KLNR045 - 45Amp Fuse

KLNR045 - 45Amp Fuse

When you're replacing a 45A Class RK1 fuse, matching the amperage is only the beginning. The KLNR045 combines a 45-amp continuous current rating with fast-acting operation, current-limiting performance, and an industrial cartridge format. The manufacturer also identifies variable speed drives, rectifiers, and other equipment containing surge-sensitive components as applications where this fast response can be useful. Because fuse selection depends on more than current alone, confirm the fuse class, voltage, interrupting rating, opening characteristic, cartridge configuration, and mounting requirements before using the KLNR045 as a replacement.

Key Features and Benefits

• 45A continuous current rating for equipment designed around a 45-amp fuse.
• Class RK1 configuration provides a specific fuse class for accurate replacement matching.
• Fast-acting (F) operation delivers quick response to overload and short-circuit conditions.
• The current-limiting design helps reduce equipment damage from the heating and magnetic effects of short-circuit currents.
• Uses the KLNR/KLSR family's single-element silver-link construction.
• Rated for electrical systems up to 250VAC and 125VDC, subject to the equipment's requirements.
• Industrial cartridge construction is designed for installation with a compatible fuse block, clip, or holder.
• Non-indicating design suits installations where fuse indication is not required.

Technical Specifications

• Catalog Number: KLNR045
  
• Manufacturer Description: FUS 250V F/A CLASS RK1 45A
  
• Series: KLNR
  
• Product Type: Fast-Acting Current-Limiting Fuse
  
• Continuous Current Rating: 45A
  
• 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: Industrial Cartridge
  
• Indicating: No
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Specified PG Holder: LFR25060 Series
  

Material Compliance and Certifications

The supplied manufacturer information identifies the KLNR045 as a Class RK1 current-limiting fuse and specifies a single-element silver-link design for the KLNR/KLSR family. The manufacturer documentation also discusses the series in applications that require the current-limiting ability of UL Class RK1 fuses.

Where It Works Best

The KLNR045 45A fuse suits electrical equipment that requires a 45A, Class RK1, fast-acting, current-limiting fuse with the corresponding electrical and physical requirements. The manufacturer specifically points to variable speed drives, rectifiers, and other equipment containing surge-sensitive components as examples where the fast-acting characteristics of the KLNR/KLSR family can be useful.