Bussmann Time Delay Fuse FRS-R Series 50A 600VAC/250VDC Class RK5 Dual Element Ferrule End

Bussmann Time Delay Fuse FRS-R Series 50A 600VAC/250VDC Class RK5 Dual Element Ferrule End

Professional-Grade Dual Element Time Delay Protection

The Bussmann Time Delay Fuse FRS-R Series delivers superior electrical protection and circuit safety for motor circuits and inductive loads. This Class RK5 time delay fuse features dual element construction with 10-second time delay 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

Dual Element Time Delay Protection

• 50A Current Rating - Handles continuous loads up to 50 amperes with reliable overcurrent protection
• 10 Second Time Delay at 500% - Allows motor starting currents while protecting against sustained overloads
• Dual Element Construction - Combines overload and short circuit protection in single fuse element
• Class RK5 Current Limiting - Reduces available fault current to protect downstream equipment

Safety & Standards Compliance

• High Interrupt Rating - 200 kAIC at 600VAC and 20 kAIC at 250VDC for reliable fault clearing
• CE Marked Compliance - Meets international electrical safety standards for global installations
• Non-Indicating Design - Professional grade construction for industrial panel applications

Technical Specifications

50 ampere current rating, 600VAC/250VDC voltage rating, Class RK5 current limiting, 200 kAIC interrupt rating at 600VAC, 20 kAIC at 250VDC, dual element time delay construction, ferrule end connections, 10 second response time at 500% rated current, dimensions 2.88" H x 2.88" W x 13.38" L, weight 3.6 lbs, non-indicating design for professional installations.

Installation & Setup

1. Verify power is completely disconnected and use proper lockout/tagout procedures before installation
2. Confirm fuse holder is rated for 50A current and 600VAC/250VDC voltage requirements
3. Insert ferrule ends fully into fuse clips ensuring secure mechanical and electrical connection
4. Verify proper fuse orientation and that connections are tight to prevent arcing
5. Test installation with appropriate electrical testing equipment before energizing circuit
6. Document installation per NEC requirements and facility electrical safety procedures

Professional Applications

Ideal for:

• Motor Protection Circuits - HVAC motors, pump motors, conveyor systems, and industrial machinery
• Transformer Primary Protection - Distribution transformers, control transformers, and power supplies
• Industrial Control Panels - Motor control centers, variable frequency drives, and automation systems
• Commercial Lighting Circuits - High-intensity discharge lighting, LED drivers, and ballast protection
• Power Distribution Systems - Electrical panels, switchgear, and load centers up to 50 amperes
• HVAC Equipment Protection - Air handlers, chillers, boilers, and building automation systems
• Manufacturing Equipment - Production machinery, material handling, and process control systems
• Electrical Panel Applications - Main panels, sub-panels, and distribution boards requiring time delay protection

Dual Element Time Delay Advantage

Bussmann dual element technology provides superior motor protection by allowing harmless starting currents while quickly clearing dangerous fault conditions. The time delay element handles temporary overloads while the current limiting element provides fast fault clearing, ensuring optimal protection coordination and reducing nuisance tripping in motor applications.

Why Choose Bussmann Quality?

Bussmann commitment to electrical safety includes rigorous testing, CE marking compliance, and reliable overcurrent protection for professional installations. Our Class RK5 current limiting technology and dual element construction ensure optimal circuit protection, motor starting capability, and electrical system reliability that electrical contractors and facility managers trust for critical applications.