ABB FS403M-B20/0.03

ABB FS403M-B20/0.03 Automatic Differential Current Circuit Breaker

The ABB FS403M-B20/0.03 is a globally distributed automatic differential current circuit breaker designed to detect and interrupt leakage currents, ensuring electrical safety in industrial systems. This device plays a critical role in preventing electrical faults and protecting personnel from electric shock hazards.

Key Technical Features and Applications of FS403M-B20/0.03

• Equipped with a 30 mA residual current sensitivity, enabling rapid detection of insulation faults to minimize risk of electric shock in industrial environments.
• Rated for 20 A nominal current, providing reliable overload and short-circuit protection for medium-load electrical circuits.
• Automatic differential operation enhances system safety by detecting differential currents caused by leakage or ground faults, suitable for complex electrical installations.
• Compact modular design allows for straightforward integration into existing switchboards, supporting efficient system assembly and maintenance.

This circuit breaker is essential in manufacturing plants and commercial electrical distribution networks where sensitive detection of earth leakage and prompt disconnection prevent equipment damage and ensure operational continuity.