FLNR003-ID - 3Amp Fuse

FLNR003-ID - 3Amp Fuse

When a circuit has normal startup surges, you need a fuse that won't respond to every brief current spike. The Littelfuse FLNR003-ID is a 3A Class RK5 time-delay fuse made for exactly that kind of application. This dual-element industrial cartridge fuse is rated for 250VAC and 125VDC, with Slo-Blo/time-delay operation that allows temporary inrush currents to pass while still protecting the circuit from sustained overloads and short circuits. If you're replacing an existing fuse, it's important to match the full specification. For equipment requiring a 3-amp, 250V Class RK5 time-delay fuse, the FLNR003-ID provides the specific electrical characteristics needed to make the right match without guesswork.

Key Features and Benefits

• 3-amp continuous rating for circuits requiring low-amperage overcurrent protection.
• Class RK5 design for industrial and commercial electrical applications.
• Dual-element time-delay operation handles brief, normal current surges without opening unnecessarily.
• Rated for a maximum of 250VAC and 125VDC.
• High interrupting capability of up to 300kA AC and 20kA DC.
• Slo-Blo/time-lag characteristics are useful in applications where temporary inrush current is expected.
• Industrial cartridge construction works with compatible fuse blocks, clips, and holders.
• Non-indicating design for installations that don't require visual indication of the fuse.
  

Technical Specifications

• Manufacturer: Littelfuse
  
• Catalog Number: FLNR003-ID
  
• Series: FLNR
  
• Product Type: Industrial Cartridge Fuse
  
• Fuse Class: Class RK5
  
• Current Rating: 3A
  
• Maximum AC Voltage: 250VAC
  
• Maximum DC Voltage: 125VDC
  
• Interrupting Rating: Up to 300kA AC; 20kA DC
  
• Opening Characteristic: Slo-Blo / Time Lag / Time Delay
  
• Family Style: Dual Element Fuse
  
• Construction: Cartridge Style
  
• Indicating: No
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Compatible Holder Series: LFR25030 Series
  

Material Compliance and Certifications

The FLNR003-ID is a Class RK5 fuse, with published electrical ratings that include a maximum operating voltage of 250VAC or 125VDC and interrupting capacity of up to 300kA AC and 20kA DC.

For installations that must meet a particular certification, code, or material-compliance requirement, check the fuse markings and applicable product documentation against the requirements of the equipment and installation. This is especially important when replacing a fuse in an existing system, where maintaining the specified fuse class and electrical ratings is essential.

Where It Works Best

The FLNR003-ID makes sense in industrial and commercial electrical systems where short periods of higher current are a normal part of operation. Because it's a dual-element time-delay fuse, it can ride through temporary inrush conditions that might cause an unnecessarily fast-opening fuse to operate.