KLKR02.5 Fuses - KLKR Series - Class CC Fast-Acting Fuse

Part Number: KLKR02.5

Series: KLKR

Class CC - Series Data Sheet
Littelfuse-Fuses-CC-CD.pdf
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Last Uploaded: October 12, 2011

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:

Motor protection – CCMR series; dual-element, time-delay fuses specifically designed to protect motor circuits up to 40 HP**.
Small transformer protection (control power transformers) – KLDR series, time-delay fuses designed to withstand the high magnetizing inrush of transformers.
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.

Help	Property	Value
It is established by Littelfuse as a value of current which the fuse, fuseholder, fuse clip or other fuse accessory can carry, based on a controlled set of test conditions. Close Info	Ampere Rating (A)	2.5
The maximum RMS AC voltage and/or the maximum DC voltage at which the fuse is designed to operate. For example, fuses rated at 600 volts and below may be applied at any voltage less than their rating. There is no rule for applying AC fuses in DC circuits such as applying the fuse at half its AC voltage rating. Fuses used on DC circuits must have DC ratings. Close Info	VDC (V)	300
The maximum rms AC voltage and/or the maximum DC voltage at which the fuse is designed to operate. For example, fuses rated at 600 volts and below may be applied at any voltage less than their rating. There is no rule for applying AC fuses in DC circuits such as applying the fuse at half its AC voltage rating. Fuses used on DC circuits must have DC ratings. Close Info	VAC (V)	600
Package Size/Form Factor Close Info	Package Size	Class CC
Refers to how rapidly the fuse responds to various current overloads. Fuse characteristics can be classified into three general categories: very fast-acting, fast-acting or Slo-Blo® (time delay)fuse. The distinguishing feature of Slo-Blo fuses is that these fuses have additional thermal inertia (surge withstand) designed to tolerate normal initial or start-up overload pulse. Close Info	Opening	Fast-Acting (F)
Close Info	Interrupt Rating	200000A@600VAC
Close Info	Interrupt Rating	20000A@300VDC