Bussmann Time Delay Fuse FRN-R Series 10A 250VAC/125VDC Class RK5 Dual Element Ferrule End

Bussmann Time Delay Fuse FRN-R Series 10A 250VAC/125VDC Class RK5 Dual Element Ferrule End

Professional-Grade Motor and Circuit Protection with Current Limiting Technology

The Bussmann Time Delay Fuse FRN-R Series delivers superior electrical protection and circuit safety for motor circuits and inductive loads. 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 Time Delay Protection

• Dual Element Design - Provides time delay for motor starting currents while offering fast response to short circuits
• 8 Second Response at 500% - Allows motor starting while protecting against sustained overloads
• Current Limiting Technology - Reduces let-through energy and protects downstream equipment from fault damage
• 200 kAIC Interrupt Rating at 250VAC - Handles high fault currents safely in industrial and commercial applications

Safety & Standards Compliance

• Class RK5 Current Limiting - Meets NEC requirements for motor protection and selective coordination
• CE Marked Certification - Ensures compliance with international electrical safety standards
• Non-Indicating Design - Provides reliable protection without visual indication for standard applications

Technical Specifications

10 ampere rating, 250VAC/125VDC voltage rating, 200 kAIC interrupt rating at 250VAC, Class RK5 current limiting, dual element time delay design, ferrule end connections, 8 second response time at 500% rated current, dimensions 1" x 1" x 5.875", weight 0.294 lb, non-indicating operation.

Installation & Setup

1. Turn off power and verify zero energy state using proper lockout/tagout procedures
2. Remove existing fuse using appropriate fuse pullers to ensure safe handling
3. Inspect fuse holder contacts for corrosion, damage, or loose connections
4. Insert new Bussmann FRN-R fuse ensuring proper ferrule end contact alignment
5. Verify secure mounting and proper electrical contact before energizing circuit
6. Test circuit operation and verify proper motor starting characteristics

Professional Applications

Ideal for:

• Motor Protection Circuits - HVAC motors, pump motors, conveyor systems, and industrial machinery
• Transformer Secondary Protection - Control transformers, lighting transformers, and power distribution
• Control Panel Applications - Motor control centers, electrical panels, and automation systems
• Lighting Circuit Protection - Ballast protection, LED driver circuits, and commercial lighting systems
• Industrial Machinery - Manufacturing equipment, process control, and production line protection
• Commercial Buildings - HVAC systems, elevator controls, and building automation
• Power Distribution - Feeder circuits, branch circuits, and electrical distribution panels
• Electrical Panel Protection - Main panels, sub-panels, and electrical service equipment

Current Limiting Technology Advantage

Bussmann's advanced current limiting technology in the FRN-R series provides superior arc suppression and fault clearing capability. The dual element design ensures selective coordination with upstream protective devices while the 200 kAIC interrupt rating handles high fault currents safely. This combination delivers reliable motor protection with reduced equipment damage during fault conditions.

Why Choose Bussmann Quality?

Bussmann's commitment to electrical safety and NEC compliance makes the FRN-R series the preferred choice for professional electrical installations. With CE marking certification, reliable overcurrent protection, and proven current limiting performance, these time delay fuses provide the electrical system reliability and motor protection that electrical contractors and facility managers trust for critical applications.