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Series: KLKR
KLKR Series - Class CC Fast-Acting Fuse
  • KLKR series Class CC fuses are fast-acting fuses intended for general-purpose branch circuit protection.
  • Their compact size, fast-acting overload response, and their highly current limiting design make them ideal for use in OEM equipment and control panels.
  • Solid-state devices such as SCRs and other electronic equipment generally require fast-acting protection.
  • Compared to other UL Listed fuses, Class CC fuses are the most current limiting, rating for rating.
  • Because they are physically compact, they provide this superior protection in a fraction of the space required by other fuse classes.
For example, when 600V three-pole, 30 ampere Class R fuse blocks are replaced by Littelfuse Class CC fuse blocks, panel-mounting space is reduced approximately 70%. This is especially important when a panel contains many fuses to protect multiple circuit components.
 
Applications:
Three types of Class CC Fuses, specifically designed to protect different types of components:
  1. Motor protection – CCMR series; dual-element, time-delay fuses specifically designed to protect motor circuits up to 40 HP**.
  2. Small transformer protection (control power transformers) – KLDR series, time-delay fuses designed to withstand the high magnetizing inrush of transformers.
  3. General purpose protection of equipment requiring fast overload protection – KLKR series, fast-acting fuses used for protection of equipment containing solid-state devices or other electronic components requiring fast response on overloads.
Safety:
  • 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 fuses are the smallest 600V, 200,000 A.I.R. fuses approved for branch circuit protection.
Economical:
  • Current limiting design often permits use of readily available, less costly equipment.


Electrical Characteristics

Access specifications, certifications, check availability and order parts below:

Check distributor stock availability by clicking on the [CHECK] link. View certification PDF files by clicking on the certification logo. View the part details by clicking on the part number. To order sample parts, click on the [ADD] link. Click on the 'Key' button to view definitions for each column header. Sort parts by clicking on the column you wish to sort by.


CatalogNo Certs. Amps (A) VAC (V) VDC (V) IR Stock Sample
Cart
KLKR.100 0.1 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR.125 0.125 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR.200 0.2 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR.250 0.25 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR.300 0.3 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR.500 0.5 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR.750 0.75 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR001 1 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR002 2 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR003 3 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR004 4 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR005 5 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR006 6 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR007 7 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR008 8 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR009 9 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR01.5 1.5 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR010 10 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR012 12 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR015 15 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR02.5 2.5 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR020 20 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR025 25 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR03.5 3.5 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]
KLKR030 30 600 300 200000A@600VAC
20000A@300VDC 		[Check] [Add]