Overview
The Cooper Bussmann FRS-R-15 is a Class RK5 Fusetron time-delay, dual-element, current-limiting cartridge fuse engineered for reliable motor and circuit protection. Each box contains 10 units, making it an economical choice for maintenance stocking and panel replacement. This fuse combines traditional brass end caps with a fiberglass tube body to deliver proven performance in industrial and commercial electrical systems.
Key Features
- Dual-element, time-delay construction provides 10 seconds minimum delay at 500% rated current
- Current-limiting design protects downstream components from high fault currents
- UL Class RK5 and CSA certified for safety and compliance
- Ferrule-to-ferrule terminal ends for standard cartridge holders
- 2:1 selective coordination ratio within the RK5 fuse family minimizes nuisance outages
- Brass end caps and fiberglass tube construction for durability
Technical Specifications
- Amperage Rating: 15A
- Voltage Rating (AC): 600V
- Voltage Rating (DC): 300V
- Interrupting Rating: 200 kA (600 VAC) / 20 kA (300 VDC)
- Fuse Class: RK5
- Series: FRS-R (Fusetron)
- Time Delay: 10 seconds at 500% rated current
- Body Diameter: 0.81 inches (20.6 mm)
- Body Length: 5 inches (127 mm)
- Terminal Type: Ferrule end
- Mounting Style: Cartridge holder
- Element Type: Dual element
- Quantity: 10 fuses per box
Typical Applications
- Motor circuits in machine tools and production equipment
- Motor control centers (MCCs) and combination starters
- Power panelboards and distribution systems
- Industrial control circuits subject to motor overload surges
- Equipment requiring short-circuit and overload protection with coordinated response
Compatibility & Replacements
Compatible With
- Standard Class RK5 cartridge fuse holders (0.81″ × 5″)
- Motor control circuits and panelboards with ferrule fuse receptacles
- Any system rated for 600V AC or 300V DC operation
- UL and CSA certified electrical installations
Replaces / Drop-In Replacement For
- Older Cooper Bussmann FRS-R-15 units
- Other Class RK5 15A cartridge fuses with identical dimensions (0.81″ × 5″)
- Verify exact part fit with your system integrator or OEM documentation before ordering
Works With
- UL-listed electrical installations (Guide JDDZ, File E4273)
- CSA-certified systems (Class 1422-01, File 53787)
- CE-marked distribution equipment
- Standard ferrule-terminal fuse holders and bases
