Bussmann Time Delay Fuse FRS-R Series 90A 600VAC/300VDC Class RK5 Dual Element Blade End

Bussmann Time Delay Fuse FRS-R Series 90A 600VAC/300VDC Class RK5 Dual Element Blade End

Professional-Grade Motor and Circuit Protection with Current Limiting Technology

The Bussmann Time Delay Fuse FRS-R Series 90A delivers superior electrical protection and circuit safety for motor circuits and 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.

Professional Features & Benefits

Advanced Current Limiting Protection

• Dual Element Design - Provides time delay for motor starting currents while offering fast response to short circuits
• 200 kAIC Interrupt Rating at 600VAC - Superior fault current clearing capability for high-energy electrical systems
• 10 Second Time Delay at 500% - Allows motor starting transients while protecting against sustained overloads
• Current Limiting Technology - Reduces let-through energy and minimizes arc flash hazards during fault conditions

Safety and Standards Compliance

• Class RK5 UL Listed - Meets stringent electrical safety standards for commercial and industrial installations
• CE Marked Compliance - International safety certification for global electrical applications
• Non-Indicating Design - Professional-grade construction for reliable operation without visual indication requirements

Technical Specifications

90 ampere rating at 600VAC/300VDC, Class RK5 current limiting fuse with 200 kAIC interrupt rating at 600VAC and 20 kAIC at 300VDC. Dual element time delay design with 10 second response at 500% rated current. Blade end connections for secure panel mounting. Compact dimensions: 5 inches length x 0.81 inches width x 0.81 inches height, weighing 0.4 pounds for easy installation in electrical panels and switchgear.

Installation & Setup

1. Verify electrical system is de-energized and follow NFPA 70E safety procedures before installation
2. Confirm fuse amperage rating matches circuit protection requirements and motor full load amperage
3. Insert blade ends securely into fuse clips ensuring proper electrical contact and mechanical retention
4. Verify fuse class compatibility with existing fuse holders and electrical panel specifications
5. Test circuit operation and verify proper overcurrent protection coordination with upstream devices
6. Document installation per NEC requirements and facility electrical maintenance procedures

Professional Applications

Ideal for:

• Motor Protection Circuits - HVAC motors, pump motors, compressor motors, and industrial drive applications
• Transformer Secondary Protection - Distribution transformers, control transformers, and power supply circuits
• Control Panel Applications - Motor control centers, variable frequency drives, and automation equipment
• Lighting Circuit Protection - Commercial lighting panels, emergency lighting systems, and exterior lighting circuits
• Industrial Machinery - Manufacturing equipment, conveyor systems, and process control applications
• Commercial Building Systems - HVAC equipment, elevator motors, and building automation circuits
• Power Distribution Panels - Electrical switchgear, distribution boards, and load center applications
• Electrical Panel Protection - Branch circuit protection, feeder circuits, and electrical service equipment

Current Limiting Technology Advantage

Bussmann FRS-R series fuses utilize advanced current limiting technology that significantly reduces let-through energy during fault conditions. The dual element design provides selective coordination with upstream protective devices while offering superior arc flash mitigation. This current limiting capability protects downstream electrical equipment from damaging fault currents and reduces arc flash incident energy levels for enhanced electrical worker safety.

Why Choose Bussmann Quality?

Bussmann demonstrates unwavering commitment to UL listing standards, NEC compliance, and reliable overcurrent protection for professional electrical installations. Our time delay fuses provide proven electrical safety performance with current limiting technology that electrical contractors and facility managers trust for critical motor protection and industrial circuit applications requiring superior fault clearing capability and selective coordination.