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Technical specifications, features, applications and purchasing information.
| Brand | Littelfuse |
| Model Number | KLKR-10 |
| Manufacturer Catalog Number | KLKR010 |
| Product Marking | KLKR 10A |
| Product Category | Class CC Fast-Acting Fuse |
| Product Series | POWR-GARD KLKR |
| Current Rating | 10 A (10000 mA) |
| AC Voltage Rating | 600 VAC |
| DC Voltage Rating | 300 VDC |
| Fuse Class | UL Class CC |
| Nominal Dimensions | 10.3 x 38.1 mm (0.41 x 1.50 in) |
The Littelfuse KLKR-10 provides a 10 ampere current rating, equivalent to 10000 milliamperes. It is designed for appropriately specified industrial electrical equipment, control circuits and general-purpose branch circuit applications requiring Class CC fast-acting overcurrent protection.
The KLKR series provides fast-acting protection for electrical circuits requiring a rapid response to overload conditions. Unlike the Littelfuse KLDR time-delay series, KLKR fuses are intended for applications requiring fast overload protection. Expected startup currents and temporary inrush conditions must be evaluated during fuse selection.
The KLKR-10 is rated for compatible AC circuits up to 600 VAC and DC circuits up to 300 VDC. Separate AC and DC voltage ratings support protective-device selection according to operating voltage, circuit requirements and available prospective short-circuit current.
The KLKR series provides an AC interrupting rating of 200 kA RMS symmetrical and a separate DC interrupting rating of 20 kA. Littelfuse identifies the DC rating as manufacturer self-certified. Available prospective fault current must remain within the applicable interrupting capacity.
The current-limiting design helps reduce heating and magnetic effects associated with short-circuit events. Rejection-style construction helps prevent installation of fuses with insufficient voltage or interrupting ratings when used with compatible Class CC rejection-type fuse holders.
Littelfuse specifies a total clearing I²t of 344 A²s at its 200 kA test condition and a power loss of 1.56 W at 100% rated current for KLKR010.T. The fuse uses a melamine body, nickel-plated bronze caps and a nominal 10.3 x 38.1 mm cartridge format.
We support online purchase of the Littelfuse KLKR-10 Class CC Fast-Acting 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. Please verify the required model, current rating and purchase quantity before ordering.
What is the Littelfuse KLKR-10?
It is a 10 A Class CC fast-acting, current-limiting cartridge fuse from the Littelfuse POWR-GARD KLKR series, intended for general-purpose branch circuit protection and applications requiring fast overload response.
What is the manufacturer catalog number?
The manufacturer catalog number is KLKR010. The product marking is KLKR 10A, and Littelfuse lists KLKR010.T as its manufacturer ordering number for a 10-piece pack.
What is the current rating of KLKR-10?
The rated current is 10 amperes, equivalent to 10000 milliamperes.
What are the AC and DC voltage ratings?
Littelfuse specifies 600 VAC and 300 VDC for the KLKR series. The circuit operating voltage must remain within the applicable AC or DC rating.
What are the interrupting ratings?
The AC interrupting rating is 200,000 amperes RMS symmetrical, and the DC interrupting rating is 20,000 amperes. Littelfuse identifies the DC interrupting rating as manufacturer self-certified.
Is KLKR-10 fast-acting or time-delay?
KLKR-10 is a fast-acting fuse. It belongs to the KLKR series, which is designed for fast overload protection. The KLDR series has different time-delay characteristics and should not be considered electrically identical.
Can KLKR-10 replace a KLDR-10 fuse?
Not automatically. Although both are Class CC fuses rated at 10 A, KLKR is fast-acting while KLDR is time-delay. Replacement suitability depends on circuit design, normal inrush current, overload response and protective-device coordination requirements.
What is the total clearing I²t value of KLKR-10?
Littelfuse specifies a total clearing I²t of 344 A²s for KLKR010.T under the manufacturer's 200 kA test condition. This value is specific to the 10 A rating and must not be substituted with data from another KLKR model.
What is the power loss at rated current?
Littelfuse specifies a power loss of 1.56 W at 100% rated current for KLKR010.T. The manufacturer's electrical table does not specify a numerical power-loss value at 80% rated current for this model. Consider the applicable operating conditions when evaluating fuse-holder heat dissipation.
What are the dimensions and construction materials?
The nominal cartridge dimensions are 10.3 mm in diameter and 38.1 mm in length, approximately 0.41 x 1.50 inches. The KLKR series uses a melamine body and nickel-plated bronze caps. Littelfuse specifies a series weight of 15.42 g for ratings from 1.5 A through 30 A.
Which fuse holders are recommended?
Littelfuse lists the L60030C and LPSC/LFPSC Touch-Safe fuse holder series as accessories. Verify Class CC compatibility and the required electrical ratings before installation.
Is KLKR-10 UL listed and RoHS compliant?
The KLKR series is UL Listed under file E81895 and CSA Certified under file LR29862. Littelfuse also identifies RoHS compliance and references CE Declaration of Conformity KLKR_210128_1. The DC interrupting rating is separately manufacturer self-certified.
What should be verified before ordering KLKR-10?
Confirm the KLKR-10 or KLKR010 designation, 10 A current rating, applicable 600 VAC or 300 VDC circuit requirement, fast-acting characteristic, interrupting capacity, Class CC fuse-holder compatibility and desired purchase quantity. Littelfuse lists KLKR010.T for a manufacturer 10-piece pack; this does not establish the quantity supplied by an individual store listing.
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| Brand | Littelfuse |
| Model Number | KLKR-10 |
| Manufacturer Catalog Number | KLKR010 |
| Product Marking | KLKR 10A |
| Product Category | Class CC Fast-Acting Fuse |
| Product Series | POWR-GARD KLKR |
| Current Rating | 10 A (10000 mA) |
| AC Voltage Rating | 600 VAC |
| DC Voltage Rating | 300 VDC |
| Fuse Class | UL Class CC |
| Nominal Dimensions | 10.3 x 38.1 mm (0.41 x 1.50 in) |
The Littelfuse KLKR-10 provides a 10 ampere current rating, equivalent to 10000 milliamperes. It is designed for appropriately specified industrial electrical equipment, control circuits and general-purpose branch circuit applications requiring Class CC fast-acting overcurrent protection.
The KLKR series provides fast-acting protection for electrical circuits requiring a rapid response to overload conditions. Unlike the Littelfuse KLDR time-delay series, KLKR fuses are intended for applications requiring fast overload protection. Expected startup currents and temporary inrush conditions must be evaluated during fuse selection.
The KLKR-10 is rated for compatible AC circuits up to 600 VAC and DC circuits up to 300 VDC. Separate AC and DC voltage ratings support protective-device selection according to operating voltage, circuit requirements and available prospective short-circuit current.
The KLKR series provides an AC interrupting rating of 200 kA RMS symmetrical and a separate DC interrupting rating of 20 kA. Littelfuse identifies the DC rating as manufacturer self-certified. Available prospective fault current must remain within the applicable interrupting capacity.
The current-limiting design helps reduce heating and magnetic effects associated with short-circuit events. Rejection-style construction helps prevent installation of fuses with insufficient voltage or interrupting ratings when used with compatible Class CC rejection-type fuse holders.
Littelfuse specifies a total clearing I²t of 344 A²s at its 200 kA test condition and a power loss of 1.56 W at 100% rated current for KLKR010.T. The fuse uses a melamine body, nickel-plated bronze caps and a nominal 10.3 x 38.1 mm cartridge format.
We support online purchase of the Littelfuse KLKR-10 Class CC Fast-Acting 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. Please verify the required model, current rating and purchase quantity before ordering.
What is the Littelfuse KLKR-10?
It is a 10 A Class CC fast-acting, current-limiting cartridge fuse from the Littelfuse POWR-GARD KLKR series, intended for general-purpose branch circuit protection and applications requiring fast overload response.
What is the manufacturer catalog number?
The manufacturer catalog number is KLKR010. The product marking is KLKR 10A, and Littelfuse lists KLKR010.T as its manufacturer ordering number for a 10-piece pack.
What is the current rating of KLKR-10?
The rated current is 10 amperes, equivalent to 10000 milliamperes.
What are the AC and DC voltage ratings?
Littelfuse specifies 600 VAC and 300 VDC for the KLKR series. The circuit operating voltage must remain within the applicable AC or DC rating.
What are the interrupting ratings?
The AC interrupting rating is 200,000 amperes RMS symmetrical, and the DC interrupting rating is 20,000 amperes. Littelfuse identifies the DC interrupting rating as manufacturer self-certified.
Is KLKR-10 fast-acting or time-delay?
KLKR-10 is a fast-acting fuse. It belongs to the KLKR series, which is designed for fast overload protection. The KLDR series has different time-delay characteristics and should not be considered electrically identical.
Can KLKR-10 replace a KLDR-10 fuse?
Not automatically. Although both are Class CC fuses rated at 10 A, KLKR is fast-acting while KLDR is time-delay. Replacement suitability depends on circuit design, normal inrush current, overload response and protective-device coordination requirements.
What is the total clearing I²t value of KLKR-10?
Littelfuse specifies a total clearing I²t of 344 A²s for KLKR010.T under the manufacturer's 200 kA test condition. This value is specific to the 10 A rating and must not be substituted with data from another KLKR model.
What is the power loss at rated current?
Littelfuse specifies a power loss of 1.56 W at 100% rated current for KLKR010.T. The manufacturer's electrical table does not specify a numerical power-loss value at 80% rated current for this model. Consider the applicable operating conditions when evaluating fuse-holder heat dissipation.
What are the dimensions and construction materials?
The nominal cartridge dimensions are 10.3 mm in diameter and 38.1 mm in length, approximately 0.41 x 1.50 inches. The KLKR series uses a melamine body and nickel-plated bronze caps. Littelfuse specifies a series weight of 15.42 g for ratings from 1.5 A through 30 A.
Which fuse holders are recommended?
Littelfuse lists the L60030C and LPSC/LFPSC Touch-Safe fuse holder series as accessories. Verify Class CC compatibility and the required electrical ratings before installation.
Is KLKR-10 UL listed and RoHS compliant?
The KLKR series is UL Listed under file E81895 and CSA Certified under file LR29862. Littelfuse also identifies RoHS compliance and references CE Declaration of Conformity KLKR_210128_1. The DC interrupting rating is separately manufacturer self-certified.
What should be verified before ordering KLKR-10?
Confirm the KLKR-10 or KLKR010 designation, 10 A current rating, applicable 600 VAC or 300 VDC circuit requirement, fast-acting characteristic, interrupting capacity, Class CC fuse-holder compatibility and desired purchase quantity. Littelfuse lists KLKR010.T for a manufacturer 10-piece pack; this does not establish the quantity supplied by an individual store listing.
