FLNR250-ID - 250Amp Fuse

FLNR250-ID - 250Amp Fuse

The FLNR250-ID is a 250A Class RK5 time-delay fuse designed for commercial and industrial electrical applications where dependable overcurrent protection is critical. Rated for 250VAC and 125VDC, this dual-element fuse is designed to handle normal, short-duration inrush currents without opening unnecessarily, while still responding to sustained overcurrent conditions. That makes it particularly useful in systems with motors, transformers, machinery, and other equipment that can draw extra current during startup. If your equipment calls for a 250-amp Class RK5 indicating fuse with time-delay characteristics, the FLNR250-ID provides a practical combination of circuit protection, high interrupting capability, and easier maintenance.

Key Features and Benefits

• 250A continuous current rating for compatible commercial and industrial electrical systems.
• Class RK5, dual-element design combines overcurrent protection with time-delay operation.
• Time-delay performance allows appropriate temporary startup and inrush currents to pass without needless fuse operation.
• The built-in indication makes it easier to spot a blown fuse during inspection or troubleshooting.
• Rated for applications up to 250VAC or 125VDC.
• Knife-blade construction fits compatible fuse blocks, clips, and holders.
  

Technical Specifications

• Catalog Number: FLNR250-ID / FLNR250ID
  
• Series: FLNR_ID
  
• Fuse Class: Class RK5
  
• Current Rating: 250A
  
• Maximum AC Voltage: 250VAC
  
• Maximum DC Voltage: 125VDC
  
• Fuse Type: Dual Element
  
• Opening Characteristic: Slo-Blo / Time Lag / Time Delay
  
• Indicating: Yes
  
• AC Interrupting Rating: Up to 300 kA
  
• DC Interrupting Rating: 20 kA
  
• Construction: Knife-Blade
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Holder Family: LFR25400 Series
  

Material Compliance and Certifications

The FLNR250-ID is a Class RK5 fuse. For installations that must meet specific certification, regulatory, or material-compliance requirements, the applicable documentation should be checked against the requirements of the equipment and installation.

When replacing an existing fuse, it's important to look beyond amperage alone. Check the required fuse class, voltage rating, interrupting rating, time-delay characteristics, physical configuration, and indicating requirements before installation.

Where It Works Best

The FLNR250-ID is a good fit for industrial and commercial circuits that require 250A Class RK5 time-delay protection. Its dual-element design is especially useful around equipment that can experience a temporary current surge during startup, including properly specified motors, transformers, machinery, and similar electrical loads.