Bussmann Time Delay Fuse FRN-R Series 175A 250VAC/125VDC Class RK5 Dual Element Blade End

Bussmann Time Delay Fuse FRN-R Series 175A 250VAC/125VDC Class RK5 Dual Element Blade End

Professional-Grade Motor and Transformer Circuit Protection

The Bussmann Time Delay Fuse FRN-R Series 175A delivers superior electrical protection and circuit safety for motor circuits, transformers, 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 on overloads while offering fast clearing on short circuits for optimal motor protection
• 10 Second Response Time at 500% - Allows motor starting currents while protecting against sustained overloads
• 175A Current Rating - Handles high-capacity motor and transformer applications with reliable overcurrent protection
• Current Limiting Technology - Reduces let-through energy and limits fault current to protect downstream equipment

Safety & Standards Compliance

• Class RK5 Classification - Meets NEC requirements for motor circuit protection with selective coordination capability
• 200 kAIC Interrupt Rating at 250V - Provides exceptional fault clearing capability for industrial electrical systems
• CE Marked Compliance - Ensures international electrical safety standards for global installations

Technical Specifications

175 ampere rating, 250VAC/125VDC voltage rating, 200 kAIC interrupt rating at 250V, 20 kAIC at 125VDC, Class RK5 current limiting, 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, 0.5 lb weight, non-indicating design.

Installation & Setup

1. Verify power is OFF and use proper lockout/tagout procedures before fuse installation
2. Confirm fuse holder is rated for 175A and Class RK5 fuses with proper blade end connections
3. Insert fuse ensuring proper blade end contact with fuse holder terminals
4. Verify secure mechanical connection and proper fuse seating in holder
5. Test installation with appropriate electrical testing equipment before energizing
6. Document installation per NEC requirements and facility electrical safety procedures

Professional Applications

Ideal for:

• Motor Protection Circuits - Large motor starters, HVAC equipment, industrial machinery with high starting currents
• Transformer Protection - Distribution transformers, control transformers, and power supply applications
• Industrial Control Panels - Motor control centers, variable frequency drives, and automation equipment
• Commercial Buildings - Elevator motors, escalator drives, and building automation systems
• Manufacturing Equipment - Production machinery, conveyor systems, and process control equipment
• Power Distribution - Feeder circuits, branch circuits, and electrical panel protection
• HVAC Systems - Large air handling units, chiller systems, and commercial refrigeration
• Pump Applications - Water treatment, irrigation systems, and industrial pumping stations

Dual Element Current Limiting Advantage

Bussmann dual element technology provides superior motor protection by combining time delay characteristics for overload protection with fast clearing capability for short circuit faults. The current limiting design reduces arc energy and limits fault current, protecting downstream equipment while maintaining selective coordination with upstream protective devices.

Why Choose Bussmann Quality?

Bussmann commitment to electrical safety includes rigorous testing for NEC compliance, reliable overcurrent protection, and professional-grade construction. Each FRN-R series fuse delivers consistent performance in demanding electrical environments, providing the circuit protection reliability that electrical contractors and facility managers trust for critical motor and transformer applications.