KLSR300 - 300Amp Fuse

KLSR300 - 300Amp Fuse

When your equipment calls for a 300A Class RK1 fast-acting fuse, the KLSR300 delivers a specific set of electrical and physical characteristics. This KLSR Series fuse uses a single-element silver-link design for fast-acting overload and short-circuit protection and features knife-blade construction for installation in a compatible fuse block, clip, or holder. For replacement work, though, don't stop at the 300A rating—confirm the Class RK1 requirement, voltage, interrupting capacity, opening characteristic, knife-blade configuration, and mounting compatibility before matching.

Key Features and Benefits

• 300A continuous current rating for equipment specifically designed around a 300-amp fuse requirement.
• Class RK1 configuration provides a key specification to verify when matching an existing fuse or equipment requirement.
• Fast-acting (F) response provides fast overload and short-circuit protection.
• Uses a single-element silver-link design, a defining construction feature of the KLSR Series.
• The current-limiting design helps reduce equipment damage from the heating and magnetic effects associated with short-circuit currents.
• Rated for operation up to 600VAC.
• Supports properly specified DC applications up to 300VDC.
• Knife-blade construction provides the physical format specified for the KLSR300.
• Non-indicating design; an integral blown-fuse indicator is not specified.
• Installs using a compatible fuse block, clip, or holder.

Technical Specifications

• Catalog Number: KLSR300
  
• Manufacturer Description: FUS 600V F/A CLASS RK1 300A
  
• Series: KLSR
  
• Product Type: Fast-Acting, Current-Limiting Fuse
  
• Continuous Current Rating: 300A
  
• Maximum AC Voltage: 600VAC
  
• Maximum DC Voltage: 300VDC
  
• AC Interrupting Capacity: 200,000A at 600VAC
  
• DC Interrupting Capacity: 20,000A at 300VDC
  
• Listed Interrupting Rating: 20 kA at 300VDC
  
• Opening Characteristic: Fast-Acting (F)
  
• Fuse Class: Class RK1
  
• Family Style: Current Limiting
  
• Construction / Size: Knife-Blade
  
• Element Design: Single-element silver link
  
• Indicating: No
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Specified PG Holder: LFR60400 Series
  

Material Compliance and Certifications

The supplied manufacturer information identifies the KLSR Series as using a single-element silver-link design. It does not provide a complete, product-specific material breakdown for KLSR300, so do not assume materials for the fuse body, terminals, filler, and other components based on other products or fuse families.

Where It Works Best

The KLSR300 300A Class RK1 fuse is well suited to electrical equipment specifically designed for a fast-acting, current-limiting Class RK1 fuse with matching voltage, interrupting, and physical requirements. The manufacturer specifically identifies variable speed drives, rectifiers, and other equipment containing surge-sensitive components as examples where the fast-acting characteristics of the KLSR Series can be useful. Its current-limiting design also reduces damage from the heating and magnetic effects of short-circuit currents.