Description

The S203-C50 miniature circuit breaker from ABB’s System pro M compact S200 series delivers reliable three-phase circuit protection across residential, commercial, and industrial applications. Featuring a delayed thermal tripping mechanism for overload protection and an electromechanical trip for short-circuit events, it ensures quick and dependable fault isolation. The Type C tripping curve makes it ideal for circuits with moderate inrush currents such as motors, HVAC, and lighting systems. Its compact 3-pole design allows full phase isolation and easy DIN-rail installation, while optional bottom-fitting auxiliary contacts can reduce panel space usage by up to 50%. For seamless integration, the S203-C50 can be implemented within our industrial panel fabrication solutions to enhance system performance and protection.

Key Specifications – Miniature Circuit Breaker S203-C50

• Model: S203-C50

• Rated Current: 50 A

• Tripping Characteristic: Type C

• Rated Voltage: 230/400 V AC

• Breaking Capacity: 6 kA

• Poles: 3P (Three-Pole)

• Tripping Mechanisms:

  • Thermal: Overload protection

  • Electromechanical: Short-circuit protection

• Standards Compliance: IEC/EN 60898-1, IEC/EN 60947-2, UL1077

• Mounting: DIN-rail modular system

• Configurations: 1P, 1P+N, 2P, 3P, 3P+N, 4P

• Operating Temperature: -25°C to +55°C

Highlights

• Dual tripping mechanism ensures precise and fast protection

• Type C curve suitable for moderate inrush current circuits

• 3-pole configuration provides complete phase isolation

• Compact modular design with current-limiting capability

• Compatible with auxiliary and signaling contact modules

Typical Uses

• Three-phase distribution panels and sub-systems

• Industrial machinery, HVAC, and lighting circuits

• Commercial and residential electrical protection

• Control systems and automation applications

Installation & Support

The S203-C50 supports quick DIN-rail installation for efficient panel setup.

• Compatible with ABB auxiliary and signaling accessories

• Supplied with detailed wiring and installation documentation

• Supported by ABB’s technical service and spare parts network