FLNR225 - 225 Amp Fuse

FLNR225 - 225 Amp Fuse

When your circuit has to handle the normal surge that comes with starting motors or other equipment, the right time-delay fuse can make a real difference. The FLNR225 is a 225-amp Class RK5 dual-element fuse with Slo-Blo/time-delay operation, designed to tolerate short periods of inrush current while still providing overcurrent protection. It is rated for 250VAC and 125VDC applications and features a familiar knife-blade design for use with compatible fuse blocks, clips, and holders.

Key Features and Benefits

• 225-amp rating for equipment and circuits requiring a 225A fuse.
• Class RK5, dual-element construction combines overcurrent protection with time-delay performance.
• Slo-Blo/time-delay operation helps accommodate temporary startup and inrush currents without unnecessary fuse opening.
• Rated for applications up to 250VAC or 125VDC.
• Knife-blade construction fits compatible fuse blocks, clips, and holders.
• A good choice for compatible equipment where short-duration current surges are part of normal operation.
• Non-indicating design keeps the construction simple.
  

Technical Specifications

• Catalog Number: FLNR225
  
• Series: FLNR
  
• Fuse Type: Dual-Element Time-Delay Fuse
  
• Fuse Class: Class RK5
  
• Current Rating: 225A
  
• Maximum AC Voltage: 250VAC
  
• Maximum DC Voltage: 125VDC
  
• Opening: Slo-Blo / Time Lag (T) / Time Delay
  
• AC Interrupting Rating: Up to 300 kA AC
  
• DC Interrupting Rating: 20 kA DC
  
• Size / Style: Knife-Blade
  
• Indicating: No
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Holder Series: LFR25400 Series
  

Material Compliance and Certifications

The FLNR225 belongs to the Class RK5 fuse category. Because certification and material-compliance requirements can vary by installation, project, and jurisdiction, the applicable documentation for the exact FLNR225 should be checked when specific approvals or compliance declarations are required.

This is especially important in commercial and industrial work, where the fuse must meet not only the equipment's electrical requirements but also the applicable installation standards.

Where It Works Best

The FLNR225 makes the most sense in commercial and industrial circuits that call for a 225A Class RK5 time-delay fuse, particularly where equipment can draw a temporary burst of current during startup. Think motors, transformers, machinery, motor-driven equipment, and similar inductive loads where brief inrush current is expected as part of everyday operation.

That time-delay characteristic is important. Rather than reacting immediately to every short-lived current increase, the fuse is designed to tolerate appropriate temporary surges while still protecting against sustained overcurrent conditions.