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Technical specifications, features, applications and purchasing information.
| Brand | Littelfuse |
| Model Number | KLDR-3/10 |
| Product Category | Class CC Time-Delay Fuse |
| Product Series | POWR-GARD KLDR |
| Current Rating | 0.3 A (300 mA, 3/10 A) |
| AC Voltage Rating | 600 VAC |
| DC Voltage Rating | 300 VDC |
| Fuse Class | UL Class CC |
| Operating Characteristic | Time-Delay |
The Littelfuse KLDR-3/10 provides a 0.3 ampere current rating for appropriately specified low-current industrial control circuits and inductive equipment. Its 300 mA rating supports applications requiring three-tenths ampere Class CC fuse protection.
Rated for compatible electrical circuits up to 600 VAC or 300 VDC. The manufacturer specifies separate AC and DC interrupting ratings, supporting suitable electrical protection designs that meet the applicable operating voltage and fault-current requirements.
Designed to accommodate temporary magnetizing current surges associated with control transformers, solenoids and similar inductive components. The UL opening-time requirement specifies at least 12 seconds at 200% of rated current rather than a fixed opening time.
Offers a 200 kA RMS symmetrical AC interrupting rating and a separately specified 20 kA DC interrupting rating. Littelfuse identifies the DC rating as self-certified. Select the fuse based on the corresponding circuit voltage and available short-circuit current.
The current-limiting design helps reduce thermal and magnetic effects of short-circuit currents. Its rejection capability helps prevent installation of unsuitable lower-voltage or lower-interrupting-rated fuses when used with corresponding rejection-type holders.
Features a melamine body with nickel-plated bronze caps in a nominal 10.3 x 38.1 mm cartridge format. Suitable accessories include compatible Littelfuse L60030C, LPSC/LFPSC, LEC and 571/572 fuse holder series.
We support online purchase of the Littelfuse KLDR-3/10 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-3/10?
It is a 0.3 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 3/10 A version is identified as KLDR.300 in the Littelfuse manufacturer datasheet. KLDR-3/10 is a fractional-amperage model designation corresponding to this rating.
What is the current rating?
The rated current is 0.3 ampere, equivalent to 300 milliamperes or three-tenths of an ampere.
What are the AC and DC voltage ratings?
The fuse is rated for 600 VAC and 300 VDC. Confirm the applicable voltage rating and circuit requirements before installation.
What are the AC and DC interrupting ratings?
The AC interrupting rating is 200,000 amperes RMS symmetrical, while the DC interrupting rating is 20,000 amperes. Littelfuse identifies the DC interrupting rating as self-certified.
Is KLDR-3/10 a time-delay or fast-acting fuse?
KLDR-3/10 is a time-delay fuse. The KLDR series is designed to tolerate temporary magnetizing inrush currents from control transformers, solenoids and similar inductive components.
Does KLDR-3/10 open in exactly 12 seconds at twice its rated current?
No. The UL agency requirement specifies an opening time of at least 12 seconds at 200% of the rated current. This is a minimum requirement, not a fixed clearing time. Consult the manufacturer's time-current curves for circuit design.
What are the pre-arcing and total clearing I²t values?
Littelfuse specifies a pre-arcing I²t value of 0.0111 A²s and a total clearing I²t value of 0.1005 A²s in the electrical specifications table. The total clearing figure is presented for 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 holder options include appropriately rated products in the L60030C, LPSC/LFPSC, LEC and 571/572 series.
Is KLDR-3/10 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-3/10 or KLDR.300 designation, 0.3 A current rating, 600 VAC or 300 VDC voltage requirement, applicable AC or DC interrupting capacity, time-delay characteristics, fuse-holder compatibility and purchase quantity. Littelfuse lists KLDR.300TXP for a 10-piece manufacturer pack and KLDR.300HXP for a 100-piece manufacturer pack; these 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-3/10 |
| Product Category | Class CC Time-Delay Fuse |
| Product Series | POWR-GARD KLDR |
| Current Rating | 0.3 A (300 mA, 3/10 A) |
| AC Voltage Rating | 600 VAC |
| DC Voltage Rating | 300 VDC |
| Fuse Class | UL Class CC |
| Operating Characteristic | Time-Delay |
The Littelfuse KLDR-3/10 provides a 0.3 ampere current rating for appropriately specified low-current industrial control circuits and inductive equipment. Its 300 mA rating supports applications requiring three-tenths ampere Class CC fuse protection.
Rated for compatible electrical circuits up to 600 VAC or 300 VDC. The manufacturer specifies separate AC and DC interrupting ratings, supporting suitable electrical protection designs that meet the applicable operating voltage and fault-current requirements.
Designed to accommodate temporary magnetizing current surges associated with control transformers, solenoids and similar inductive components. The UL opening-time requirement specifies at least 12 seconds at 200% of rated current rather than a fixed opening time.
Offers a 200 kA RMS symmetrical AC interrupting rating and a separately specified 20 kA DC interrupting rating. Littelfuse identifies the DC rating as self-certified. Select the fuse based on the corresponding circuit voltage and available short-circuit current.
The current-limiting design helps reduce thermal and magnetic effects of short-circuit currents. Its rejection capability helps prevent installation of unsuitable lower-voltage or lower-interrupting-rated fuses when used with corresponding rejection-type holders.
Features a melamine body with nickel-plated bronze caps in a nominal 10.3 x 38.1 mm cartridge format. Suitable accessories include compatible Littelfuse L60030C, LPSC/LFPSC, LEC and 571/572 fuse holder series.
We support online purchase of the Littelfuse KLDR-3/10 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-3/10?
It is a 0.3 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 3/10 A version is identified as KLDR.300 in the Littelfuse manufacturer datasheet. KLDR-3/10 is a fractional-amperage model designation corresponding to this rating.
What is the current rating?
The rated current is 0.3 ampere, equivalent to 300 milliamperes or three-tenths of an ampere.
What are the AC and DC voltage ratings?
The fuse is rated for 600 VAC and 300 VDC. Confirm the applicable voltage rating and circuit requirements before installation.
What are the AC and DC interrupting ratings?
The AC interrupting rating is 200,000 amperes RMS symmetrical, while the DC interrupting rating is 20,000 amperes. Littelfuse identifies the DC interrupting rating as self-certified.
Is KLDR-3/10 a time-delay or fast-acting fuse?
KLDR-3/10 is a time-delay fuse. The KLDR series is designed to tolerate temporary magnetizing inrush currents from control transformers, solenoids and similar inductive components.
Does KLDR-3/10 open in exactly 12 seconds at twice its rated current?
No. The UL agency requirement specifies an opening time of at least 12 seconds at 200% of the rated current. This is a minimum requirement, not a fixed clearing time. Consult the manufacturer's time-current curves for circuit design.
What are the pre-arcing and total clearing I²t values?
Littelfuse specifies a pre-arcing I²t value of 0.0111 A²s and a total clearing I²t value of 0.1005 A²s in the electrical specifications table. The total clearing figure is presented for 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 holder options include appropriately rated products in the L60030C, LPSC/LFPSC, LEC and 571/572 series.
Is KLDR-3/10 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-3/10 or KLDR.300 designation, 0.3 A current rating, 600 VAC or 300 VDC voltage requirement, applicable AC or DC interrupting capacity, time-delay characteristics, fuse-holder compatibility and purchase quantity. Littelfuse lists KLDR.300TXP for a 10-piece manufacturer pack and KLDR.300HXP for a 100-piece manufacturer pack; these codes do not determine the quantity supplied in an individual store listing.
