Overview
The Bussmann FRN-R-1-6/10 Fusetron is a time-delay, dual-element Class RK5 fuse designed for general-purpose motor overload and short-circuit protection in industrial and commercial electrical systems. This current-limiting fuse delivers dependable performance in branch circuits and motor starters where transient inrush currents are common.
Key Features
- Dual-element time-delay design holds 5× rated current for minimum 8 seconds, protecting against nuisance trips
- Class RK5 current-limiting technology reduces peak let-through current and downstream damage risk
- Ferrule-end cartridge construction fits standard RK5 clips and fuse holders
- Non-indicating body; operates reliably in any orientation
- 200 kAIC at 250VAC; 20 kAIC at 125VDC interrupt rating
Technical Specifications
- Rated Current: 1.6 A (1-6/10 A)
- Voltage: 250VAC, 125VDC
- Class: RK5 (dual-element, time-delay)
- Interrupt Rating: 200 kA at 250VAC; 20 kA at 125VDC
- Time-Delay Response: 8 seconds minimum at 500% rated current
- Body Style: Cartridge, ferrule end × ferrule end
- Dimensions: 0.56″ diameter × 2.0″ length (14.22 × 50.8 mm)
- Certifications: UL Listed (Std. 248-12, Guide JDDZ, File E4273); CSA Certified (C22.2 No. 248.12, Class 1422-02, File 53787); CE Marked
Typical Applications
- Motor branch circuit protection in industrial machinery and equipment
- Control panel and transformer feeder circuits
- General-purpose equipment rated 250V or below
- HVAC units, compressors, and pump protection
- Commercial lighting and heating circuits
Compatibility & Replacements
Compatible With
- RK5 Class fuse holders and clips (standard cartridge style)
- Eaton/Bussmann series fuse blocks and switches rated for RK5 fuses
- Industrial control systems and motor starters
- Equipment designed for 250VAC or 125VDC operation
Replaces / Drop-In Replacement For
- FRN-R 1.6A (alternate part number format)
- FRN-R-1-6/10A
- Littelfuse FLNR-1-6/10
- Mersen TR-R 1-6/10
Works With
- Class RK5 rated electrical panels and disconnect switches
- Eaton/Bussmann Fusetron family of time-delay fuses
- Standard motor control centers and industrial fuse blocks
- Motor overload relay packages and soft starters
