KLSR350 - 350Amp Fuse

KLSR350 - 350Amp Fuse

A 350-amp rating may be the first thing you notice on the KLSR350, but getting the right fuse means checking more than amperage. This 350A Class RK1 fast-acting fuse combines a single-element silver-link design with current-limiting performance for fast overload and short-circuit protection. For replacement work, confirm the Class RK1 requirement, voltage ratings, interrupting capacity, fast-acting characteristic, physical configuration, and mounting requirements—not simply the 350A rating.

Key Features and Benefits

• 350A continuous current rating for equipment specifically requiring a 350-amp fuse.
• Class RK1 fuse configuration provides an important matching point for replacement and equipment specifications.
• Fast-acting (F) opening characteristic provides fast overload and short-circuit protection.
• A single-element silver-link design provides the KLSR Series' fast-acting performance.
• Current-limiting construction helps reduce equipment damage caused by the heating and magnetic effects of short-circuit currents.
• Rated for electrical systems requiring up to 600VAC.
• Also rated for properly specified applications up to 300VDC.
• Knife-blade construction provides the physical configuration specified for the KLSR350.
• Designed for installation using a compatible fuse block, clip, or holder.
• The non-indicating design means the fuse does not include an integral blown-fuse indicator.

Technical Specifications

• Catalog Number: KLSR350
  
• Manufacturer Description: FUS 600V F/A CLASS RK1 350A
  
• Series: KLSR
  
• Product Type: Fast-Acting, Current-Limiting Fuse
  
• Continuous Current Rating: 350A
  
• 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. The supplied specifications do not provide a complete, product-specific material composition for the KLSR350—including body, terminal, filler, and other component materials—so those details should not be assumed from another fuse or product family.

Where It Works Best

The KLSR350 350A Class RK1 fuse best matches equipment designed for a fast-acting, current-limiting Class RK1 fuse with corresponding electrical and physical requirements. Manufacturer guidance identifies 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.