FLNR300 - 300 Amp Fuse

FLNR300 - 300 Amp Fuse

The FLNR300 is a 300A Class RK5 time-delay fuse designed for electrical applications where dependable overcurrent protection matters, but normal startup current shouldn't cause unnecessary fuse operation. Those characteristics make it a useful fit for many industrial and commercial applications, particularly equipment involving motors, transformers, machinery, and other loads that can draw additional current during startup. If you're replacing an existing fuse, check more than the amperage stamped on the fuse. Matching the Class RK5 designation, 300A rating, voltage, time-delay characteristics, interrupting capacity, and physical configuration is important for selecting the correct replacement.

Key Features and Benefits

• 300-amp rating: Designed for circuits requiring a 300A fuse.
• Class RK5: Provides the electrical and physical characteristics associated with the Class RK5 fuse category.
• Time-delay operation: Allows normal, short-duration inrush currents to pass without unnecessarily opening the circuit.
• Dual-element design: Combines time-delay behavior with overcurrent protection for demanding electrical applications.
• AC and DC capability: Rated up to 250VAC and 125VDC.
• Knife-blade style: Fits compatible fuse blocks, clips, and holders.
• Non-indicating construction: A straightforward fuse design without a blown-fuse indicator.
  

Technical Specifications

• Catalog Number: FLNR300
  
• Series: FLNR
  
• Fuse Type: Dual-Element Time-Delay Fuse
  
• Fuse Class: Class RK5
  
• Current Rating: 300A
  
• Maximum AC Voltage: 250VAC
  
• Maximum DC Voltage: 125VDC
  
• Opening Type: Slo-Blo / Time Lag (T) / Time Delay
  
• AC Interrupting Rating: Up to 300 kA
  
• DC Interrupting Rating: 20 kA
  
• Size / Style: Knife-Blade
  
• Indicating: No
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Specified Holder Family: LFR25400 Series
  

Material Compliance and Certifications

The FLNR300 is a Class RK5 fuse. Specific material compliance or certification details weren't included in the provided product information, so they shouldn't be assumed. For an installation where a particular approval, certification, or material compliance requirement applies, confirm that those requirements are met in the appropriate product documentation before installation.

Where It Works Best

The FLNR300 makes the most sense for industrial and commercial electrical applications that require 300A Class RK5 time-delay protection. Because temporary inrush current is common when certain electrical loads start, the time-delay characteristics of such current can be especially useful around motors, transformers, industrial machinery, and compatible electrical distribution equipment.