FLNR125-ID - 125 Amp Fuse

FLNR125-ID - 125 Amp Fuse

When you need a 125-amp fuse that can handle normal startup current without sacrificing dependable overcurrent protection, the FLNR125-ID is designed for the job. This Class RK5 dual-element fuse has a time-delay, or Slo-Blo, operating characteristic, allowing it to accommodate brief current surges commonly associated with motors, transformers, and other electrical equipment during startup. It is rated for 250VAC and 125VDC and uses a familiar knife-blade configuration for installation in compatible fuse blocks, clips, and holders. One particularly useful feature is its built-in indication.

Key Features and Benefits

• 125-amp rating – Designed for electrical circuits requiring 125A Class RK5 fuse protection.
• Time-delay performance – Helps accommodate temporary startup and inrush currents without unnecessary fuse operation.
• Dual-element design – Provides the operating characteristics needed for applications where both overload protection and time delay are important.
• Built-in indication – Makes an open fuse easier to identify during troubleshooting and routine maintenance.
• 250VAC / 125VDC capability – Suitable for properly specified AC and DC applications within these voltage limits.
• Knife-blade construction – Fits compatible fuse blocks, clips, and holders.
  

Technical Specifications

• Catalog Number: FLNR125-ID
  
• Manufacturer Catalog Number: FLNR125ID
  
• Series: FLNR_ID
  
• Continuous Current Rating: 125A
  
• Fuse Class: Class RK5
  
• Fuse Type: Dual Element
  
• Maximum AC Voltage: 250VAC
  
• Maximum DC Voltage: 125VDC
  
• Opening Characteristic: Slo-Blo / Time Lag / Time Delay
  
• AC Interrupting Rating: Up to 300 kA
  
• DC Interrupting Rating: 20 kA
  
• Size / Construction: Knife-Blade
  
• Indicating: Yes
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Specified Holder: LFR25200 Series
  

Material Compliance and Certifications

The FLNR125-ID is identified as a Class RK5 fuse. Specific RoHS, REACH, lead-free, or other material-compliance declarations were not included in the product information provided for this catalog number. If your facility, project, or application has specific compliance requirements, confirm the appropriate documentation for the exact FLNR125-ID before use.

Where It Works Best

The FLNR125-ID makes the most sense in applications where short periods of higher current are a normal part of equipment operation. Motors are a good example: starting a motor can temporarily require considerably more current than running it. A properly selected time-delay fuse is designed to accommodate that brief inrush while still protecting sustained overcurrent conditions.

That makes this fuse a natural fit for appropriately designed motor circuits, transformers, industrial machinery, control equipment, and commercial or industrial electrical distribution systems requiring Class RK5 protection. The indicating feature is especially handy in equipment containing several fuses. When something goes down, being able to identify an open fuse more quickly can make troubleshooting a little less tedious.