Bussmann Time Delay Fuse FRS-R Series 225A 600VAC/300VDC Class RK5 Dual Element Blade End

Bussmann Time Delay Fuse FRS-R Series 225A 600VAC/300VDC Class RK5 Dual Element Blade End

Professional-Grade Motor and Transformer Circuit Protection

The Bussmann FRS-R Series Time Delay Fuse delivers superior electrical protection and circuit safety for high-amperage motor and transformer 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 for 225A circuits.

Professional Features & Benefits

Advanced Time Delay Protection

• Dual Element Design - Provides superior time delay characteristics with 10 second response at 500% rated current for motor starting protection
• Current Limiting Technology - Reduces peak let-through current and energy to protect downstream equipment from fault damage
• Class RK5 Performance - Delivers reliable overcurrent protection with excellent selective coordination capabilities
• 225A Rating - Handles high-amperage applications up to 225 amperes with consistent performance

Safety & Standards Compliance

• CE Marked Certification - Meets European safety standards for international electrical installations
• Non-Indicating Design - Professional-grade construction without visual indication for standard electrical panel applications
• Blade End Connection - Secure blade-to-blade connection system ensures reliable electrical contact and easy installation

Technical Specifications

225 ampere rating, 600VAC/300VDC voltage rating, 20 kAIC interrupt rating at 300VDC and 200 kAIC at 600V, Class RK5 time delay classification, dual element construction, blade end x blade end connection, 10 second response time at 500% rated current, dimensions 0.81" H x 0.81" W x 5" L, weight 0.15 lb, non-indicating design for professional electrical installations.

Installation & Setup

1. Verify power is completely disconnected and follow lockout/tagout procedures before fuse installation
2. Confirm fuse holder is rated for 225A and Class RK5 fuses with proper blade end connections
3. Insert fuse ensuring proper blade end alignment and secure connection on both ends
4. Verify fuse is fully seated and making proper electrical contact before energizing circuit
5. Test circuit operation and verify proper overcurrent protection functionality
6. Document installation with fuse specifications for maintenance records and NEC compliance

Professional Applications

Ideal for:

• Motor Protection Circuits - Large motor starting applications requiring time delay for inrush current handling
• Transformer Primary Protection - High-amperage transformer circuits in industrial and commercial power distribution
• Industrial Control Panels - Heavy-duty control circuits and power distribution in manufacturing facilities
• Commercial Building Systems - HVAC equipment, elevator systems, and large electrical loads
• Power Distribution Equipment - Switchgear, motor control centers, and electrical distribution panels
• Lighting Circuit Protection - High-amperage lighting circuits and ballast protection systems
• Industrial Machinery - Production equipment, conveyor systems, and automated manufacturing lines
• Electrical Service Panels - Main distribution panels and sub-panel overcurrent protection

Dual Element Time Delay Advantage

The FRS-R Series dual element design provides superior selective coordination and motor protection by combining fast short-circuit response with time delay overload protection. This current limiting technology reduces arc energy and fault damage while allowing normal motor starting currents, making it ideal for industrial applications requiring both overcurrent protection and equipment longevity.

Why Choose Bussmann Quality?

Bussmann's commitment to CE marking compliance, reliable dual element construction, and proven current limiting technology ensures professional electrical installations meet safety standards while providing dependable overcurrent protection. The FRS-R Series delivers the electrical safety, selective coordination, and fault clearing capability that electrical contractors and facility managers trust for critical 225A circuit protection applications.