FNQ-R-3/4

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FNQ-R-3/4 fuses, also known as Class RK5 dual-element fuses, are specialty fuses which offer reliable branch circuit protection for both residential and commercial applications. These fuses are designed to provide protection for branch circuits using UL 489 devices, providing for maximum current control. Available in two different styles, FNQ-R fuses offer both low voltage and high voltage applications.

The FNQ-R-3/4 protection is provided by a dual-element design consisting of a high-energy element and a low-energy element. The high-energy element will open first in the event of a fault, and the low-energy element will open a few seconds later. This design provides for superior protection against arc-over faults and overvoltages on the protected branch circuit. The high-energy element also trips at a much higher current than the low-energy element, affording better protection against short circuits.

The FNQ-R-3/4 fuses are also designed to protect adjacent circuits from damage or outages due to an overcurrent event on a single branch circuit. In addition, the FNQ-R fuses are easy to install, as they mount on any UL 489 device without additional parts or modifications.

The rated voltage of FNQ-R-3/4 fuses is 600 volts AC and 600 volts DC, and the maximum interrupting current is 10,000 amperes. Available in two sizes, the FNQ-R-3/4 model is rated for 100 amperes and the FNQ-R-2/3 model is rated for 150 amperes. The time delay on these fuses is 0.2 seconds to 120 seconds.

In addition to its excellent current control and protection capabilities, the FNQ-R-3/4 fuse is also designed for superior safety. All FNQ-R fuses meet Underwriters Laboratories standard UL 248-14, making them an ideal choice for safety and electrical protection in all types of environments.

FNQ-R-3/4 fuses are ideal for applications which require high current capacity, fast response time, and reliable protection against fires and outages. These specialty fuses also provide superior branch circuit protection in a variety of climates and jurisdictions. FNQ-R-3/4 fuses are easy to install and are available in a variety of lengths, amperage ratings, and time delays.

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