Eaton FRCMM-40/4/003-A Residual Current Circuit Breaker, 4-Pole, 40A, 30mA, Type A

The Eaton FRCMM-40/4/003-A is a professional-grade 4-pole residual current circuit breaker (RCCB) engineered to provide comprehensive electrical safety in both residential and industrial environments. This device is designed to monitor electrical circuits for leakage currents, effectively disconnecting the power supply when a fault is detected to prevent electric shock and potential fire hazards. With a robust construction and high-performance standards, it serves as a critical component in modern electrical distribution systems.

Advantages

This residual current circuit breaker offers superior reliability due to its Type A classification, which allows it to detect both standard alternating current (AC) and pulsating direct current (DC) residual currents. This makes it highly versatile for modern installations that include electronic equipment, such as power supplies, frequency converters, or LED lighting systems. The device is built for durability and consistent operation, ensuring long-term protection for connected circuits and end-users.

Suitable for

• Residential electrical distribution boards
• Industrial machinery and equipment protection
• Installations with electronic power supplies
• Protection against leakage currents in AC and pulsating DC systems

When it may not be suitable

This device is not intended for use in circuits where the load exceeds the 40A rated current, as this could lead to overheating or premature failure. It is also not suitable for direct current (DC) systems without pulsating components or for applications requiring a different sensitivity threshold than the specified 30mA.

Key specifications

• Number of poles: 4
• Rated current: 40A
• Rated residual operating current: 30mA
• Type: A (AC and pulsating DC sensitive)

How to use

The Eaton FRCMM-40/4/003-A must be installed by a qualified electrician in accordance with local electrical regulations. It is typically mounted on a standard DIN rail within a distribution board. Ensure that the supply cables are connected to the input terminals and the load cables to the output terminals, following the wiring diagram provided on the device housing. After installation, the device should be tested using the integrated test button to verify its mechanical and electrical functionality.

What to consider before purchase

• Verify that the 40A rating is sufficient for your total circuit load
• Ensure the 30mA sensitivity meets the safety requirements for your specific application
• Confirm that the 4-pole configuration matches your electrical system layout

Usage recommendations

Regularly test the residual current circuit breaker using the built-in test button at least every six months to ensure the mechanism remains operational and provides continuous protection.