Description

The S203-C40 miniature circuit breaker from ABB’s System pro M compact S200 range provides reliable three-phase circuit protection for residential, commercial, and industrial installations. It features a delayed thermal tripping mechanism for overload protection and an electromechanical tripping mechanism for short-circuit faults, ensuring safe and efficient performance. The Type C tripping curve makes it ideal for circuits with moderate inrush currents such as HVAC systems, lighting networks, and control panels. Its compact 3-pole modular design allows full phase isolation and efficient DIN-rail installation, while bottom-fitting auxiliary contacts can be added to save up to 50% space. For complete system integration and professional-grade performance, it can be incorporated into our industrial panel fabrication solutions.

Key Specifications – Miniature Circuit Breaker S203-C40

• Model: S203-C40

• Rated Current: 40 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 system ensures fast and accurate protection

• Type C curve ideal for moderate inrush current applications

• 3-pole design provides complete phase isolation

• Compact modular design saves panel space

• Compatible with ABB auxiliary and signaling accessories

Typical Uses

• Three-phase industrial and commercial power systems

• HVAC, lighting, and motor control circuits

• Sub-distribution boards and automation panels

• Equipment and process protection systems

Installation & Support

The S203-C40 is designed for easy DIN-rail installation and quick maintenance.

• Supports auxiliary and signaling contact modules

• Includes full wiring and installation documentation

• Backed by ABB’s technical support and global service availability