FLNR125 - 125 Amp Fuse

FLNR125 - 125 Amp Fuse

When your circuit has to handle normal startup surges without sacrificing dependable overcurrent protection, the FLNR125 is built for the job. This 125A Class RK5 dual-element fuse features a Slo-Blo/time-delay response, allowing it to ride through temporary inrush currents that can occur when motors and other electrical equipment start up. The FLNR125 is rated for 250VAC and 125VDC and uses a traditional knife-blade design for installation in compatible fuse blocks, clips, and holders.

Key Features and Benefits

• 125-amp rating for circuits and equipment designed around 125A fuse protection.
• Class RK5, dual-element construction combines overcurrent protection with time-delay operation.
• The Slo-Blo/time-delay characteristic helps prevent unnecessary fuse opening during normal, short-lived startup currents.
• Rated for use at up to 250VAC or 125VDC.
• Knife-blade design fits the appropriate fuse blocks, clips, and holders.
• Suitable for use with the LFR25200 Series holder.
• Non-indicating design keeps the construction straightforward for applications where visual fuse indication isn't needed.
  

Technical Specifications

• Catalog Number: FLNR125
  
• Series: FLNR
  
• Current Rating: 125A
  
• Fuse Class: Class RK5
  
• Family Style: Dual Element Fuse
  
• 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 / Construction: Knife-Blade
  
• Indicating: No
  
• Mounting: Fuse Block / Clip / Holder
  
• Compatible Holder: LFR25200 Series
  

Material Compliance and Certifications

The FLNR125 is identified as a Class RK5 fuse. The product information provided for this catalog number does not specify individual RoHS, REACH, lead-free, or similar material-compliance declarations. If one of those certifications is required for your facility, project, or application, verify the applicable documentation for the exact FLNR125 before installation.

Where It Works Best

The FLNR125 makes the most sense in applications where a temporary current surge is part of normal operation. Motor circuits are a good example. Motors can pull considerably more current at startup than they do once they're running, so an appropriately selected time-delay fuse can tolerate that brief inrush while still protecting against sustained overcurrent conditions.

That same characteristic can make the FLNR125 a useful fit for transformers, industrial machinery, motor applications, control equipment, and commercial or industrial electrical distribution systems designed for Class RK5 protection.