FLSR125 - 125Amp Fuse

FLSR125 - 125Amp Fuse

The FLSR125 is a 125A Class RK5 time-delay fuse rated for applications up to 600V AC and 300V DC. Its dual-element, Slo-Blo design is useful in circuits where brief current surges are expected during normal operation. Instead of opening immediately upon that short-lived inrush, the time-delay characteristic allows the fuse to ride through it while still providing overcurrent protection when needed. The FLSR125 uses a familiar knife-blade configuration and mounts in your compatible fuse blocks, clips, and holders.

Key Features and Benefits

• 125A continuous rating for equipment and circuits specified for a 125-amp fuse.
• Handles applications rated up to 600V AC or 300V DC.
• Slo-Blo/time-delay operation helps accommodate temporary inrush current without opening unnecessarily.
• Dual-element construction provides the specified time-delay response along with overcurrent protection.
• Class RK5 configuration makes identification and replacement matching more straightforward.
• Knife-blade terminals are made for compatible fuse blocks, clips, and holders.
• Non-indicating design.
• The supplied specifications identify the LFR60200 Series as the applicable holder family.
  

Technical Specifications

• Catalog Number: FLSR125
  
• Series: FLSR
  
• Fuse Type: Dual-Element Time-Delay Fuse
  
• Fuse Class: Class RK5
  
• Continuous Current Rating: 125A
  
• Maximum AC Voltage: 600V AC
  
• Maximum DC Voltage: 300V DC
  
• Opening: Slo-Blo / Time Lag (T) / Time Delay
  
• Size: Knife-Blade
  
• DC Interrupting Rating: 20 kA at 300V DC
  
• Listed AC Interrupt Amperage: 200,000A / 300,000A at 600V AC*
  
• Indicating: No
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Listed Holder Family: LFR60200 Series
  

Material Compliance and Certifications

The available product information identifies the FLSR125 as a Class RK5 fuse but does not provide specific material compliance declarations or individual certification listings.

Where It Works Best

The FLSR125 makes sense in equipment that specifically requires a 125A Class RK5 time-delay fuse with a knife-blade design. It's particularly useful where normal operation can produce a brief current spike. The time delay gives those short-lived surges room to pass, rather than treating every temporary increase as a condition requiring the fuse to open.