Bussmann FRN-R Time Delay Fuse 50A Class RK5 Dual Element Non-Indicating

Bussmann FRN-R Time Delay Fuse 50A Class RK5 Dual Element Non-Indicating

Professional Time Delay Protection for Motor and Inductive Load Applications

The Bussmann FRN-R Time Delay Fuse delivers reliable overcurrent protection with dual element design for motor circuits and inductive loads. This Class RK5 fuse features 50A rating with ferrule end connections, providing 10 second time delay at 500% overload and high interrupt capacity of 200 kAIC at 250V and 20 kAIC at 125 Vdc for comprehensive electrical system protection.

Professional Features & Benefits

• 50A Current Rating: Provides precise overcurrent protection for medium-duty motor and lighting circuits with reliable amperage capacity.
• Class RK5 Time Delay: Offers superior coordination with downstream protective devices while allowing temporary motor starting currents.
• Dual Element Design: Combines time delay for overload protection with fast response to short circuit conditions for comprehensive system safety.
• High Interrupt Rating: 200 kAIC at 250V and 20 kAIC at 125 Vdc capability handles high fault currents in demanding electrical environments.
• Ferrule End Connections: Ensures secure, reliable electrical connections in standard fuse holders and disconnect switches.
• 10 Second Time Delay: Allows motor starting transients while providing fast protection against sustained overloads at 500% rating.
• CE Marked Compliance: Meets international safety standards for global installation confidence and regulatory compliance.

Technical Specifications

• Amperage Rating: 50 A
• Class: Class RK5
• Compliances: CE Marked
• Connection: Ferrule end x ferrule end
• Department: Electrical
• Fuse Indicator: Non-indicating
• Interrupt Rating: 20 kAIC at 125 Vdc
• Number Of Elements: Dual
• Packaging Type: Standard
• Product Group: Fuses
• Product Height: .81 in
• Product Length Depth: 3 in
• Product Subgroup: Time Delay Fuses
• Product Type: Time Delay Fuses
• Product Weight: 3.1 lb
• Product Width: .81 in
• Response Time: 10 sec at 500%
• Voltage Rating: 250 Vac, 125 Vdc

Installation & Operation

1. Mount the unit in a suitable location with appropriate clearance and access for connections and service.
2. Connect utility and load conductors following applicable guidelines and the manufacturer's instructions.
3. Wire generator or power input according to the provided voltage/phase specifications and compatible capacity.
4. Configure any available load management or control features as supported by the provided specifications.
5. Test automatic transfer or operational functionality and verify proper performance before placing into service.
6. Complete final inspection and follow ongoing maintenance practices appropriate to the product category.

Professional Applications

• Motor Control Centers and Starter Panels
• Industrial Machinery Protection
• HVAC Equipment and Compressor Circuits
• Commercial Lighting Systems
• Manufacturing and Process Equipment
• Pump and Fan Motor Applications
• Electrical Distribution Panels

Why Choose Bussmann Quality?

Bussmann time delay fuses provide proven reliability with CE marked compliance and precision-engineered dual element construction. The compact .81 x 3 inch design offers professional-grade protection with high interrupt capacity, ensuring dependable performance in critical electrical applications where motor starting characteristics and fault protection are essential.