The ABB S203 C40 is a three-pole miniature circuit breaker (MCB) designed to protect electrical installations against overloads and short circuits. It belongs to the well-known ABB S200 series, widely used in residential, commercial, and industrial distribution boards for its reliability, safety, and high manufacturing quality.

This device combines thermal protection for overload conditions with magnetic protection for short circuits, ensuring safe and reliable protection of electrical circuits and connected equipment.

The breaker features three mechanically linked poles operated by a common handle, allowing simultaneous disconnection of all three phases.

⚙️ Technical Specifications

Brand: ABB
Series: S200
Model: S203 C40
Type: Miniature Circuit Breaker (MCB)
Number of poles: 3P (three-phase)

🔌 Electrical Ratings

• Rated current: 40 A

• Tripping characteristic: Curve C

• Rated voltage: 400 V AC

• Maximum voltage: 277 / 480 V AC

• Frequency: 50 / 60 Hz

⚡ Breaking Capacity

• 10 kA @ 400 V

• 20 kA @ 230 V

📜 Standards

• IEC / EN 60898

• IEC 60947-2

🔌 Connections

Connection terminals:

Line input:

• 1

• 3

• 5

Load output:

• 2

• 4

• 6

Compatible with standard wiring used in electrical distribution panels.

🛡 Construction Features

✔ Integrated thermal and magnetic protection
✔ Common operating lever for all three poles
✔ Compact modular construction
✔ High operational reliability
✔ DIN rail mounting (35 mm)

🏭 Applications

This circuit breaker is commonly used in:

✔ Industrial electrical panels
✔ Three-phase power distribution systems
✔ Industrial automation systems
✔ Electrical line protection
✔ Photovoltaic installations
✔ Protection of motors and electrical equipment