FLNR450 - 450 Amp Fuse

FLNR450 - 450 Amp Fuse

When an electrical system must handle heavy startup loads, choosing the right fuse is about more than just matching the amperage. The FLNR450 is a 450A Class RK5 time-delay fuse built for circuits where temporary inrush current is part of normal operation. If your equipment calls for a 450-amp Class RK5 fuse with time-delay characteristics, the FLNR450 gives you the electrical ratings and operating characteristics needed for the job.

Key Features and Benefits

• 450-amp rating: Designed for circuits that specifically require a 450A fuse.
• Class RK5 design: Provides current-limiting overcurrent protection for compatible electrical systems.
• Time-delay operation: Handles brief startup and inrush currents without reacting like a fast-acting fuse.
• Dual-element construction: Well suited to equipment where overload protection and startup tolerance are both important.
• 250VAC / 125VDC ratings: Can be used in properly specified AC or DC applications within these voltage limits.
• Knife-blade style: Fits appropriately rated fuse blocks, clips, and holders.
  

Technical Specifications

• Catalog Number: FLNR450
  
• Series: FLNR
  
• Fuse Class: Class RK5
  
• Fuse Type: Dual-Element Time-Delay
  
• Continuous Current Rating: 450A
  
• Maximum AC Voltage: 250VAC
  
• Maximum DC Voltage: 125VDC
  
• Opening Type: Slo-Blo / Time Lag / Time Delay
  
• AC Interrupting Rating: Up to 300 kA
  
• DC Interrupting Rating: 20 kA
  
• Construction: Knife-Blade
  
• Indicating: No
  
• Mounting: Fuse Block / Clip / Holder
  
• Compatible Holder Series: LFR25600 Series
  

Material Compliance and Certifications

The FLNR series is UL Listed and CSA Certified, providing recognized third-party certification for appropriately specified electrical applications.

Where It Works Best

The FLNR450 450A fuse makes the most sense in commercial and industrial circuits where equipment can pull considerably more current for a short period during startup. Think motor circuits, transformers, industrial machinery, manufacturing equipment, and power distribution systems that specifically call for Class RK5 time-delay protection.

That's where the time-delay characteristic earns its keep. A normal motor startup, for example, can produce a brief current surge that shouldn't necessarily be treated as a fault. The FLNR450 is designed to ride through appropriate temporary inrush conditions while still providing protection when excessive current persists.