Bussmann Time Delay Fuse FRS-R Series 100A 600VAC/300VDC Class RK5 Dual Element Blade End Non-Indicating

Bussmann Time Delay Fuse FRS-R Series 100A 600VAC/300VDC Class RK5 Dual Element Blade End Non-Indicating

Professional-Grade Electrical Protection for Motor and Transformer Circuits

The Bussmann Time Delay Fuse FRS-R Series delivers superior electrical protection and circuit safety for motor protection and transformer 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.

Professional Features & Benefits

Advanced Current Limiting Protection

• Dual Element Design - Provides time delay for motor starting currents while offering fast response to short circuit faults
• 200 kAIC Interrupt Rating at 600VAC - Safely clears high fault currents in industrial electrical systems
• Class RK5 Current Limiting - Reduces let-through energy and protects downstream equipment from damaging fault currents
• 10 Second Time Delay at 500% - Allows motor starting and transformer inrush without nuisance tripping

Safety and Standards Compliance

• CE Marked Certification - Meets European safety standards for electrical protection devices
• Non-Indicating Design - Professional blade end construction for secure panel mounting
• NEC Compliant Installation - Designed for code-compliant electrical installations and safety

Technical Specifications

100 ampere rating at 600VAC/300VDC operating voltage with 200 kAIC interrupt capacity at 600VAC and 20 kAIC at 300VDC. Class RK5 current limiting fuse with dual element time delay characteristics. Blade end x blade end connection type with 10 second response time at 500% rated current. Compact dimensions of 5 inches length x 0.81 inches width x 0.81 inches height, weighing 0.4 pounds for standard electrical panel installation.

Installation & Setup

1. Verify electrical system is de-energized and follow lockout/tagout procedures for safe installation
2. Confirm fuse holder compatibility with blade end connection type and 100A rating
3. Insert fuse into holder ensuring proper blade contact and secure mounting
4. Verify correct amperage rating matches circuit protection requirements
5. Test installation with appropriate electrical testing equipment before energizing
6. Document installation per NEC requirements and facility maintenance records

Professional Applications

Ideal for:

• Motor Protection Circuits - HVAC motors, industrial machinery, and pump applications requiring time delay protection
• Transformer Primary Protection - Distribution transformers and control transformers with inrush current considerations
• Industrial Control Panels - Manufacturing equipment and process control systems requiring reliable overcurrent protection
• Commercial Lighting Circuits - High-intensity discharge lighting and LED driver protection applications
• Power Distribution Systems - Electrical panels and switchgear requiring current limiting protection
• HVAC Equipment Protection - Air conditioning units, heat pumps, and ventilation system motor protection
• Industrial Machinery Circuits - Conveyor systems, packaging equipment, and automated manufacturing protection
• Electrical Panel Applications - Main distribution panels and sub-panels requiring Class RK5 protection

Dual Element Current Limiting Advantage

Bussmann dual element technology provides superior selective coordination with upstream and downstream protective devices. The time delay element handles motor starting currents and temporary overloads while the current limiting element provides fast fault clearing for short circuits. This combination ensures reliable motor protection while maintaining electrical system coordination and minimizing nuisance tripping in industrial applications.

Why Choose Bussmann Quality?

Bussmann commitment to electrical safety includes rigorous testing for UL listing compliance, NEC code requirements, and reliable overcurrent protection performance. Every FRS-R series fuse delivers consistent current limiting protection, proven fault clearing capability, and the electrical safety standards that professional contractors and facility managers trust for critical electrical installations and motor protection applications.