KLSR070 - 70Amp Fuse

KLSR070 - 70Amp Fuse

A 70-amp rating may be the first thing you notice on the KLSR070, but getting the replacement right means checking more than amperage. This 70A Class RK1 fast-acting, current-limiting fuse is rated for a maximum of 600VAC and 300VDC, with an interrupting capacity of 200,000A at 600VAC and 20,000A at 300VDC. For equipment containing surge-sensitive components—such as compatible variable speed drives and rectifiers—the KLSR070's fast response can be particularly useful. Inductive loads require more careful consideration, however, because motor, solenoid, and transformer inrush can affect the suitability of a fast-acting fuse.

Key Features and Benefits

• 70A continuous current rating for electrical equipment specifically requiring a 70-amp Class RK1 fuse.
• Fast-acting (F) opening characteristic provides rapid overload and short-circuit protection.
• The current-limiting design helps reduce damage from the heating and magnetic effects of short-circuit currents.
• Single-element silver-link design provides the fast-acting characteristics associated with the KLSR Series.
• 600VAC maximum voltage rating supports compatible AC electrical systems.
• Rated for up to 300VDC in applications meeting the fuse's other electrical requirements.
• Class RK1 construction gives maintenance teams a clearly defined fuse class to verify during replacement.
• Match the knife-blade configuration to the equipment's physical fuse connection requirements.
• The non-indicating design means it has no integral blown-fuse indicator.
• Installs using a compatible fuse block, clip, or holder.

Technical Specifications

• Catalog Number: KLSR070
  
• Manufacturer Description: FUS 600V F/A CLASS RK1 70A
  
• Series: KLSR
  
• Product Type: Fast-Acting, Current-Limiting Fuse
  
• Continuous Current Rating: 70A
  
• 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 supplied manufacturer information identifies the KLSR Series as using a single-element silver-link design, providing a specific material detail for the fuse element. The supplied specifications do not provide a complete, product-specific material composition for the KLSR070, including the remaining body and terminal materials. Product-specific environmental compliance declarations are also not included.

Where It Works Best

The KLSR070 70A fuse is well suited to electrical equipment specifically designed around a 70A Class RK1 fast-acting, current-limiting fuse with compatible voltage, interrupting, and knife-blade requirements. Manufacturer guidance specifically points to 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 also helps reduce the damaging heating and magnetic effects associated with short-circuit currents.