BUSSMANN FNQ-R-25 Fuse, 25 A, Non-Indicating, 200 kAIC, 600 V

Bussmann FNQ-R-25 fuse is designed to withstand temporary inrush currents, ensuring reliable circuit protection during motor and equipment startups. This fuse is ideal for industrial and commercial settings where circuit protection is crucial.

Working Mechanism:

• Under normal conditions where current remains within its 25A rating, both elements remain intact, permitting uninterrupted current flow.
• In the event of an overcurrent, like a short circuit or an overload beyond its rating, excessive heat causes one or both elements to melt and open.
• The dual-element design distinguishes between quick response to short-term surges and slightly delayed response to sustained overloads.
• When the elements open, they break the circuit, halting current flow and isolating the fault or overloading to protect downstream equipment and wiring.

Features:

• Bussmann FNQ-R-25 fuse features a dual-element design, enhancing its ability to protect against both short circuits and overloads efficiently.
• It comes with an interrupt rating of 200kA at 600VAC, ensuring reliable circuit interruption even in demanding electrical systems.
• This fuse offers time-delay protection, making it resistant to temporary inrush currents and preventing nuisance-blowing during motor and equipment startups.
• It features melamine body for durability and has a non-indicating design to work seamlessly with indicating fuse blocks or covers for blown fuse identification.

Compatible Accessories:

• Bussmann CHM3DIU Fuse Holder: It is a secure and convenient means of installing and replacing the fuse within electrical systems.
• Bussmann CHCC3DU Fuse Holder: This non-indicating fuse holder is a versatile component that facilitates the secure installation of fuses in electrical circuits.

Frequently Asked Questions:

Q. What does non-indicating mean for Bussmann FNQ-R-25 fuse?

A. It lacks a built-in visual indicator to show its status, requiring manual inspection to determine its condition.

Q. How do I know if non-indicating fuse has tripped and needs replacement?

A. Since it's non-indicating, manual inspection is necessary; if the element is melted, replacement is required for continued protection.

Q. What type of mounting does Bussmann FNQ-R-25 non-indicating fuse offer?

A. This fuse allows for panel mounting for easy and secure installation.

Q. How do I install Bussmann CHCC3DU fuse holder in my electrical system?

A. This fuse holder can typically be found in the product's datasheet or user manual. It generally involves mounting the holder securely, connecting it to the appropriate electrical terminals and inserting the compatible fuses.

Q. What are the safety precautions while using this fuse holder and FNQ-R-25 fuses?

A.

• Turn off power before working with fuses.
• Use the correct fuse type with the right specifications and amperage rating.
• Inspect fuses for damage before installation.
• Ensure proper sizing of fuses to match current requirements.
• Never bypass fuses or replace them with conductive materials.
• Use dedicated fuse holders or blocks.
• Work on de-energised circuits when replacing fuses.
• Implement lockout / tagout procedures when needed.
• Wear appropriate PPE, such as insulated gloves and safety glasses.
• Maintain clear labels and records of fuse maintenance.
• Use a multimeter to check for voltage before working.
• Comply with local electrical codes and regulations.