Bussmann Time Delay Fuse FRS-R Series 175A 600VAC/300VDC Class RK5 Dual Element Blade End

Bussmann Time Delay Fuse FRS-R Series 175A 600VAC/300VDC Class RK5 Dual Element Blade End

Professional-Grade Motor and Transformer Circuit Protection

The Bussmann Time Delay Fuse FRS-R Series delivers superior electrical protection and circuit safety for motor circuits, transformers, and inductive loads. 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 Time Delay Protection

• Dual Element Design - Provides time delay for motor starting currents while offering fast response to short circuits
• 175A Current Rating - Handles high amperage loads with reliable overcurrent protection
• 10 Second Time Delay at 500% - Allows motor starting surges while protecting against sustained overloads
• Current Limiting Technology - Reduces let-through energy and protects downstream equipment from fault damage

Safety & Standards Compliance

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

Technical Specifications

175A amperage rating, 600VAC/300VDC voltage rating, 200 kAIC interrupt rating at 600VAC, 0.81" x 0.81" x 5" dimensions, Class RK5 fuse classification, blade end x blade end connection, 10 second response time at 500% rated current, dual element construction, non-indicating design, 0.15 lb weight.

Installation & Setup

1. Turn off power and verify zero energy state using proper lockout/tagout procedures
2. Remove existing fuse using appropriate fuse pullers and safety equipment
3. Inspect fuse holder contacts for corrosion, damage, or loose connections
4. Insert new Bussmann FRS-R fuse ensuring proper blade end alignment and full insertion
5. Verify secure connection and proper fuse holder engagement
6. Restore power and test circuit operation following NEC guidelines

Professional Applications

Ideal for:

• Motor Protection Circuits - HVAC motors, pump motors, compressor motors, and industrial machinery drives
• Transformer Primary Protection - Distribution transformers, control transformers, and power supply transformers
• Industrial Control Panels - Motor control centers, variable frequency drives, and automation equipment
• Commercial Electrical Systems - Building electrical panels, HVAC systems, and facility power distribution
• Inductive Load Protection - Lighting ballasts, solenoids, contactors, and electromagnetic devices
• Power Distribution Equipment - Switchgear, panelboards, and electrical distribution systems
• Heavy Duty Applications - Manufacturing equipment, processing machinery, and industrial installations
• Electrical Panel Protection - Main panels, sub-panels, and branch circuit protection

Dual Element Current Limiting Advantage

Bussmann dual element technology combines time delay overload protection with fast-acting short circuit protection, providing superior motor circuit protection. The current limiting design reduces arc energy and fault damage while maintaining selective coordination with upstream and downstream protective devices, ensuring reliable electrical system operation.

Why Choose Bussmann Quality?

Bussmann commitment to electrical safety includes rigorous testing, NEC compliance, and reliable overcurrent protection for professional installations. Our Class RK5 time delay fuses provide the motor protection and fault clearing capability that electrical contractors trust for safe, code-compliant electrical systems.