EATON PFIM-100/4/03-A Residual Current Circuit Breaker 4P 100A 300mA Type A

The EATON PFIM-100/4/03-A is a robust 4-pole residual current circuit breaker (RCCB) engineered to provide high-level electrical safety in demanding environments. This device is specifically designed to detect and interrupt residual currents, effectively protecting electrical installations from faults and reducing the risk of fire or equipment damage. With its high current rating and precise sensitivity, it serves as a critical component in modern electrical distribution systems.

Advantages

This residual current circuit breaker offers exceptional reliability and durability, ensuring consistent performance even under heavy electrical loads. Its Type A classification allows it to detect both AC and pulsating DC residual currents, providing a broader range of protection compared to standard AC-only devices. The 4-pole configuration makes it highly versatile for three-phase systems, while the high-quality construction ensures long-term operational stability in commercial and industrial settings.

Suitable for

• Industrial electrical distribution boards
• Commercial building power systems
• Protection of three-phase electrical circuits
• Installations requiring detection of pulsating DC components

When it may not be suitable

This device is not intended for use in single-phase residential circuits where a 2-pole breaker would be sufficient. It is also not suitable for applications requiring high-sensitivity protection, such as direct contact protection for individuals, as the 300mA threshold is designed for fire protection and equipment safety rather than life safety.

Key specifications

• Rated current: 100A
• Rated residual operating current: 300mA
• Number of poles: 4
• Type: A

How to use

The installation must be performed by a qualified electrician in accordance with local electrical regulations. The device is designed for mounting on a standard DIN rail within an electrical distribution enclosure. Ensure that all cable connections are tightened to the specified torque to prevent overheating. After installation, the device should be tested using the integrated test button to verify its mechanical functionality and tripping capability.

What to consider before purchase

• Verify that the 300mA sensitivity meets your specific fire protection requirements.
• Ensure the 100A rated current is compatible with your main circuit load.
• Confirm that your installation requires a 4-pole device for three-phase distribution.

Usage recommendations

Regularly test the residual current circuit breaker using the test button at least every six months to ensure the mechanism remains operational and free from debris or oxidation.