KLNR300 - 300Amp Fuse

KLNR300 - 300Amp Fuse

The KLNR300 is a 300A Class RK1 fast-acting, current-limiting fuse designed for your electrical equipment that specifically requires this combination of amperage, fuse class, voltage rating, and opening characteristic. Its single-element silver-link design provides fast-acting overload and short-circuit protection. At the same time, the current-limiting construction helps reduce equipment damage associated with the heating and magnetic effects of short-circuit currents. This non-indicating fuse uses a knife-blade configuration and mounts in a compatible fuse block, clip, or holder; the supplied specifications identify the LFR25400 Series holder. For a replacement, don't stop at the 300A rating—confirm Class RK1, fast-acting operation, voltage, interrupting capacity, physical configuration, and mounting requirements against the equipment specifications.

Key Features and Benefits

• 300A continuous current rating for equipment designed around a 300-amp Class RK1 fuse.
• Fast-acting (F) opening characteristic provides rapid overload and short-circuit protection.
• Uses a single-element silver-link design, a defining characteristic of the KLNR/KLSR series.
• The current-limiting construction helps reduce damage from the heating and magnetic effects of short-circuit currents.
• Rated for electrical systems up to 250VAC.
• Knife-blade construction provides the physical format specified for the KLNR300.
• The non-indicating design means this model does not include a fuse-status indication feature.
• Designed for installation in a compatible fuse block, clip, or holder.

Technical Specifications

• Catalog Number: KLNR300
  
• Manufacturer Description: FUS 250V F/A CLASS RK1 300A
  
• Series: KLNR
  
• Product Type: Fast-Acting Current-Limiting Fuse
  
• Continuous Current Rating: 300A
  
• 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: Knife-Blade
  
• Indicating: No
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Specified Holder Series: LFR25400 Series
  

Material Compliance and Certifications

The supplied manufacturer information identifies the KLNR300 as a Class RK1 fuse. It confirms its fast-acting operation, current-limiting family style, single-element silver-link design, knife-blade construction, and electrical ratings.

Where It Works Best

The KLNR300 300A fuse best matches electrical equipment designed for a 300A Class RK1 fast-acting, current-limiting fuse with knife-blade construction. The manufacturer's application guidance specifically points to variable speed drives, rectifiers, and other equipment containing surge-sensitive components as examples where the KLNR/KLSR series' fast-acting behavior can be useful. For AC service, verify the equipment requirements against the 250VAC maximum and 200,000A interrupting rating at 250VAC. For DC service, confirm compatibility with the 125VDC maximum and 20,000A interrupting rating at 125VDC.