Bussmann Time Delay Fuse FRS-R Series 20A 600VAC/300VDC Class RK5 Dual Element Ferrule End

Bussmann Time Delay Fuse FRS-R Series 20A 600VAC/300VDC Class RK5 Dual Element Ferrule End

Professional-Grade Dual Element Time Delay Protection

The Bussmann FRS-R Series Time Delay Fuse delivers superior electrical protection and circuit safety for motor circuits and inductive loads. This Class RK5 dual element time delay fuse features advanced 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

Dual Element Time Delay Protection

• 20 Ampere Rating - Provides precise overcurrent protection for motor and lighting circuits with reliable performance
• 10 Second Time Delay at 500% - Allows motor starting currents while protecting against sustained overloads
• Dual Element Design - Combines overload and short circuit protection in single fuse for comprehensive circuit safety
• Current Limiting Technology - Reduces let-through energy and limits fault current for enhanced electrical system protection

Safety & Standards Compliance

• Class RK5 Classification - Meets NEC requirements for motor protection and selective coordination applications
• 200 kAIC Interrupt Rating at 600VAC - Safely clears high fault currents in industrial and commercial electrical systems
• CE Marked Compliance - Meets international electrical safety standards for global installations

Technical Specifications

20 ampere rating, 600VAC/300VDC voltage rating, 200 kAIC interrupt rating at 600VAC, Class RK5 fuse classification, ferrule end connections, dual element construction, 10 second time delay at 500% rated current, dimensions 1.61" x 1.61" x 9.63", weight 1.3 pounds, non-indicating design for standard electrical panel installations.

Installation & Setup

1. Turn off power and verify zero energy state using proper lockout/tagout procedures for electrical safety
2. Remove existing fuse using appropriate fuse pullers and inspect fuse holder for damage or corrosion
3. Insert new Bussmann FRS-R fuse ensuring proper ferrule end contact with fuse holder terminals
4. Verify secure mechanical connection and proper fuse seating in electrical panel or disconnect
5. Restore power and test circuit operation while monitoring for proper motor starting characteristics
6. Document installation with fuse specifications for maintenance records and NEC compliance verification

Professional Applications

Ideal for:

• Motor Protection Circuits - HVAC motors, pump motors, conveyor systems, and industrial machinery requiring time delay characteristics
• Lighting Circuit Protection - Commercial lighting panels, fluorescent ballast circuits, and LED driver protection applications
• Control Panel Applications - Motor control centers, variable frequency drives, and automation equipment protection
• Transformer Secondary Protection - Distribution transformers, control transformers, and power supply protection circuits
• Industrial Machinery - Manufacturing equipment, processing machinery, and production line electrical protection
• Commercial Building Systems - HVAC equipment, elevator motors, and building automation electrical circuits
• Power Distribution Panels - Electrical switchgear, motor control centers, and distribution board applications
• Electrical Panel Protection - Main panels, sub-panels, and electrical distribution equipment requiring Class RK5 protection

Current Limiting Technology Advantage

Bussmann current limiting technology reduces peak let-through current and energy during fault conditions, protecting downstream electrical equipment from damage. The dual element design provides superior selective coordination with upstream protective devices while allowing normal motor starting currents, ensuring reliable electrical system operation and enhanced safety for professional installations.

Why Choose Bussmann Quality?

Bussmann commitment to electrical safety includes rigorous testing for NEC compliance, reliable overcurrent protection performance, and professional-grade construction for industrial and commercial electrical installations. Each FRS-R series fuse delivers consistent time delay characteristics, current limiting protection, and long-term reliability that electrical contractors and facility managers trust for critical circuit protection applications.