Bussmann Time Delay Fuse FRN-R Series 110A 250VAC/125VDC Class RK5 Dual Element Blade End

Bussmann Time Delay Fuse FRN-R Series 110A 250VAC/125VDC Class RK5 Dual Element Blade End

Professional-Grade Motor and Circuit Protection

The Bussmann Time Delay Fuse FRN-R Series 110A delivers superior electrical protection and circuit safety for motor circuits and high-inrush 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 Time Delay Protection

• Dual Element Design - Provides time delay for motor starting currents while offering fast fault clearing for short circuits
• 110 Ampere Rating - Handles high current loads with reliable overcurrent protection for industrial applications
• 10 Second Time Delay at 500% - Allows motor starting surges while protecting against sustained overloads
• Current Limiting Technology - Reduces let-through energy and limits fault current damage to electrical systems

Safety & Standards Compliance

• Class RK5 Classification - Meets NEC requirements for motor protection and general purpose applications
• CE Marked Compliance - Certified for international electrical safety standards and professional installations
• 200 kAIC Interrupt Rating at 250V - Safely clears high fault currents in industrial electrical systems

Technical Specifications

110 ampere rating, 250VAC/125VDC voltage rating, 200 kAIC interrupt rating at 250V, 20 kAIC at 125VDC, Class RK5 fuse classification, blade end x blade end connection, 10 second response time at 500% rated current, dual element construction, 2 inch length x 0.56 inch width x 0.56 inch height dimensions, 0.5 lb weight, non-indicating design for discrete protection.

Installation & Setup

1. Verify electrical system is de-energized and follow lockout/tagout procedures for safe fuse installation
2. Confirm fuse holder compatibility with blade end connection and Class RK5 dimensions
3. Insert fuse into holder ensuring proper blade contact and secure mechanical connection
4. Verify amperage rating matches motor full load current and NEC sizing requirements
5. Test electrical continuity and proper fuse holder operation before energizing circuit
6. Document installation with fuse specifications for maintenance and troubleshooting records

Professional Applications

Ideal for:

• Motor Protection Circuits - HVAC motors, pump motors, compressor motors, and industrial drive applications
• Transformer Protection - Distribution transformers, control transformers, and power supply circuits
• Control Panel Applications - Motor control centers, electrical panels, and industrial control systems
• Lighting Circuits - High-intensity discharge lighting, ballast protection, and commercial lighting systems
• Industrial Machinery - Manufacturing equipment, conveyor systems, and automated production lines
• Commercial Buildings - HVAC systems, elevator motors, and building automation equipment
• Power Distribution - Feeder circuits, branch circuits, and electrical distribution panels
• Electrical Panels - Main panels, sub-panels, and motor control centers requiring time delay protection

Dual Element Time Delay Advantage

Bussmann dual element technology provides superior selective coordination by allowing harmless motor starting currents while quickly clearing dangerous fault conditions. The time delay element handles temporary overloads while the current limiting element provides fast fault clearing, ensuring optimal electrical system protection and reducing nuisance tripping in motor applications.

Why Choose Bussmann Quality?

Bussmann commitment to CE marked compliance, Class RK5 NEC standards, reliable overcurrent protection, and electrical safety makes this fuse the trusted choice for professional electrical installations. With proven current limiting technology and dual element design, Bussmann fuses deliver the performance and reliability that electrical contractors and facility managers depend on for critical motor protection applications.