Bussmann Time Delay Fuse FRN-R Series 80A 250VAC/125VDC Class RK5 Dual Element Blade End

Bussmann Time Delay Fuse FRN-R Series 80A 250VAC/125VDC Class RK5 Dual Element Blade End

Professional-Grade Motor and Circuit Protection with Current Limiting Technology

The Bussmann Time Delay Fuse FRN-R Series 80A 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 250VAC - Superior fault current clearing capability for industrial electrical systems
• 10 Second Time Delay at 500% - Allows motor starting while protecting against sustained overloads
• Current Limiting Technology - Reduces let-through energy and protects downstream equipment from fault damage

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
• NEC Compliant Design - Ensures code compliance for professional electrical installations

Technical Specifications

80 ampere rating, 250VAC/125VDC voltage rating, 200 kAIC interrupt rating at 250VAC, Class RK5 current limiting, blade end x blade end connection, dual element construction, 10 second time delay at 500%, non-indicating design, dimensions 0.81" x 0.81" x 3", weight 0.32 lb, standard packaging.

Installation & Setup

1. Turn off power and verify zero energy state using proper lockout/tagout procedures
2. Remove existing fuse using appropriate fuse pullers and safety equipment
3. Inspect fuse holder contacts for proper alignment and clean connections
4. Insert new Bussmann FRN-R fuse ensuring proper blade end orientation
5. Verify secure connection and proper seating in fuse holder
6. Restore power and test circuit operation following NEC guidelines

Professional Applications

Ideal for:

• Motor Protection Circuits - HVAC motors, pump motors, conveyor systems, and industrial machinery
• Transformer Secondary Protection - Distribution transformers and control transformers up to 80A
• Control Panel Applications - Industrial control panels and automation systems
• Lighting Circuit Protection - Commercial and industrial lighting distribution panels
• Power Distribution Systems - Electrical panels and switchgear applications
• Industrial Machinery - Manufacturing equipment and process control systems
• Commercial Buildings - Office buildings, retail facilities, and institutional applications
• HVAC Systems - Air handling units, chillers, and building automation systems

Dual Element Current Limiting Advantage

Bussmann dual element technology provides superior motor protection by combining time delay characteristics for starting currents with fast-acting short circuit protection. The current limiting design reduces arc energy and protects downstream components, while the 200 kAIC interrupt rating ensures reliable fault clearing in high-capacity electrical systems.

Why Choose Bussmann Quality?

Bussmann commitment to UL listing, NEC compliance, and reliable overcurrent protection makes this fuse the preferred choice for electrical professionals. With proven current limiting technology, superior interrupt ratings, and consistent performance in demanding industrial applications, Bussmann fuses deliver the electrical safety and system reliability that contractors and facility managers trust.