Bussmann Time Delay Fuse FRN-R Series 35A 250VAC/125VDC Class RK5 Dual Element Ferrule End

Bussmann Time Delay Fuse FRN-R Series 35A 250VAC/125VDC Class RK5 Dual Element Ferrule End

Professional-Grade Motor and Circuit Protection

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
• 10 Second Response at 500% - Allows motor starting surges while protecting against sustained overloads
• Current Limiting Technology - Reduces let-through energy and protects downstream equipment from fault damage
• 200 kAIC Interrupt Rating at 250V - Handles high fault currents safely in demanding electrical applications

Safety & Standards Compliance

• Class RK5 Classification - Meets NEC requirements for motor protection and selective coordination
• CE Marked Certification - Ensures compliance with international electrical safety standards
• Non-Indicating Design - Professional appearance for control panels and electrical enclosures

Technical Specifications

35 ampere rating, 250VAC/125VDC voltage rating, 200 kAIC interrupt rating at 250V and 20 kAIC at 125VDC, Class RK5 current limiting fuse, ferrule end connections, dual element time delay design, 10 second response time at 500% rated current, dimensions 0.81" x 0.81" x 3.0", weight 1.95 lbs, non-indicating visual status.

Installation & Setup

1. Turn off power and verify zero energy state using proper lockout/tagout procedures
2. Select appropriate fuse holder rated for 35A and Class RK5 fuses with ferrule end connections
3. Insert fuse ensuring proper contact with ferrule end terminals in fuse holder
4. Verify secure mounting and proper electrical connections before energizing circuit
5. Test circuit operation and confirm proper overcurrent protection functionality
6. Document installation per NEC requirements and facility maintenance records

Professional Applications

Ideal for:

• Motor Protection Circuits - HVAC motors, pump motors, conveyor systems, and industrial machinery drives
• Transformer Secondary Protection - Control transformers, lighting transformers, and power distribution transformers
• Control Panel Applications - Motor control centers, variable frequency drives, and automation equipment
• Lighting Circuit Protection - Commercial lighting panels, emergency lighting systems, and exterior lighting
• Industrial Machinery - Manufacturing equipment, processing machinery, and production line protection
• Commercial Building Systems - HVAC equipment, elevator motors, and building automation systems
• Power Distribution Panels - Electrical panels, switchboards, and load centers requiring time delay protection
• Inductive Load Protection - Solenoids, contactors, relays, and other electromagnetic devices

Current Limiting Technology Advantage

Bussmann's advanced current limiting technology in the FRN-R series provides superior arc suppression and fault current limitation, reducing let-through energy during short circuit conditions. The dual element design combines time delay characteristics for motor starting with fast acting protection against short circuits, ensuring optimal selective coordination in electrical distribution systems while protecting valuable equipment from damage.

Why Choose Bussmann Quality?

Bussmann demonstrates unwavering commitment to electrical safety through rigorous testing, CE marking compliance, and adherence to NEC standards. Our time delay fuses provide reliable overcurrent protection for professional electrical installations, featuring current limiting technology that electrical contractors trust for motor protection, transformer circuits, and industrial applications requiring precise time delay characteristics and fault clearing capability.