KLSR040 - 40Amp Fuse

KLSR040 - 40Amp Fuse

A 40A rating may be the first thing you notice on the KLSR040, but choosing the right replacement means checking more than amperage. The KLSR040 is a 40A Class RK1 fast-acting, current-limiting fuse built around a single-element silver-link design. The KLSR040 uses an industrial cartridge format and does not include an indicating feature. If you're replacing an existing fuse, verify the 40A rating, Class RK1 designation, fast-acting characteristic, AC or DC voltage requirements, interrupting capacity, and physical fit rather than relying on amperage alone.

Key Features and Benefits

• 40A continuous current rating for equipment specifically requiring this amperage.
• Class RK1 fuse configuration provides a defined fuse class for accurate replacement matching.
• Fast-acting (F) operation provides quick overload and short-circuit protection.
• The current-limiting design helps reduce damage from the heating and magnetic effects of short-circuit currents.
• Rated for a maximum of 600VAC.
• Supports applications up to 300VDC, subject to the equipment's complete electrical requirements.
• Manufacturer-identified applications include variable speed drives and rectifiers.
• Industrial cartridge construction provides the specified physical fuse format.
• Non-indicating design suits installations where an integral fuse-status indicator is not required.

Technical Specifications

• Catalog Number: KLSR040
  
• Manufacturer Description: FUS 600V F/A CLASS RK1 40A
  
• Series: KLSR
  
• Product Type: Fast-Acting, Current-Limiting Fuse
  
• Continuous Current Rating: 40A
  
• Maximum AC Voltage: 600VAC
  
• Maximum DC Voltage: 300VDC
  
• AC Interrupting Capacity: 200,000A at 600VAC
  
• Listed Interrupting Rating: 20 kA at 300VDC
  
• 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
  

Material Compliance and Certifications

The manufacturer information identifies the KLSR Series as using a single-element silver-link design, so silver is specifically documented as part of the fuse-element construction. The supplied information does not include a complete, product-specific breakdown of the KLSR040's remaining materials.

Where It Works Best

The KLSR040 40A fuse suits electrical equipment designed for a 40A, Class RK1, fast-acting current-limiting fuse with compatible voltage, interrupting, and physical requirements. The manufacturer specifically points to variable speed drives, rectifiers, and other equipment containing surge-sensitive components as applications where the KLSR Series' fast-acting characteristics can be useful. Its current-limiting design is intended to reduce equipment damage associated with the heating and magnetic effects of short-circuit currents.