FLSR300-ID - 300Amp Fuse

FLSR300-ID - 300Amp Fuse

When you're replacing a 300A Class RK5 fuse, the amperage printed on the label is only part of the story. The FLSR300-ID is a 300-amp, dual-element time-delay fuse rated for applications up to 600V AC and 300V DC, with knife-blade construction and an indicating design. Its Slo-Blo/Time Lag (T) characteristic allows the fuse to accommodate appropriate short-duration startup and inrush currents, rather than respond as quickly as a fast-acting fuse.

Key Features and Benefits

• 300A continuous current rating – Matches equipment specifications that specifically call for a 300-amp fuse.
• Class RK5 fuse – An important classification to verify when selecting a replacement.
• Time-delay performance – Allows appropriate temporary startup or inrush current without the fast-acting fuse's response characteristics.
• Dual-element construction – Provides the operating characteristics associated with the FLSR-ID time-delay fuse family.
• Indicating design – Helps maintenance personnel check fuse status during inspection and troubleshooting.
• Knife-blade configuration – Intended for compatible fuse blocks, clips, and holders.
  

Technical Specifications

• Catalog Number: FLSR300-ID
  
• Manufacturer Reference: FLSR300ID
  
• Series: FLSR_ID
  
• Fuse Class: Class RK5
  
• Fuse Type: Dual-Element Time-Delay Fuse
  
• Continuous Current Rating: 300A
  
• Maximum AC Voltage: 600V AC
  
• Maximum DC Voltage: 300V DC
  
• Opening Characteristic: Slo-Blo / Time Lag (T) / Time Delay
  
• Construction: Knife-Blade
  
• Family Style: Dual Element Fuse
  
• Indicating: Yes
  
• DC Interrupting Rating: 20,000A (20 kA) at 300V DC
  
• Manufacturer-Listed AC Interrupt Amperage: 200,000A and 300,000A at 600V AC*
  
• Mounting Method: Fuse Block / Clip / Holder
  
• PG Holder: LFR60400 Series
  

Material Compliance and Certifications

The supplied product information confirms that the FLSR300-ID is a Class RK5 fuse. Still, it does not provide sufficient catalog-specific information to accurately state individual UL, CSA, RoHS, or other material compliance and certification declarations.

Where It Works Best

The FLSR300-ID belongs in the conversation when you're looking for a 300A Class RK5 time-delay fuse with an indicating feature and knife-blade construction. Its time-delay behavior is particularly relevant in correctly specified equipment where temporary startup or inrush current is expected as part of normal operation. Rather than exhibiting the response characteristics of a fast-acting fuse, the FLSR300-ID is designed to tolerate appropriate short-duration current increases.