivers dependable circuit protection, robust construction and long-term performance for modern electrical distribution systems.
Featuring a C curve tripping characteristic, the S203C20 is designed for circuits with moderate inrush currents, making it ideal for motors, pumps, compressors, HVAC equipment and general industrial power distribution. Its thermal-magnetic operating mechanism provides precise overload protection together with rapid short-circuit interruption to safeguard connected equipment.
With a rated current of 20 A, a 3-pole configuration and a 6 kA short-circuit breaking capacity, the ABB S203C20 is suitable for three-phase electrical systems operating at 230/400 V AC. The compact DIN rail mounting design allows straightforward installation within distribution boards, switchgear and industrial control panels.
Key Advantages
- Reliable 3-pole miniature circuit breaker for overload and short-circuit protection.
- 20 A rated current suitable for commercial and industrial electrical circuits.
- C curve tripping characteristic for applications with moderate inrush currents.
- 6 kA breaking capacity provides dependable fault protection.
- Current-limiting design helps reduce fault energy.
- Compact DIN rail mounting for quick installation.
Key Features
- ABB System pro M Compact S200 series.
- Model S203-C20.
- 20 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 Three-Phase Electrical Systems
The ABB S203C20 automatically disconnects electrical circuits whenever overload or short-circuit conditions occur, helping protect cables, switchgear and connected electrical equipment. Its thermal-magnetic design ensures dependable operation while reducing the risk of electrical faults and unnecessary downtime.
The C curve characteristic makes this breaker particularly suitable for circuits supplying motors, pumps, compressors, HVAC systems and other equipment with moderate starting currents. The current-limiting construction further helps reduce stress on electrical installations during fault conditions.
Typical Applications
- Industrial control panels.
- Three-phase electrical distribution boards.
- Motor and pump protection.
- HVAC installations.
- Commercial buildings.
- OEM machinery and automation equipment.
- General industrial power distribution.
