KLNR050 - 50Amp Fuse

KLNR050 - 50Amp Fuse

A 50A marking may be the first thing you check on a replacement fuse, but the KLNR050 has several other specifications that must match the equipment. The KLNR050 is a 50-amp Class RK1 fast-acting current-limiting fuse with an industrial cartridge design, rated for a maximum of 250VAC and 125VDC. For replacement work, don't rely on amperage alone—confirm Class RK1, voltage, interrupting capacity, fast-acting characteristics, physical configuration, and mounting compatibility against the equipment specifications.

Key Features and Benefits

• 50A continuous current rating for equipment specifically designed to use a 50-amp fuse.
• The Class RK1 fuse configuration helps narrow down the correct replacement beyond matching amperage and voltage.
• Fast-acting (F) operation responds quickly to overload and short-circuit conditions.
• The current-limiting design reduces equipment damage caused by the heating and magnetic effects of short-circuit currents.
• KLNR/KLSR fuses use a single-element silver link as part of their fast-acting design.
• Manufacturer-identified application examples include variable speed drives, rectifiers, and other equipment containing surge-sensitive components.
• Industrial cartridge construction is intended for installation in a compatible fuse block, clip, or holder.
• The non-indicating configuration means this model does not provide built-in blown-fuse indication.

Technical Specifications

• Catalog Number: KLNR050
  
• Manufacturer Description: FUS 250V F/A CLASS RK1 50A
  
• Series: KLNR
  
• Product Type: Fast-Acting Current-Limiting Fuse
  
• Continuous Current Rating: 50A
  
• 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 KLNR050 as a Class RK1 current-limiting fuse and states that the KLNR/KLSR family uses single-element silver-link construction. The manufacturer documentation also discusses this fuse family in connection with applications requiring the current-limiting ability of UL Class RK1 fuses.

Where It Works Best

The KLNR050 50A fuse best matches equipment that requires a 50A Class RK1 fast-acting, current-limiting fuse with the KLNR050's corresponding voltage, interrupting, physical, and mounting characteristics. 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 family can be useful.