Eaton FAZ-B25/2 Miniature Circuit Breaker, 2-Pole, B-Curve, 25A, 15kA

The Eaton FAZ-B25/2 is a high-performance 2-pole miniature circuit breaker engineered to provide robust overcurrent and short-circuit protection in electrical systems. Designed for demanding environments, this device ensures the safety and integrity of electrical circuits by automatically disconnecting power when faults are detected. It is built to meet rigorous industrial and commercial standards, offering reliable performance for AC power distribution networks.

Advantages

This circuit breaker stands out due to its high breaking capacity of 15kA, which allows it to handle significant fault currents safely. The B-curve tripping characteristic makes it particularly effective for protecting circuits with low inrush currents, such as resistive loads or lighting systems. Its 2-pole configuration allows for the simultaneous disconnection of both phase and neutral conductors, enhancing safety during maintenance or fault conditions. The compact design facilitates easy installation in standard distribution boards, while the durable construction ensures long-term operational reliability.

Suitable for

• Industrial electrical distribution panels
• Commercial building power systems
• Protection of resistive loads and lighting circuits
• General AC power distribution infrastructure

When it may not be suitable

This device is not intended for use in DC systems, as it is specifically rated for AC applications. Furthermore, the B-curve characteristic may not be suitable for circuits with high inrush currents, such as those powering large motors or transformers, where a C or D curve breaker would be more appropriate to prevent nuisance tripping.

Key specifications

• Number of poles: 2
• Rated current: 25A
• Tripping characteristic: B-curve
• Breaking capacity: 15kA
• System type: AC

How to use

The Eaton FAZ-B25/2 should be installed by a qualified electrician in accordance with local electrical regulations. It is designed for mounting on a standard DIN rail within an enclosure. Ensure that the supply cables are correctly sized for a 25A load and securely fastened to the terminals. Once installed, the toggle switch can be used to manually turn the circuit on or off, while the internal mechanism will automatically trip the switch to the off position in the event of an overcurrent or short-circuit.

What to consider before purchase

• Verify that the 25A rating matches the requirements of your specific circuit load.
• Confirm that the B-curve tripping characteristic is appropriate for the equipment being protected.
• Ensure the 15kA breaking capacity meets the short-circuit current levels of your electrical installation.
• Check that the 2-pole configuration is compatible with your wiring layout.

Usage recommendations

Regularly inspect the circuit breaker for signs of physical damage or overheating. It is recommended to perform periodic testing of the installation to ensure that the protective device remains functional and that all terminal connections remain tight to prevent resistance-related issues.