Bussmann Time Delay Fuse FNQ-R Series 20A 600VAC/300VDC Class CC Current Limiting Ferrule End

Bussmann Time Delay Fuse FNQ-R Series 20A 600VAC/300VDC Class CC Current Limiting Ferrule End

Professional-Grade Current Limiting Circuit Protection

The Bussmann FNQ-R Series Time Delay Fuse delivers superior electrical protection and circuit safety for industrial control and branch circuit applications. This Class CC current-limiting fuse features rejection-style design with 12-second time delay at 200% rating, engineered for electrical contractors, industrial facilities, and commercial installations, providing the reliable overcurrent protection and industry-leading safety that electrical professionals demand.

Professional Features & Benefits

Current Limiting Protection

• 200 kAIC Interrupt Rating at 600VAC - Superior fault current clearing capability for high-energy electrical systems
• Current Limiting Technology - Reduces let-through energy and minimizes arc flash hazards during fault conditions
• Class CC Rejection Design - Prevents installation of incorrect fuse types ensuring proper circuit protection
• Dual Voltage Rating - 600VAC/300VDC capability provides versatility for AC and DC applications

Time Delay Characteristics

• 12 Second Time Delay at 200% - Allows temporary overloads while protecting against sustained overcurrent conditions
• Motor Starting Protection - Accommodates inrush currents without nuisance tripping during equipment startup
• Selective Coordination - Works with upstream protective devices for proper fault isolation

Safety & Standards Compliance

• CE Marked Certification - Meets European safety standards for international electrical installations
• Melamine Tube Construction - High-temperature resistant housing ensures reliable operation under extreme conditions
• Non-Indicating Design - Professional-grade construction for industrial control panel applications

Technical Specifications

20 ampere current rating, 600VAC/300VDC voltage rating, 200 kAIC interrupt rating at 600VAC, Class CC fuse classification, ferrule end connections, 12-second time delay at 200% rating, melamine tube construction, 1.5" height x 0.41" width x 0.41" depth dimensions, 0.15 lb weight, rejection-style design for proper fuse selection.

Installation & Setup

1. Verify power is OFF and use proper lockout/tagout procedures before fuse installation
2. Confirm fuse holder is rated for Class CC fuses and 600VAC operation
3. Check that 20A rating matches circuit protection requirements and conductor ampacity
4. Insert fuse with ferrule ends fully seated in fuse holder contacts
5. Verify secure mechanical connection and proper fuse holder closure
6. Test circuit operation and confirm proper overcurrent protection functionality

Professional Applications

Ideal for:

• Industrial Control Circuits - Motor starters, contactors, and control transformer protection
• Branch Circuit Protection - Lighting circuits, receptacle circuits, and small appliance protection
• Small Control Transformers - Primary and secondary protection for control power systems
• Motor Protection Circuits - Fractional horsepower motor protection with time delay characteristics
• Control Panel Applications - Industrial machinery control circuits and automation systems
• Commercial Buildings - HVAC controls, lighting controls, and building automation systems
• Power Distribution Panels - Subfeed protection and branch circuit overcurrent protection
• Line Protection Systems - Feeder circuits and distribution equipment protection

Current Limiting Technology Advantage

Bussmann's current limiting technology significantly reduces the let-through energy during fault conditions, minimizing arc flash hazards and reducing stress on electrical equipment. The Class CC rejection design ensures only properly rated fuses can be installed, preventing dangerous misapplication while the 200 kAIC interrupt rating provides superior fault clearing capability for modern electrical systems.

Why Choose Bussmann Quality?

Bussmann's commitment to electrical safety excellence is demonstrated through rigorous testing, CE marking compliance, and innovative current limiting technology. Each FNQ-R series fuse provides reliable overcurrent protection with time delay characteristics specifically engineered for industrial control applications, ensuring NEC compliance and professional-grade electrical safety for critical installations.