Cooper Bussmann FRS-R-15/100 RK5 Time Delay Fuse 0.15A

Product Description

The COOPER BUSSMANN FRS-R-15/100 is a cartridge-style, time delay fuse rated at 0.15 amps in Fuse Class RK5, designed for general-purpose overcurrent protection in electrical distribution systems. The fuse features a two-element construction that allows it to ride through brief inrush currents without nuisance tripping, while still providing reliable protection against sustained overloads and short circuits. At 5 inches overall length and 20.6 mm in diameter, it mounts in a standard fuse holder. It carries CE, CSA, and UL listings, making it suitable for installations where code-compliant components are required. Licensed electricians and industrial maintenance technicians are the primary installers.

This fuse is suited for residential, commercial, and light industrial electrical panels and equipment requiring Class RK5 time delay protection. Its non-indicating body means fuse condition must be confirmed with a multimeter or continuity tester rather than a visual indicator. The RK5 class rating limits its interchangeability with other fuse classes, so verify the fuse holder and circuit specifications before installation. It is appropriate for motor branch circuits, transformer primaries, and other loads with high inrush characteristics where a time delay element prevents unnecessary outages.

Key Features

• Class RK5 time delay, two-element cartridge construction tolerates inrush without nuisance tripping
• Rated 0.15 amps with an interrupting rating of 20 kA at DC 200 volts RMS
• Overall length of 5 inches (127 mm) with 20.6 mm diameter body fits standard RK5 fuse holders
• Non-indicating design — fuse state verified by testing, not visual inspection
• CE Certified, CSA C22.2 No. 248.12 Certified, and UL Listed 248-12 Class RK5
• UNSPSC Code 39121605 for procurement and inventory classification

Compatibility

Designed as an OEM-style replacement for Class RK5 cartridge fuse holder applications requiring a 0.15-amp time delay fuse with a 5-inch body length and 20.6 mm diameter.

Installation Notes

Installation should be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and any applicable local codes. Always de-energize and lock out the circuit before removing or installing the fuse. Confirm that the fuse holder is rated for Class RK5 fuses and that the replacement amperage matches the circuit design exactly. Do not substitute a fuse of a different class or amperage rating even if the physical dimensions appear similar.