Bussmann Time Delay Fuse FRS-R Series 45A 600VAC/250VDC Class RK5 Dual Element Ferrule End

Bussmann Time Delay Fuse FRS-R Series 45A 600VAC/250VDC Class RK5 Dual Element Ferrule End

Professional-Grade Dual Element Time Delay Electrical 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 construction with 10-second response time at 500% rated current, 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

Time Delay Protection

• Dual Element Construction - Provides time delay characteristics for motor starting currents while offering fast response to short circuits
• 10 Second Response Time at 500% - Allows temporary overloads while protecting against sustained overcurrent conditions
• 45 Ampere Rating - Handles continuous current up to 45A with reliable overcurrent protection
• Class RK5 Current Limiting - Reduces let-through energy and limits fault current to protect downstream equipment

Safety & Standards Compliance

• High Interrupt Rating - 200 kAIC at 600VAC and 20 kAIC at 250VDC for superior fault clearing capability
• CE Marked Compliance - Meets international electrical safety standards for global installations
• Non-Indicating Design - Professional ferrule end construction for secure panel mounting and reliable electrical connections

Technical Specifications

Amperage Rating: 45A continuous, Voltage Rating: 600VAC/250VDC, Interrupt Rating: 200 kAIC at 600VAC and 20 kAIC at 250VDC, Fuse Class: RK5 current limiting, Response Time: 10 seconds at 500% rated current, Element Type: Dual element time delay, Connection: Ferrule end x ferrule end, Dimensions: 13.38" L x 2.88" W x 2.88" H, Weight: 3.6 lbs, Construction: Non-indicating design with professional ferrule terminals

Installation & Setup

1. Verify power is completely disconnected and use proper lockout/tagout procedures before installation
2. Confirm fuse holder and electrical panel ratings match the 45A current and 600VAC/250VDC voltage specifications
3. Install fuse with ferrule ends properly seated in fuse clips, ensuring secure mechanical and electrical connection
4. Verify proper fuse orientation and that dual element time delay characteristics match motor or inductive load requirements
5. Test installation with appropriate electrical testing equipment before energizing the circuit
6. Document installation details including fuse specifications and installation date for maintenance records

Professional Applications

Ideal for:

• Motor Protection Circuits - Time delay characteristics accommodate motor starting currents while protecting against overload conditions
• Transformer Primary Protection - Dual element design handles inrush currents while providing reliable overcurrent protection
• Industrial Control Panels - Class RK5 current limiting reduces arc flash hazards and protects control equipment
• Commercial Lighting Circuits - Handles ballast inrush currents in fluorescent and HID lighting systems
• HVAC Equipment Protection - Protects compressors, fans, and other inductive loads with appropriate time delay characteristics
• Power Distribution Systems - Provides selective coordination in electrical distribution panels and switchgear
• Industrial Machinery Circuits - Protects motors, drives, and control circuits in manufacturing and processing equipment
• Electrical Panel Applications - Ferrule end design ensures secure mounting in fuse blocks and electrical enclosures

Dual Element Time Delay Advantage

The Bussmann FRS-R Series dual element construction provides superior protection by combining time delay response for temporary overloads with fast acting protection for short circuits. The 10-second response time at 500% rated current allows motor starting and transformer energizing while the current limiting Class RK5 design reduces let-through energy and arc flash hazards, making it ideal for protecting inductive loads and providing selective coordination in electrical distribution systems.

Why Choose Bussmann Quality?

Bussmann demonstrates unwavering commitment to electrical safety through CE marked compliance, professional-grade dual element construction, and reliable time delay overcurrent protection. The FRS-R Series delivers the current limiting technology, fault clearing capability, and selective coordination that electrical contractors and facility managers trust for critical motor protection, transformer circuits, and industrial electrical installations requiring superior circuit protection and electrical system reliability.