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Technical specifications, features, applications and purchasing information.
| Brand | Littelfuse |
| Model Number | KLDR-1 |
| Product Marking | KLDR 1A |
| Product Category | Class CC Time-Delay Fuse |
| Product Series | POWR-GARD KLDR |
| Current Rating | 1 A (1000 mA) |
| AC Voltage Rating | 600 VAC |
| DC Voltage Rating | 300 VDC |
| Fuse Class | UL Class CC |
| Operating Characteristic | Time-Delay |
The Littelfuse KLDR-1 provides a 1 ampere current rating for appropriately specified industrial control circuits and inductive electrical equipment. Its 1000 mA rating supports applications requiring Class CC overcurrent protection.
Rated for compatible electrical circuits up to 600 VAC or 300 VDC. Littelfuse specifies separate AC and DC interrupting ratings, supporting proper selection according to operating voltage and available prospective fault current.
Designed to accommodate temporary magnetizing inrush currents associated with control transformers, solenoids and similar inductive components. The UL opening-time requirement specifies a minimum of 12 seconds at 200% of rated current rather than a fixed clearing time.
Provides a 200 kA RMS symmetrical AC interrupting rating and a separate 20 kA DC interrupting rating. Littelfuse identifies the DC rating as self-certified. The applicable interrupting rating must be compared with the prospective fault current of the installation.
The current-limiting construction helps reduce thermal and magnetic effects during short-circuit events. Its rejection feature helps prevent the installation of unsuitable fuses with lower voltage or interrupting ratings when used with corresponding rejection-type fuse holders.
Features a melamine body, nickel-plated bronze caps and a nominal 10.3 x 38.1 mm cartridge format. Compatible mounting options include appropriately rated Littelfuse L60030C, LPSC/LFPSC, LEC and 571/572 fuse holders.
We support online purchase of the Littelfuse KLDR-1 Class CC Time-Delay Fuse. If you need to make bulk purchases and inquire about other products, please contact our team to inform us of your purchase requirements. We will provide you with information such as quantity quotations, delivery dates, and transportation methods. Confirm the required purchase quantity and packaging configuration before ordering.
What is the Littelfuse KLDR-1?
It is a 1 A Class CC time-delay, current-limiting cartridge fuse in the Littelfuse POWR-GARD KLDR series, intended for compatible control transformer, solenoid and industrial control applications.
What is the manufacturer catalog number?
Littelfuse lists the 1 A model under catalog number KLDR001, with product marking KLDR 1A. KLDR-1 is a commonly used model designation for this current rating.
What is the current rating?
The rated current is 1 ampere, equivalent to 1000 milliamperes.
What are the AC and DC voltage ratings?
The fuse is rated for 600 VAC and 300 VDC. Confirm the applicable circuit voltage and related electrical protection requirements before installation.
What are the AC and DC interrupting ratings?
The AC interrupting rating is 200,000 amperes RMS symmetrical at 600 VAC, while the DC interrupting rating is 20,000 amperes at 300 VDC. Littelfuse identifies the DC interrupting rating as self-certified.
Is KLDR-1 a time-delay or fast-acting fuse?
KLDR-1 is a time-delay fuse. The KLDR series is designed to accommodate temporary magnetizing inrush currents associated with control transformers, solenoids and similar inductive components.
Does KLDR-1 open in exactly 12 seconds at twice its rated current?
No. The UL agency requirement specifies a minimum opening time of 12 seconds at 200% of rated current. This is not a fixed opening time. Refer to the manufacturer's time-current curves for circuit protection analysis.
What are the pre-arcing and total clearing I²t values?
Littelfuse lists a pre-arcing I²t value of 0.4494 A²s and a total clearing I²t value of 5.883 A²s in its electrical specifications table. The total clearing figure corresponds to the manufacturer's 200 kA test condition.
What are the physical dimensions?
The nominal dimensions are 10.3 mm in diameter and 38.1 mm in length, approximately 0.41 inch by 1.50 inches.
What materials and fuse holders are used?
Littelfuse specifies a melamine body with nickel-plated bronze caps. Compatible fuse-holder options include appropriately rated products from the L60030C, LPSC/LFPSC, LEC and 571/572 series.
Is KLDR-1 UL listed and RoHS compliant?
The KLDR datasheet identifies the series as UL Listed under file E81895, CSA Certified under file LR29862 and RoHS compliant. It also references a CE declaration. The DC interrupting rating is manufacturer self-certified.
What should be verified before ordering?
Confirm the KLDR-1 or KLDR001 designation, 1 A current rating, 600 VAC or 300 VDC voltage requirement, applicable interrupting capacity, time-delay characteristics, fuse-holder compatibility and purchase quantity. Littelfuse lists KLDR001.TXP for a 10-piece manufacturer pack and KLDR001.HXP for a 100-piece manufacturer pack; these packaging codes do not determine the quantity supplied in an individual store listing.
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Available in stock (2000)
| Brand | Littelfuse |
| Model Number | KLDR-1 |
| Product Marking | KLDR 1A |
| Product Category | Class CC Time-Delay Fuse |
| Product Series | POWR-GARD KLDR |
| Current Rating | 1 A (1000 mA) |
| AC Voltage Rating | 600 VAC |
| DC Voltage Rating | 300 VDC |
| Fuse Class | UL Class CC |
| Operating Characteristic | Time-Delay |
The Littelfuse KLDR-1 provides a 1 ampere current rating for appropriately specified industrial control circuits and inductive electrical equipment. Its 1000 mA rating supports applications requiring Class CC overcurrent protection.
Rated for compatible electrical circuits up to 600 VAC or 300 VDC. Littelfuse specifies separate AC and DC interrupting ratings, supporting proper selection according to operating voltage and available prospective fault current.
Designed to accommodate temporary magnetizing inrush currents associated with control transformers, solenoids and similar inductive components. The UL opening-time requirement specifies a minimum of 12 seconds at 200% of rated current rather than a fixed clearing time.
Provides a 200 kA RMS symmetrical AC interrupting rating and a separate 20 kA DC interrupting rating. Littelfuse identifies the DC rating as self-certified. The applicable interrupting rating must be compared with the prospective fault current of the installation.
The current-limiting construction helps reduce thermal and magnetic effects during short-circuit events. Its rejection feature helps prevent the installation of unsuitable fuses with lower voltage or interrupting ratings when used with corresponding rejection-type fuse holders.
Features a melamine body, nickel-plated bronze caps and a nominal 10.3 x 38.1 mm cartridge format. Compatible mounting options include appropriately rated Littelfuse L60030C, LPSC/LFPSC, LEC and 571/572 fuse holders.
We support online purchase of the Littelfuse KLDR-1 Class CC Time-Delay Fuse. If you need to make bulk purchases and inquire about other products, please contact our team to inform us of your purchase requirements. We will provide you with information such as quantity quotations, delivery dates, and transportation methods. Confirm the required purchase quantity and packaging configuration before ordering.
What is the Littelfuse KLDR-1?
It is a 1 A Class CC time-delay, current-limiting cartridge fuse in the Littelfuse POWR-GARD KLDR series, intended for compatible control transformer, solenoid and industrial control applications.
What is the manufacturer catalog number?
Littelfuse lists the 1 A model under catalog number KLDR001, with product marking KLDR 1A. KLDR-1 is a commonly used model designation for this current rating.
What is the current rating?
The rated current is 1 ampere, equivalent to 1000 milliamperes.
What are the AC and DC voltage ratings?
The fuse is rated for 600 VAC and 300 VDC. Confirm the applicable circuit voltage and related electrical protection requirements before installation.
What are the AC and DC interrupting ratings?
The AC interrupting rating is 200,000 amperes RMS symmetrical at 600 VAC, while the DC interrupting rating is 20,000 amperes at 300 VDC. Littelfuse identifies the DC interrupting rating as self-certified.
Is KLDR-1 a time-delay or fast-acting fuse?
KLDR-1 is a time-delay fuse. The KLDR series is designed to accommodate temporary magnetizing inrush currents associated with control transformers, solenoids and similar inductive components.
Does KLDR-1 open in exactly 12 seconds at twice its rated current?
No. The UL agency requirement specifies a minimum opening time of 12 seconds at 200% of rated current. This is not a fixed opening time. Refer to the manufacturer's time-current curves for circuit protection analysis.
What are the pre-arcing and total clearing I²t values?
Littelfuse lists a pre-arcing I²t value of 0.4494 A²s and a total clearing I²t value of 5.883 A²s in its electrical specifications table. The total clearing figure corresponds to the manufacturer's 200 kA test condition.
What are the physical dimensions?
The nominal dimensions are 10.3 mm in diameter and 38.1 mm in length, approximately 0.41 inch by 1.50 inches.
What materials and fuse holders are used?
Littelfuse specifies a melamine body with nickel-plated bronze caps. Compatible fuse-holder options include appropriately rated products from the L60030C, LPSC/LFPSC, LEC and 571/572 series.
Is KLDR-1 UL listed and RoHS compliant?
The KLDR datasheet identifies the series as UL Listed under file E81895, CSA Certified under file LR29862 and RoHS compliant. It also references a CE declaration. The DC interrupting rating is manufacturer self-certified.
What should be verified before ordering?
Confirm the KLDR-1 or KLDR001 designation, 1 A current rating, 600 VAC or 300 VDC voltage requirement, applicable interrupting capacity, time-delay characteristics, fuse-holder compatibility and purchase quantity. Littelfuse lists KLDR001.TXP for a 10-piece manufacturer pack and KLDR001.HXP for a 100-piece manufacturer pack; these packaging codes do not determine the quantity supplied in an individual store listing.
