Frequently Asked Questions
What is the Littelfuse KLDR-1/10?
It is a 0.1 A Class CC time-delay, current-limiting cartridge fuse in the Littelfuse POWR-GARD KLDR series, intended for appropriately designed control transformer, solenoid and industrial control applications.
What is the manufacturer catalog number?
The 1/10 A version is identified as KLDR.100 in the Littelfuse manufacturer datasheet. KLDR-1/10 is a commonly used fractional-amperage model designation.
What is the current rating?
The current rating is 0.1 ampere, equal to 100 milliamperes or one-tenth of an ampere.
What are the AC and DC voltage ratings?
The fuse is rated for 600 VAC and 300 VDC. These are separate voltage ratings and should be evaluated according to the intended circuit.
What are the AC and DC interrupting ratings?
The AC interrupting rating is 200,000 amperes RMS symmetrical. The DC interrupting rating is 20,000 amperes and is identified by Littelfuse as self-certified.
Is KLDR-1/10 a time-delay or fast-acting fuse?
KLDR-1/10 is a time-delay fuse. Littelfuse designed the KLDR series to accommodate temporary current surges associated with control transformers, solenoids and similar inductive components.
Does the fuse open in exactly 12 seconds at twice its rated current?
No. Littelfuse specifies a minimum opening time of 12 seconds at 200% of rated current under the UL agency requirements. This is not a fixed opening time. Consult the manufacturer's time-current curves for application analysis.
What are the fuse dimensions?
The nominal dimensions are 10.3 mm in diameter and 38.1 mm in length, equivalent to approximately 0.41 x 1.50 inches.
What materials are used in KLDR-1/10?
Littelfuse specifies a melamine body with nickel-plated bronze caps. The fuse uses a Class CC cartridge configuration with rejection capability.
Which fuse holders can be used?
The manufacturer recommends compatible holders from the L60030C, LPSC/LFPSC Touch-Safe, LEC and 571/572 series. Confirm holder ratings and the specific installation arrangement before selection.
Is KLDR-1/10 UL listed and RoHS compliant?
The Littelfuse KLDR datasheet identifies the series as UL Listed under file E81895, CSA Certified under file LR29862 and RoHS compliant. The manufacturer also provides a CE declaration reference. The listed DC interrupting rating is self-certified by Littelfuse.
What should be checked before ordering?
Verify the KLDR-1/10 or KLDR.100 model designation, 0.1 A current rating, 600 VAC or 300 VDC rating, applicable AC or DC interrupting capacity, time-delay behavior, fuse-holder compatibility and required quantity. The manufacturer lists KLDR.100TXP for a 10-piece pack and KLDR.100HXP for a 100-piece pack; these manufacturer packaging codes do not determine the quantity supplied in an individual store listing.