Bussmann Time Delay Fuse FRS-R Series 500A 600VAC/300VDC Class RK5 Dual Element Blade End

Bussmann Time Delay Fuse FRS-R Series 500A 600VAC/300VDC Class RK5 Dual Element Blade End

Heavy-Duty Electrical Protection for High-Current Industrial Applications

The Bussmann Time Delay Fuse FRS-R Series 500A 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

• 500A Current Rating - Handles high-current loads with reliable overcurrent protection for industrial equipment
• Dual Element Design - Provides time delay for motor starting while offering fast fault clearing for short circuits
• Current Limiting Technology - Reduces let-through energy and minimizes arc flash hazards during fault conditions
• 10 Second Time Delay at 500% - Allows motor starting currents while protecting against sustained overloads

Safety & Standards Compliance

• Class RK5 Rating - Meets NEC requirements for selective coordination and electrical safety standards
• 200 kAIC Interrupt Rating at 600V - Safely clears high fault currents in industrial power distribution systems
• CE Marked Compliance - Meets international electrical safety standards for global installations

Technical Specifications

500A amperage rating, 600VAC/300VDC voltage rating, 200 kAIC interrupt rating at 600V, 20 kAIC at 300VDC, Class RK5 fuse classification, blade end x blade end connection, dual element construction, 10 second time delay at 500% rated current, dimensions 1.06" x 1.06" x 5.5", weight 3 lbs, non-indicating design for standard electrical panel installations.

Installation & Setup

1. Verify power is completely disconnected and use proper lockout/tagout procedures before installation
2. Confirm fuse holder is rated for 500A current and 600V voltage 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 according to manufacturer specifications
5. Test installation with appropriate electrical testing equipment before energizing circuit
6. Document installation details and fuse specifications for maintenance records and NEC compliance

Professional Applications

Ideal for:

• Motor Protection Circuits - Large industrial motors, compressors, and high-horsepower equipment requiring time delay protection
• Transformer Primary Protection - Power transformers and distribution transformers in industrial and commercial facilities
• Industrial Control Panels - Main disconnect protection for motor control centers and electrical distribution panels
• Power Distribution Systems - Feeder circuits and branch circuit protection in manufacturing facilities
• Commercial Building Systems - HVAC equipment, elevator motors, and large commercial electrical loads
• Manufacturing Equipment - Production machinery, conveyor systems, and automated industrial equipment
• Electrical Service Entrances - Main electrical service protection for industrial and commercial buildings
• Generator Protection - Backup generator systems and emergency power distribution equipment

Dual Element Time Delay Advantage

The Bussmann FRS-R Series dual element design provides superior selective coordination by allowing temporary overloads during motor starting while providing fast fault clearing for dangerous short circuit conditions. This current limiting technology reduces arc flash energy and enhances electrical safety in industrial installations, making it the preferred choice for motor protection and power distribution applications.

Why Choose Bussmann Quality?

Bussmann's commitment to electrical safety excellence ensures every FRS-R Series fuse meets rigorous UL listing standards and NEC compliance requirements. With proven current limiting technology, reliable overcurrent protection, and industry-leading fault clearing capability, Bussmann fuses provide the electrical safety and system reliability that professional electrical contractors and facility managers trust for critical industrial and commercial installations.