Bussmann Time Delay Fuse FRS-R Series 350A 600VAC/300VDC Class RK5 Dual Element Blade End

Bussmann Time Delay Fuse FRS-R Series 350A 600VAC/300VDC Class RK5 Dual Element Blade End

Heavy-Duty Electrical Protection for High-Current Industrial Applications

The Bussmann Time Delay Fuse FRS-R Series 350A delivers superior electrical protection and circuit safety for high-current 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 for motor circuits and power distribution systems.

Professional Features & Benefits

Advanced Current Limiting Protection

• 350A Current Rating - Handles high-current loads with precise overcurrent protection and reliable circuit safety
• Dual Element Design - Provides time delay for motor starting currents while offering fast response to short circuits
• Current Limiting Technology - Reduces fault current magnitude and minimizes arc energy for enhanced electrical safety
• 10 Second Time Delay at 500% - Allows temporary overloads while protecting against sustained overcurrent conditions

Safety & Standards Compliance

• Class RK5 Classification - Meets NEC requirements for selective coordination and electrical system protection
• CE Marked Certification - Ensures compliance with international electrical safety standards and regulations
• 200 kAIC Interrupt Rating at 600V - Provides exceptional fault current clearing capability for industrial applications

Technical Specifications

350A amperage rating, 600VAC/300VDC voltage rating, 200 kAIC interrupt rating at 600V, 20 kAIC at 300VDC, Class RK5 fuse classification, blade end x blade end connection, dual element construction, 10 second response time at 500% rated current, dimensions 1.06" H x 1.06" W x 5.5" L, weight 3 lb, non-indicating design for standard electrical panel installations.

Installation & Setup

1. Verify power is completely disconnected and follow lockout/tagout procedures for electrical safety
2. Confirm fuse holder compatibility with blade end connection and 350A current rating
3. Check that electrical system voltage matches 600VAC/300VDC rating specifications
4. Install fuse with proper orientation ensuring secure blade end connection contact
5. Verify all connections are tight and properly seated for reliable electrical protection
6. Test system operation and confirm proper overcurrent protection functionality

Professional Applications

Ideal for:

• Motor Protection Circuits - Large industrial motors, conveyor systems, and heavy machinery requiring time delay protection
• Power Distribution Systems - Main electrical panels, distribution boards, and high-current feeder circuits
• Industrial Machinery - Manufacturing equipment, processing systems, and automated production lines
• Commercial Buildings - HVAC systems, elevator controls, and large lighting circuits requiring 350A protection
• Transformer Circuits - Primary and secondary protection for power transformers and distribution equipment
• Control Panels - Industrial control systems, motor control centers, and electrical switchgear
• Electrical Switchboards - Main distribution panels and electrical service equipment protection
• Power Generation - Generator protection circuits and electrical power system applications

Dual Element Current Limiting Advantage

Bussmann dual element technology provides superior electrical protection through time delay characteristics that accommodate motor starting currents while delivering fast-acting protection against short circuits. The current limiting design reduces arc energy and fault current magnitude, enhancing electrical safety and protecting downstream equipment from damage during fault conditions.

Why Choose Bussmann Quality?

Bussmann demonstrates unwavering commitment to CE marked certification, NEC compliance, and reliable overcurrent protection for professional electrical installations. Our Class RK5 time delay fuses deliver industry-leading electrical safety, selective coordination capability, and the trusted performance that electrical contractors and facility managers depend on for critical power distribution and motor protection applications.