KLDR2.25 - KLDR Series

Series: KLDR
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  • KLDR fuses are time-delay fuses specifically designed for the protection of control transformers, solenoids and similar inductive components with high magnetizing currents during the first half-cycle.
  • They closely match most control power transformer characteristics, which permits the time delay fuses to be sized in accordance with the latest revisions of UL 508 (Industrial Control) and UL 845 (Motor Control Centers).
  • When the time delay of KLDR fuses is adequate to carry motor starting current, they provide excellent protection of motor branch circuits containing IEC or NEMA rated motor controllers or contractors.
  • Compared to other UL Listed fuses, Class CC time delay fuses are the most current limiting, rating for rating.
  • Time delay fuses provide this superior protection in a fraction of the space required by other fuse classes. — For example, when 600 V three-pole, 30 A Class R fuse blocks are replaced by Littelfuse Class CC fuse blocks, panel-mounting space is reduced approximately 70%.


Small transformer protection (control power transformers) – KLDR series, time delay fuses designed to withstand the high magnetizing inrush of transformers.


  • 200,000 A.I.R. — Reliable interruption of all overcurrents up to 200,000 amperes.
  • Extremely current limiting — Reduces damage caused by heating and magnetic effects of short-circuit currents…stops damaging short-circuit faster than any mechanical protective device.

Space Saving:

  • Class CC time delay fuses are the smallest 600V, 200,000 A.I.R. fuses approved for branch circuit protection.
Property (Mouseover for details) Value
Ampere Rating (A) 2.25
VAC (V) 600
VDC (V) 300
Interrupting Rating 200 kA @ 600 Vac
Opening Slo-Blo/Time Lag (T)/Time Delay
Size Class CC
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
KLDR2.25HXP RoHS No 03/15/2006 PbFree No 02/11/2013 No
KLDR2.25TXP RoHS No 03/15/2006 PbFree No 02/11/2013 CoC_RoHS9_KLDR2.25TXP_09-19-2019 REACH201_Declaration_with_Pb_KLDR2.25TXP_09-19-2019 No
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