BUSSMANN FNQ-R-9 Fuse, 9 A, Non-Indicating, 200 kAIC, 600 V

Bussmann FNQ-R-9 fuse is used in industrial applications to protect electrical circuits. It is designed for solid-state control circuits, variable frequency drives and uninterruptible power supply systems. This fuse guards against overcurrent situations, preventing damage to components in critical systems. This fuse ensures reliable operation in industrial machinery, motor controls and automation systems, where precise circuit protection is essential.

Working Mechanism:

• Inside the module, a low-melting-point element is positioned.
• Normal current flows through the element without interruption.
• When current surpasses the fuse's rating, the element heats up.
• Heating causes the element to melt and break the circuit.
• This disruption shields downstream equipment from damage.

Features:

• This features an AC voltage rating of 600VAC and diameter of 13/32 inches.
• It has a cylindrical body style for easy and compatible installation.
• This fits the rejection-type fuse block style and has no visual indication of fuse status for seamless performance.
• It features a melamine body for increased electrical insulation and durability.
• This fuse comes with dual elements for high reliability and load handling.

Frequently Asked Questions:

Q. How do I replace Bussmann FNQ-R-9 fuse?

A.

• Turn off the power to the circuit for safety.
• Open the fuse holder or disconnect the circuit.
• Remove the old or blown FNQ-R-9 fuse.
• Check holder contacts for corrosion or damage.
• Gently insert the new FNQ-R-9 fuse in the holder.
• Ensure the fuse sits securely in place.
• Close the fuse holder or reconnect the circuit.
• Restore power and test the circuit's functionality.
• Observe the circuit to confirm proper operation.

Q. What factors should I consider while choosing a Class CC fuse?

A.

• Select a suitable current rating for your circuit's maximum current.
• Ensure the fuse can handle your circuit's voltage level.
• Choose based on your specific application (industrial / commercial).
• Verify if the fuse can safely interrupt your system's maximum fault current.
• Match the fuse's time-current curve with your circuit's characteristics.
• Check if the fuse size fits available space and mounting requirements.
• Consider environmental factors like temperature and humidity.

Q. How do I maintain Bussmann FNQ-R-9 fuse?

A.

• Power off and de-energize the circuit.
• Wear safety gear like gloves and glasses.
• Identify the Bussmann FNQ-R-9 fuse requiring maintenance.
• Carefully extract the fuse from its holder.
• Inspect for damage, discoloration, or melting.
• If damaged, replace with an exact match.
• Wipe holder's contacts if dirty or corroded.
• Reinsert the fuse into the holder.