KLSR400 - 400Amp Fuse

KLSR400 - 400Amp Fuse

When your equipment specifications call for a 400A Class RK1 fast-acting fuse, the KLSR400 offers clearly defined ratings to match. This current-limiting fuse uses a single-element silver-link design and is intended to provide fast-acting overload and short-circuit protection. For replacement work, don't stop at the 400A marking—confirm fuse class, opening characteristic, AC or DC voltage, interrupting capacity, physical construction, and mounting compatibility against the equipment requirements.

Key Features and Benefits

• 400A continuous current rating for equipment specifically requiring a 400-amp fuse.
• Class RK1 design provides an essential specification to verify when replacing an existing fuse.
• Fast-acting (F) opening characteristic provides fast overload and short-circuit protection.
• Uses a single-element silver link, the design the manufacturer identifies for the KLSR Series.
• Current-limiting performance helps reduce equipment damage caused by the heating and magnetic effects of short-circuit currents.
• Rated for systems requiring up to 600VAC.
• Supports properly specified DC applications up to 300VDC.
• Knife-blade construction provides the specified physical format for the KLSR400.
• Installs using a compatible fuse block, clip, or holder.
• The non-indicating design means it has no integral blown-fuse indicator.

Technical Specifications

• Catalog Number: KLSR400
  
• Manufacturer Description: FUS 600V F/A CLASS RK1 400A
  
• Series: KLSR
  
• Product Type: Fast-Acting, Current-Limiting Fuse
  
• Continuous Current Rating: 400A
  
• 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 manufacturer specifically identifies a single-element silver-link design for the KLSR Series. The supplied information does not provide a complete material breakdown for the KLSR400, so do not infer body, terminal, filler, or other component materials from another fuse family or catalog number.

Where It Works Best

The KLSR400 suits electrical equipment that specifically requires a 400A, fast-acting, current-limiting Class RK1 fuse with the corresponding voltage, interrupting, and physical requirements. The manufacturer identifies variable speed drives, rectifiers, and other equipment containing surge-sensitive components as examples where fast-acting KLSR protection can be useful. Its current-limiting design is intended to reduce equipment damage associated with the heating and magnetic effects of short-circuit currents.