Overview
The Bussmann FRN-R-15 is a Fusetronâ„¢ Class RK5 dual-element, time-delay fuse designed for industrial electrical protection. This 15 A fuse features a non-indicating design with an interrupting rating of 200 kA at 250 Vac and 20 kA at 125 Vdc. The ferrule-terminal construction and compact body fit standard fuse holders used in control panels, motor control centers, and machinery disconnects.
Key Features
- Dual-element, time-delay construction provides energy efficient advanced protection
- Delivers 8 seconds minimum time-delay at 500% of rated current, reducing nuisance trips from motor inrush
- Current-limiting design with ferrule-end-to-ferrule-end connection
- UL 248-12 and CSA certified for North American installations
- Suitable for use in power panelboards, combination starters, and machinery disconnects
Technical Specifications
- Rating: 15 Amps
- Voltage: 250 V AC; 125 V DC
- Interrupting Rating: 200 kA at 250 Vac, 20 kA at 125 Vdc
- Physical Dimensions: 0.56 in. diameter, 2 in. overall length
- Weight: 0.05 lb per fuse
- Class: RK5 (Time-Delay, Current-Limiting)
- Terminal Type: Ferrule
- Response Time: 8 seconds at 500% of rated current
Typical Applications
The FRN-R-15 is commonly used in:
- Motor control centers and combination starters
- Power distribution panelboards and switchgear
- Industrial machinery disconnects
- Electrical equipment requiring time-delay overcurrent protection
Compatibility & Replacements
Compatible With
- Standard cartridge fuse holders accepting Class RK5 fuses
- 250Vac and 125Vdc rated electrical circuits
- Industrial control systems and motor starters
- Power distribution equipment
Replaces / Drop-In Replacement For
- Bussmann FRN-R-15 (original and replacement units)
- Other Class RK5 15 A fuses with identical voltage and interrupting ratings
Works With
- UL Class RK5 fuse receptacles and holders
- Power distribution systems rated for 250Vac or 125Vdc
- Electrical systems requiring current-limiting, time-delay protection
