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Fuse,Class RK5,40A,ECNR Series

Item Number 932483-5
Scanner Description Fuse,Class RK5,40A,Ecnr Series
Weight 1.94 lb
Pkg Qty: 1
$15.40 pkg | $15.40 ea

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Technical Specifications

Pack Quantity 1

Product Description

These 250VAC UL Class RK5 fuses are time delay and nonindicating. They tolerate temporary inrush currents without opening, which prevents nuisance-blowing from motor and equipment startups. Also called slow-blow Class RK5 fuses, these 200kA IR fuses open to disconnect an electrical circuit when exposed to sustained loads and short circuits. They have no indicator for identifying a blown fuse, so they're sometimes used with an indicating fuse block or cover.

UL Class RK5 fuses provide moderate current limitation for general use applications where more current-limiting RK1 fuses aren't needed. These 250VAC or 600VAC fuses have an interrupting rating (IR) of 200kA and are the same size as Class H and K fuses, but have a rejection feature that prevents an accidental downgrade from a current-limiting system. Their modified terminals ensure a match with the rejection clips in Class R fuse holders that prevent the installation of fuses with a lower interrupting capacity. They're typically used in newer equipment, but can also be used with a Class H fuse holder to upgrade older installations from Class H or K fuses for improved overcurrent protection. They are current-limiting to prevent electrical damage by disconnecting circuits before they're exposed to the full magnitude and duration of an overcurrent.


  • Item Fuse
  • Amps 40A
  • AC Voltage Rating 250VAC
  • DC Voltage Rating 125VDC
  • Class RK5
  • Series ECNR
  • Visual Indication Nonindicating
  • Speed Time Delay
  • Body Style Cylindrical
  • Fits Fuse Block Style Rejection
  • Interrupt Rating 200kA at 250VAC, 20kA at 125VDC
  • Fuse Size 3" L x 13/16" dia.
  • Length 3"
  • Diameter 13/16"
  • Equivalent Brand and Series Bussmann FRN-R, Edison ECNR, Littelfuse FLNR, Mersen/Ferraz Shawmut TR-R
  • Equivalent Series ECNR, FLNR, FRN-R, TR-R
  • Compatible Fuse Block Series R250
  • Body Material Fiberglass
  • Element Dual
  • Standards CE, UL 248-12 Guide JDDZ, CSA Certification Class 1422-01
Item Barcode
9324835
  Name Item Description
Grainger Dropship Grainger Dropship 12W256
UNSPSC CODES UNSPSC CODES 39121604
VMRS (ATA) CODES VMRS (ATA) CODES 053-006-009 Fuse,Class RK5,40A,ECNR