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Cylindrical cartridge fuse, brass ends, white ceramic body

Littelfuse

Littelfuse FLNR035 35A Time Delay Fuse 250VAC/125VDC Class RK5

SKU CH-WVZQ-2F5CN

A 35 A time-delay cartridge fuse rated 250 VAC/125 VDC with 200 kA AC and 20 kA DC interrupting capacity

  • 35 A rating protects 250 VAC and 125 VDC circuits
  • 200 000 A interrupting capacity clears severe faults safely
  • Time-delay dual element tolerates motor-start surges
  • Rejection-style cartridge prevents wrong-fuse installation
  • 13/16 in diameter by 3 in length fits standard RK5 holders

Application

This Littelfuse FLNR035 is a 35 Amp Class RK5 cartridge fuse designed for AC and DC circuit protection. It serves industrial maintenance teams and electrical contractors who need reliable overcurrent protection for motors, transformers and control panels. The dual-element construction provides time-delay performance to withstand temporary inrush currents without nuisance opening.

Installation

The fuse fits standard Class RK5 rejection clips, preventing insertion of lower-rated fuses and ensuring correct coordination. Its 13/16 inch diameter by 3 inch length matches common fuse block dimensions for straightforward replacement. The 200,000 Amp VAC interrupting rating handles high fault currents, while the 20,000 Amp VDC rating covers DC circuits up to 125 Volts.

Capacity

Rated for 250 Volts AC and 125 Volts DC, this fuse protects circuits carrying up to 35 Amps continuously. The time-delay characteristic accommodates motor starting surges and transformer magnetising currents. It is not suited for applications requiring faster-acting protection or for systems operating above the stated voltage and interrupting limits.

Highlights

  • 35 A rating protects 250 VAC and 125 VDC circuits
  • 200 000 A interrupting capacity clears severe faults safely
  • Time-delay dual element tolerates motor-start surges
  • Rejection-style cartridge prevents wrong-fuse installation
  • 13/16 in diameter by 3 in length fits standard RK5 holders

Specifications

BrandLittelfuse

Questions about this item

How long will a 35 A time-delay fuse hold before opening under a sustained motor-start overload?

The dual-element, time-delay design carries temporary inrush currents above 35 A without nuisance opening, but the exact opening time depends on the magnitude of the overload current.

How much heat does the cartridge body dissipate when it runs continuously at 35 A in a 250 VAC panel?

The fuse is rated for 250 VAC and 125 VDC at 35 A with a 200000 A interrupting rating; continuous operation at rated current produces normal I²R heating inside the 13/16 in. diameter by 3 in. cartridge.

What fuse block or holder accepts the 13/16 in. diameter rejection-style cartridge?

The 13/16 in. diameter by 3 in. rejection-style cartridge fits only Class RK5 fuse blocks or disconnects that have matching rejection clips.

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