KLSR003 - 3Amp Fuse

KLSR003 - 3Amp Fuse

The KLSR003 is a 3A Class RK1 fast-acting, current-limiting fuse designed for electrical equipment that requires a quick response to overloads and short circuits. Rated for a maximum of 600VAC and 250VDC, it combines a single-element silver-link design with an AC interrupting rating of 200,000A at 600VAC and a DC interrupting rating of 20,000A at 250VDC. The manufacturer specifically cautions that motors, transformers, solenoids, and other inductive loads can produce harmless inrush currents that may cause KLSR fuses to open unless they are significantly oversized. When you're replacing a fuse, check the full specification—3A rating, Class RK1, voltage, interrupting capacity, fast-acting characteristic, cartridge construction, and mounting compatibility—rather than relying on amperage alone.

Key Features and Benefits

• 3A continuous current rating for equipment specifically designed to use a 3-amp Class RK1 fuse.
• Fast-acting (F) operation provides rapid response to overload and short-circuit conditions.
• The current-limiting design helps reduce equipment damage associated with the heating and magnetic effects of short-circuit current.
• Handles applications requiring up to a 600VAC maximum voltage rating.
• Also rated for up to 250VDC when equipment and circuit requirements are compatible.
• The KLSR series uses a single-element silver-link construction to deliver fast-acting characteristics.
• Industrial cartridge format supports installation in equipment designed for this fuse configuration.
• Installs using a compatible fuse block, clip, or holder.
• LFR60030 Series is the specified holder reference provided for the KLSR003.
• Match the non-indicating design when replacing an existing fuse.

Technical Specifications

• Catalog Number: KLSR003
  
• Manufacturer Description: FUS 600V F/A CLASS RK1 3A
  
• Series: KLSR
  
• Product Type: Fast-Acting, Current-Limiting Fuse
  
• Continuous Current Rating: 3A
  
• Maximum AC Voltage: 600VAC
  
• Maximum DC Voltage: 250VDC
  
• AC Interrupting Rating: 200,000A at 600VAC
  
• DC Interrupting Rating: 20,000A at 250VDC
  
• Opening Characteristic: Fast-Acting (F)
  
• Fuse Class: Class RK1
  
• Family Style: Current Limiting
  
• Construction / Size: Industrial Cartridge
  
• Element Design: Single-element silver link
  
• Indicating: No
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Specified Holder Series: LFR60030 Series
  

Material Compliance and Certifications

The supplied manufacturer information specifically describes the KLSR series as using a single-element silver link. The supplied specifications do not include a complete product-specific material breakdown for the KLSR003—including body, terminal, filler, and other construction materials—so do not assume additional materials.

Where It Works Best

The KLSR003 best matches electrical equipment that requires a 3A, Class RK1, fast-acting, current-limiting industrial cartridge fuse. Manufacturer guidance points to variable speed drives, rectifiers, and equipment containing surge-sensitive components as examples where the KLSR series' fast-acting characteristics can be useful.

For AC service, confirm that the equipment requirements fall within the 600VAC maximum rating and 200,000A interrupting rating at 600VAC. For DC service, verify compatibility with the 250VDC maximum and 20,000A interrupting rating at 250VDC. Installation must also match the industrial cartridge configuration and use the appropriate fuse block, clip, or holder; the supplied holder reference is the LFR60030 Series.