Description

The S203-C25 miniature circuit breaker from ABB’s System pro M compact S200 range provides reliable and precise protection for three-phase electrical systems. It features a dual tripping mechanism — a thermal trip for overload conditions and an electromechanical trip for short-circuit faults — ensuring comprehensive safety and efficiency. With its Type C characteristic curve, the S203-C25 is well-suited for circuits with moderate inrush currents such as lighting systems, HVAC units, and small motor loads. The 3-pole configuration guarantees full phase isolation, while the compact modular design supports DIN-rail installation and bottom-fitting auxiliary contacts to save up to 50% panel space. For full system integration and professional-grade installations, it complements our industrial panel fabrication solutions.

Key Specifications – Miniature Circuit Breaker S203-C25

• Model: S203-C25

• Rated Current: 25 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 for accurate overload and fault detection

• Type C curve ideal for circuits with moderate inrush currents

• Compact, current-limiting design ensures enhanced protection

• 3-pole configuration offers complete circuit isolation

• Compatible with ABB auxiliary and signaling modules

Typical Uses

• Industrial three-phase power systems

• Lighting, HVAC, and motor control panels

• Commercial and residential distribution networks

• Sub-distribution and automation systems

Installation & Support

The S203-C25 supports quick, tool-free DIN-rail mounting and secure terminal connections.

• Supports auxiliary and signaling accessories

• Supplied with wiring diagrams and installation documentation

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