KLNR004 - 4Amp Fuse

KLNR004 - 4Amp Fuse

The KLNR004 is a 4A Class RK1 fast-acting, current-limiting fuse for your electrical equipment that requires quick overload and short-circuit protection. Part of the KLNR Series, this industrial cartridge fuse uses a single-element, silver-link design and is rated for operation up to 250VAC or 125VDC. The current-limiting design also helps reduce equipment damage caused by the heating and magnetic effects of short-circuit currents. One important distinction when matching this fuse: KLNR004 is fast-acting rather than time-delay. Inductive loads such as motors, transformers, and solenoids can produce normal inrush currents that may cause a fast-acting fuse to open unless the fuse is appropriately sized for the application.

Key Features and Benefits

• 4A continuous current rating for equipment designed around this specific fuse rating and configuration.
• Fast-acting (F) operation provides quick overload and short-circuit protection.
• Class RK1 construction gives you a clear fuse-class requirement to verify when selecting a replacement.
• The current-limiting design helps reduce damage caused by the heating and magnetic effects associated with short-circuit currents.
• The industrial cartridge format is designed for compatible Class RK1 mounting arrangements.
• The non-indicating design has no built-in visual fuse-status indicator.
• Mounting is specified for a compatible fuse block, clip, or holder.

Technical Specifications

• Catalog Number: KLNR004
  
• Manufacturer Description: FUS 250V F/A CLASS RK1 4A
  
• Series: KLNR
  
• Product Type: Fast-Acting Current-Limiting Fuse
  
• Continuous Current Rating: 4A
  
• 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
  
• Construction / Size: Industrial Cartridge
  
• Indicating: No
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Specified Holder Series: LFR25030 Series
  

Material Compliance and Certifications

The supplied manufacturer information confirms the KLNR004's Class RK1 classification, fast-acting opening characteristic, current-limiting family style, electrical ratings, industrial cartridge construction, and mounting details. The manufacturer also discusses the KLNR/KLSR family and the current-limiting capability of UL Class RK1 fuses.

Where It Works Best

The KLNR004 4A fuse suits electrical equipment designed for a 4A Class RK1 fast-acting, current-limiting fuse with matching voltage, interrupting, physical, and mounting requirements. The manufacturer's guidance specifically calls out variable speed drives, rectifiers, and other equipment containing surge-sensitive components as applications where the fast-acting characteristics of the KLNR/KLSR Series can be useful.