KLSR090 - 90Amp Fuse

KLSR090 - 90Amp Fuse

A 90-amp rating is only the first thing to check when you're replacing a fuse. The KLSR090 is a 90A Class RK1 fast-acting, current-limiting fuse built around a single-element silver-link design and rated for up to 600VAC or 300VDC. However, don't choose a fuse based on amperage alone: confirm the Class RK1 requirement, fast-acting characteristic, AC or DC voltage, interrupting capacity, physical configuration, and equipment specifications before installation.

Key Features and Benefits

• 90A continuous current rating for equipment specifically designed around a 90-amp fuse requirement.
• Class RK1 fuse configuration provides a defined fuse class for accurate replacement matching.
• Fast-acting (F) operation provides rapid overload and short-circuit protection.
• The single-element silver-link design is a defining construction characteristic of the KLSR Series.
• Current-limiting construction helps reduce equipment damage caused by the heating and magnetic effects of short-circuit currents.
• Supports applications requiring a fuse rated up to 600VAC.
• A 300VDC maximum rating also allows use in compatible DC equipment when all applicable requirements are satisfied.
• Knife-blade construction provides the KLSR090's specified physical connection format.
• The fuse is non-indicating, so it does not incorporate a blown-fuse indicator.
• Installs using a compatible fuse block, clip, or holder.

Technical Specifications

• Catalog Number: KLSR090
  
• Manufacturer Description: FUS 600V F/A CLASS RK1 90A
  
• Series: KLSR
  
• Product Type: Fast-Acting, Current-Limiting Fuse
  
• Continuous Current Rating: 90A
  
• 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: LFR60100 Series
  

Material Compliance and Certifications

The manufacturer specifically describes the KLSR Series as using a single-element silver-link design, so silver is identified for the fuse link. However, the supplied information does not provide a complete, product-specific material breakdown for the KLSR090, and it does not include environmental compliance declarations for this exact catalog number.

Where It Works Best

The KLSR090 90A fuse is a strong match for electrical equipment specifically designed to use a 90A Class RK1 fast-acting, current-limiting fuse with the corresponding electrical and physical requirements. The manufacturer specifically identifies variable speed drives, rectifiers, and other equipment containing surge-sensitive components as applications where the KLSR Series' fast-acting protection can be useful. Its current-limiting design is also intended to reduce equipment damage associated with the heating and magnetic effects of short-circuit currents.