ABB SZ203-C20 Miniature Circuit Breaker, 3-Pole, 20A, 6kA

The ABB SZ203-C20 is a high-performance 3-pole miniature circuit breaker engineered to provide robust protection for electrical circuits in both residential and industrial environments. This device is designed to detect and interrupt overcurrent conditions, including overloads and short circuits, thereby preventing damage to wiring and connected equipment. With its C-curve tripping characteristic and a 20A rated current, it offers a balanced response time suitable for a wide range of standard electrical loads.

Advantages

This circuit breaker stands out due to its high manufacturing standards and reliability in demanding power distribution systems. The 6kA breaking capacity ensures that the device can safely handle significant fault currents, providing a high level of safety for electrical installations. Its compact 3-pole design allows for efficient space utilization in distribution boards, while the robust construction guarantees long-term operational stability and consistent performance under varying load conditions.

Suitable for

• Residential electrical distribution boards
• Commercial building power systems
• Industrial machinery and control panels
• Protection of lighting and heating circuits

This device may not be suitable for applications requiring a different tripping characteristic, such as B-curve for sensitive electronics or D-curve for high-inrush current motors. It is also not intended for use in environments exceeding its specified voltage or environmental ratings.

Key specifications

• Number of poles: 3
• Rated current: 20A
• Breaking capacity: 6kA
• Tripping characteristic: C-curve
• Mounting type: DIN rail

Installation should be performed by a qualified electrician in accordance with local electrical codes. The device is mounted onto a standard DIN rail within a distribution enclosure. Ensure that the supply voltage is disconnected before beginning the installation process. Secure the wires firmly into the terminals, ensuring proper contact to prevent overheating.

What to consider before purchase

• Verify that the 20A rating matches your circuit requirements
• Ensure the 3-pole configuration is compatible with your power supply system
• Check the available space in your distribution board
• Confirm that the C-curve characteristic is appropriate for your specific load type

For optimal safety and longevity, regularly inspect the connections for tightness and ensure the device is kept free from dust and moisture within a suitable enclosure.