Bussmann Time Delay Fuse FRS-R Series 70A 600VAC/300VDC Class RK5 Dual Element Blade End

Bussmann Time Delay Fuse FRS-R Series 70A 600VAC/300VDC Class RK5 Dual Element Blade End

Professional-Grade Motor and Circuit Protection with Current Limiting Technology

The Bussmann Time Delay Fuse FRS-R Series 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 Motor Protection

• 70A Current Rating - Handles high-current motor loads with precise overcurrent protection
• Dual Element Design - Provides time delay for motor starting while offering fast short-circuit protection
• 10 Second Time Delay at 500% - Allows motor inrush currents while protecting against sustained overloads
• Current Limiting Technology - Reduces let-through energy and protects downstream equipment

Safety & Standards Compliance

• Class RK5 Rating - Meets NEC requirements for motor branch circuit protection
• 200 kAIC at 600V Interrupt Rating - Safely clears high fault currents in industrial applications
• CE Marked Compliance - Meets international electrical safety standards

Technical Specifications

Current Rating: 70 amperes, Voltage Rating: 600VAC/300VDC, Interrupt Rating: 200 kAIC at 600V/20 kAIC at 300VDC, Fuse Class: RK5, Response Time: 10 seconds at 500% rated current, Element Type: Dual element time delay, Connection: Blade end terminals, Dimensions: 5.0" L x 0.81" W x 0.81" H, Weight: 0.4 lbs, Indicator: Non-indicating design

Installation & Setup

1. Verify power is OFF and use proper lockout/tagout procedures before installation
2. Confirm fuse holder is rated for 70A and Class RK5 fuses
3. Insert fuse with blade ends fully seated in fuse holder terminals
4. Ensure proper torque on fuse holder connections per manufacturer specifications
5. Verify fuse orientation matches circuit polarity requirements
6. Test installation with appropriate electrical testing equipment before energizing

Professional Applications

Ideal for:

• Motor Protection Circuits - HVAC motors, pump motors, compressor motors, and industrial drive systems
• Industrial Machinery - Manufacturing equipment, conveyor systems, and automated production lines
• Commercial Buildings - Elevator motors, escalator drives, and building automation systems
• Power Distribution - Feeder circuits, branch circuits, and electrical panel protection
• Control Panels - Motor control centers, variable frequency drives, and starter circuits
• Lighting Circuits - High-intensity discharge lighting and large lighting contactors
• Transformer Circuits - Primary protection for distribution and control transformers
• Electrical Panels - Main breaker panels, sub-panels, and load centers

Dual Element Current Limiting Advantage

The FRS-R series combines time delay and current limiting technologies to provide superior motor protection. The dual element design allows temporary overloads during motor starting while providing fast fault clearing for short circuits. Current limiting action reduces arc energy and protects electrical equipment from damage, while the 200 kAIC interrupt rating ensures safe fault clearing in high-current industrial applications.

Why Choose Bussmann Quality?

Bussmann delivers proven electrical protection with Class RK5 NEC compliance, dual element reliability, and current limiting safety for professional motor and circuit protection installations. Our commitment to electrical safety standards, consistent performance, and reliable overcurrent protection makes Bussmann the trusted choice for electrical contractors and facility managers requiring dependable circuit protection solutions.