KLNR250 - 250Amp Fuse

KLNR250 - 250Amp Fuse

When your equipment calls for a 250A Class RK1 fast-acting fuse, matching the amperage is only the beginning. The KLNR250 combines a 250A continuous current rating with fast-acting operation and a current-limiting, single-element silver-link design. The KLNR series' fast response makes it particularly relevant for equipment with surge-sensitive components, including variable speed drives and rectifiers. For replacement work, however, check the entire specification—not simply "250 amp." Fuse class, voltage, interrupting rating, fast-acting characteristic, physical format, and mounting compatibility all matter when determining whether KLNR250 is the right match for the equipment.

Key Features and Benefits

• 250A continuous current rating for equipment designed around a 250-amp Class RK1 fuse.
• Fast-acting (F) operation provides rapid overload and short-circuit protection.
• The Class RK1 fuse configuration gives you a specific fuse class to match equipment requirements.
• Built around the KLNR series' single-element silver-link design.
• Current-limiting design helps reduce equipment damage caused by the heating and magnetic effects of short-circuit currents.
• Handles applications rated up to 250VAC.
• Knife-blade construction provides the physical configuration specified for this 250A model.
• Non-indicating design—KLNR250 does not include an indication feature.
• Designed for installation using a compatible fuse block, clip, or holder.

Technical Specifications

• Catalog Number: KLNR250
  
• Manufacturer Description: FUS 250V F/A CLASS RK1 250A
  
• Series: KLNR
  
• Product Type: Fast-Acting Current-Limiting Fuse
  
• Continuous Current Rating: 250A
  
• Maximum AC Voltage: 250VAC
  
• Maximum DC Voltage: 125VDC
  
• AC Interrupting Rating: 200,000A at 250VAC
  
• DC Interrupting Rating: 20,000A at 125VDC
  
• Opening Characteristic: Fast-Acting (F)
  
• Fuse Class: Class RK1
  
• Family Style: Current Limiting
  
• Element Design: Single-element silver link
  
• Construction / Size: Knife-Blade
  
• Indicating: No
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Specified Holder Series: LFR25400 Series
  

Material Compliance and Certifications

The supplied manufacturer information confirms the KLNR250's Class RK1 designation, current-limiting family style, single-element silver-link design, fast-acting characteristic, electrical ratings, knife-blade construction, and mounting method. The manufacturer also discusses the KLNR/KLSR series for applications requiring the current-limiting capability of UL Class RK1 fuses.

Where It Works Best

The KLNR250 250A fuse fits electrical equipment specifically designed for a 250A Class RK1 fast-acting, current-limiting fuse with knife-blade construction. The manufacturer specifically identifies variable speed drives, rectifiers, and other equipment containing surge-sensitive components as examples where the fast-acting characteristics of the KLNR/KLSR series can be useful. For AC applications, confirm that the equipment requirements fall within the 250VAC maximum and 200,000A interrupting rating at 250VAC. For DC service, verify compatibility with the 125VDC maximum and 20,000A interrupting rating at 125VDC.