KLNR125 - 125Amp Fuse

KLNR125 - 125Amp Fuse

The KLNR125 is a 125A, 250V Class RK1 fast-acting current-limiting fuse designed for your electrical protection where you need a quick response to overloads and short circuits. Part of the KLNR series, it uses the manufacturer's single-element silver-link design to provide fast-acting protection while limiting damaging short-circuit current. The series carries a 200,000 A.I.R. rating, and the manufacturer specifically identifies variable speed drives, rectifiers, and other equipment with surge-sensitive components among its suitable applications. That combination makes KLNR125 a focused choice when the equipment calls for a 125-amp, 250V, fast-acting Class RK1 fuse. As with any replacement fuse, amperage is only one part of the match—confirm the fuse class, voltage rating, opening characteristic, physical dimensions, and equipment requirements before installation.

Key Features and Benefits

• 125A current rating for equipment specifically requiring a 125-amp fuse.
• 250V rating as identified in the manufacturer's description.
• Class RK1 fuse with current-limiting characteristics.
• Fast-acting design responds quickly to overload and short-circuit conditions.
• Uses a single-element silver link, the design specified for the KLNR/KLSR family.
• Current-limiting operation helps reduce equipment damage associated with the heating and magnetic effects of short-circuit currents.
• Manufacturer application guidance specifically includes variable speed drives and rectifiers.
• The KLNR series provides a clearly defined, fast-acting alternative for circuits where time-delay operation is not required.

Technical Specifications

• Catalog Number: KLNR125
  
• Manufacturer Description: FUS 250V F/A CLASS RK1 125A
  
• Series: KLNR
  
• Product Type: Fast-Acting Current-Limiting Fuse
  
• Continuous Current Rating: 125A
  
• Voltage: 250V
  
• Opening Characteristic: Fast-Acting (F)
  
• Fuse Class: Class RK1
  
• Family Design: Single-Element, Silver Link
  
• Series Interrupting Rating: 200,000 A.I.R.
  

Material Compliance and Certifications

The supplied information identifies KLNR125 as a Class RK1 current-limiting fuse and describes the KLNR/KLSR family as using a single-element silver-link design. The manufacturer's application discussion also references the current-limiting capability of UL Class RK1 fuses.

Where It Works Best

The KLNR125 best matches equipment designed around a 125A, 250V Class RK1 fast-acting current-limiting fuse. The manufacturer highlights variable speed drives, rectifiers, and other equipment containing surge-sensitive components as applications where the KLNR/KLSR series' fast-acting behavior can be useful. Its current-limiting design is intended to reduce equipment damage caused by the heating and magnetic effects associated with short-circuit currents.