Bussmann Time Delay Fuse FRS-R Series 150A 600VAC/300VDC Class RK5 Dual Element Blade End

Bussmann Time Delay Fuse FRS-R Series 150A 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 150A 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 600VAC - Superior fault current clearing capability for high-energy electrical systems
• Current Limiting Technology - Reduces let-through energy and minimizes damage to downstream equipment during fault conditions
• 10 Second Time Delay at 500% - Allows motor starting and temporary overloads while protecting against sustained overcurrent

Safety and Standards Compliance

• Class RK5 Classification - Meets NEC requirements for motor protection and general circuit applications
• CE Marked Certification - Ensures compliance with international electrical safety standards
• Non-Indicating Design - Professional appearance for panel installations with reliable operation indication

Technical Specifications

150 ampere rating, 600VAC/300VDC voltage rating, 200 kAIC interrupt rating at 600VAC, Class RK5 classification, blade end x blade end connection, dual element construction, 10 second time delay at 500% rated current, dimensions 5.0" L x 0.81" W x 0.81" H, weight 0.4 lb, non-indicating operation.

Installation & Setup

1. Verify power is OFF and use proper lockout/tagout procedures before installation
2. Confirm fuse holder is rated for 150A and Class RK5 fuses with blade end connections
3. Insert fuse into holder ensuring proper blade end contact alignment
4. Verify secure mechanical connection and proper fuse seating
5. Test installation with appropriate electrical testing equipment
6. Document installation per NEC requirements and facility maintenance records

Professional Applications

Ideal for:

• Motor Protection Circuits - Large motor starters, HVAC equipment, and industrial machinery protection
• Transformer Secondary Protection - Distribution transformers and power supply protection systems
• Industrial Control Panels - Manufacturing equipment and process control system protection
• Commercial Building Systems - Elevator controls, fire pumps, and emergency power systems
• Power Distribution Equipment - Switchgear, motor control centers, and electrical distribution panels
• Lighting Circuit Protection - High-intensity discharge lighting and large lighting panel protection
• Welding Equipment Protection - Industrial welding systems and high-current applications
• HVAC System Protection - Large air handling units, chillers, and building automation systems

Dual Element Current Limiting Advantage

Bussmann dual element technology provides superior selective coordination with upstream protective devices while offering fast fault clearing capability. The current limiting design reduces arc energy and equipment damage during short circuit conditions, while the time delay element accommodates motor starting currents and temporary overloads without nuisance tripping.

Why Choose Bussmann Quality?

Bussmann commitment to electrical safety includes rigorous testing for NEC compliance, reliable overcurrent protection performance, and professional-grade construction for critical electrical installations. Every fuse delivers consistent protection characteristics, superior fault clearing capability, and the electrical system reliability that contractors and facility managers trust for motor protection and industrial applications.