Bussmann Time Delay Fuse FRN-R Series 600A 250VAC/125VDC Class RK5 Dual Element Blade End

Bussmann Time Delay Fuse FRN-R Series 600A 250VAC/125VDC Class RK5 Dual Element Blade End

Heavy-Duty Electrical Protection for High-Current Applications

The Bussmann Time Delay Fuse FRN-R Series 600A delivers superior electrical protection and circuit safety for high-current industrial applications. This Class RK5 time delay fuse features dual element current limiting technology designed for electrical contractors, industrial facilities, and commercial installations, providing the reliable overcurrent protection and industry-leading safety that electrical professionals demand for motor circuits and power distribution systems.

Professional Features & Benefits

Advanced Current Protection

• 600A Current Rating - Handles high-current loads with reliable overcurrent protection for industrial equipment
• Dual Element Design - Provides time delay for motor starting currents while offering fast response to short circuits
• Current Limiting Technology - Reduces let-through energy and protects downstream equipment from fault damage
• 10 Second Time Delay at 500% - Allows motor starting and temporary overloads while protecting against sustained overcurrent conditions

Safety & Standards Compliance

• Class RK5 Rating - Meets NEC requirements for motor protection and power distribution applications
• 200 kAIC Interrupt Rating at 250V - Safely clears high fault currents in industrial electrical systems
• CE Marked Compliance - Meets international electrical safety standards for global installations

Technical Specifications

600A amperage rating, 250VAC/125VDC voltage rating, 200 kAIC interrupt rating at 250V, 20 kAIC at 125VDC, Class RK5 fuse classification, blade end x blade end connection, 10 second time delay at 500% rated current, dual element construction, non-indicating design, dimensions 3.0" L x 0.81" W x 0.81" H, weight 0.11 lb, standard packaging.

Installation & Setup

1. Verify power is OFF and use proper lockout/tagout procedures before installation
2. Confirm fuse holder is rated for 600A and Class RK5 fuses with proper blade end connections
3. Insert fuse into holder ensuring proper blade end contact and secure mounting
4. Verify all connections are tight and properly torqued per manufacturer specifications
5. Test installation with appropriate electrical testing equipment before energizing
6. Document installation per NEC requirements and facility maintenance procedures

Professional Applications

Ideal for:

• Motor Protection Circuits - Large industrial motors, pumps, compressors, and HVAC equipment requiring time delay protection
• Power Distribution Systems - Main distribution panels, switchgear, and electrical substations handling high current loads
• Industrial Machinery - Manufacturing equipment, conveyor systems, and automated production lines
• Commercial Buildings - Large facility electrical systems, elevator controls, and building automation equipment
• Transformer Circuits - Primary protection for power transformers and distribution transformers
• Control Panels - Motor control centers, variable frequency drives, and industrial control systems
• Lighting Circuits - High-intensity discharge lighting systems and large commercial lighting installations
• Electrical Panels - Main breaker panels, load centers, and electrical distribution equipment

Dual Element Time Delay Advantage

The dual element design provides superior selective coordination by allowing temporary overloads while quickly clearing dangerous short circuits. The time delay element handles motor starting currents and brief overloads, while the current limiting element provides fast fault clearing to protect equipment and maintain electrical system integrity.

Why Choose Bussmann Quality?

Bussmann's commitment to electrical safety includes rigorous testing for NEC compliance, reliable overcurrent protection technology, and proven performance in demanding industrial applications. Each fuse undergoes comprehensive quality control to ensure consistent protection and long-term reliability for professional electrical installations.