FLSR250-ID - 250Amp Fuse

FLSR250-ID - 250Amp Fuse

When you're tracking down the right 250A Class RK5 replacement fuse, the small details can make a big difference. The FLSR250-ID (manufacturer reference FLSR250ID) combines a 250-amp continuous current rating, 600V AC maximum rating, 300V DC maximum rating, and time-delay operation in a knife-blade configuration. What separates this model from the standard non-indicating version is right in the name: the FLSR250-ID is an indicating fuse. That feature can make fuse-status checks more convenient during troubleshooting and routine maintenance.

Key Features and Benefits

• 250A continuous current rating – Built for equipment and circuits specified for a 250-amp Class RK5 fuse.
• Indicating design – Provides a useful fuse status indication that simplifies maintenance and troubleshooting600 V0V AC maximum rating – Supports compatible AC applications requiring a fuse rated up to 60Vt300 V00V DC maximum rating – Also rated for correctly specified DC applications up to 3Vlts.
• Slo-Blo / time-delay operation – Accommodates appropriate temporary inrush and startup currents while retaining the fuse's intended overcurrent-protection function.
• Dual-element construction – Gives the FLSR250-ID its time-delay operating characteristics.
• Class RK5 configuration – An important detail when matching an existing fuse or equipment specification.
• Knife-blade construction – Intended for compatible fuse blocks, clips, and holders.
  

Technical Specifications

• Catalog Number: FLSR250-ID
  
• Manufacturer Reference: FLSR250ID
  
• Series: FLSR_ID
  
• Product Type: Time-Delay Indicating Fuse
  
• Family Style: Dual Element Fuse
  
• Fuse Class: Class RK5
  
• Continuous Current Rating: 250A
  
• Maximum AC Voltage: 600V AC
  
• Maximum DC Voltage: 300V DC
  
• Opening Characteristic: Slo-Blo / Time Lag (T) / Time Delay
  
• Construction / Size: Knife-Blade
  
• Indicating: Yes
  
• DC Interrupting Rating: 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 available product information specifically identifies the FLSR250-ID as a Class RK5 fuse. However, catalog-specific UL, CSA, RoHS, or other material-compliance declarations were not included in the specifications provided here. Rather than assuming that a certification for another fuse in the same series automatically applies to this exact catalog number, those requirements should be checked against the current documentation for the FLSR250ID.

Where It Works Best

The FLSR250-ID makes sense when the application specifically calls for a 250A Class RK5 time-delay fuse and an indicating configuration is preferred or required. In circuits where appropriate short-duration startup or inrush current occurs during normal operation, the time-delay characteristics of that current help distinguish those temporary conditions from sustained overcurrent conditions.

The indicating feature is particularly useful from a maintenance standpoint. When you're checking electrical equipment after a fault or investigating why a circuit is down, indicating fuse status can make the initial inspection more straightforward.