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Technical specifications, features, applications and purchasing information.
| Brand | Littelfuse |
| Model Number | KLKR-30 |
| Product Category | Class CC Fast-Acting Fuse |
| Product Series | POWR-GARD KLKR |
| Current Rating | 30 A (30000 mA) |
| AC Voltage Rating | 600 VAC |
| DC Voltage Rating | 300 VDC |
| Fuse Class | UL Class CC |
| Operating Characteristic | Fast-Acting (Fast-Blow) |
| Fuse Type | Current-Limiting Cartridge Fuse |
| AC Interrupting Rating | 200 kA RMS Symmetrical (200000 A) |
| DC Interrupting Rating | 20 kA (20000 A, Manufacturer Self-Certified) |
| Total Clearing I²t | 1720 A²s at 200 kA Test Condition |
| Power Loss at 100% Rated Current | 3.75 W |
| Power Loss at 80% Rated Current | 2.10 W |
The Littelfuse KLKR-30 provides a 30 ampere current rating, equivalent to 30000 milliamperes. It is designed for appropriately rated industrial electrical equipment, control panels and branch circuits requiring Class CC fast-acting overcurrent protection. Verify the circuit design current and protective coordination before selecting the fuse.
The KLKR series provides fast-acting protection for circuits requiring a rapid response to overload conditions. Its operating characteristics differ from those of the time-delay Littelfuse KLDR series. Evaluate equipment startup current, temporary overloads and inrush conditions to ensure the fuse is suitable for the application.
The KLKR-30 is rated for compatible AC circuits up to 600 VAC and DC circuits up to 300 VDC. These separate ratings support selection for appropriate electrical installations. The operating voltage, circuit configuration and available prospective fault current must remain within the applicable limits.
The KLKR series provides an AC interrupting rating of 200 kA RMS symmetrical and a DC interrupting rating of 20 kA. Littelfuse identifies the DC rating as manufacturer self-certified. Confirm that the available fault current does not exceed the applicable interrupting rating for the circuit.
The current-limiting design helps reduce the heating and magnetic effects associated with short-circuit currents. The rejection feature helps prevent the use of inadequately rated fuses when installed with compatible Class CC rejection-type fuse holders.
Littelfuse specifies a total clearing I²t of 1720 A²s at the 200 kA test condition, power loss of 3.75 W at 100% rated current and 2.10 W at 80% rated current for KLKR030.T. The fuse has a melamine body, nickel-plated bronze end caps and a nominal 10.3 x 38.1 mm cartridge format.
We support online purchase of the Littelfuse KLKR-30 Class CC Fast-Acting Fuse. For bulk purchases or inquiries about other products, please contact our team with your purchase requirements. We can provide information regarding quantity quotations, delivery arrangements and transportation methods. Please verify the exact model, current rating, electrical specifications and required purchase quantity before ordering.
What is the Littelfuse KLKR-30?
The Littelfuse KLKR-30 is a 30 A Class CC fast-acting, current-limiting cartridge fuse in the POWR-GARD KLKR series. It is intended for general-purpose branch circuit protection and compatible industrial equipment requiring fast overload response.
What is the manufacturer catalog number?
The manufacturer catalog number is KLKR030. The product marking is KLKR 30A, and KLKR030.T is the manufacturer's ordering number for a 10-piece pack.
What is the current rating?
The rated current is 30 amperes, equivalent to 30000 milliamperes.
What are the AC and DC voltage ratings?
The KLKR series is rated for 600 VAC and 300 VDC. Choose the applicable rating according to the circuit type and operating voltage.
What are the interrupting ratings?
The series has an AC interrupting rating of 200 kA RMS symmetrical and a DC interrupting rating of 20 kA. Littelfuse identifies the DC rating as manufacturer self-certified.
What is the total clearing I²t value?
The manufacturer datasheet specifies a total clearing I²t of 1720 A²s for KLKR030.T under the 200 kA test condition. This value is specific to the 30 A model and should not be replaced with data from another current rating.
What is the power loss at rated current?
Littelfuse specifies a power loss of 3.75 W at 100% rated current and 2.10 W at 80% rated current for KLKR030.T. These values can help evaluate operating heat dissipation when selecting a compatible fuse holder and designing an electrical panel.
Is KLKR-30 fast-acting or time-delay?
KLKR-30 is a fast-acting fuse. The KLDR series has time-delay characteristics, so the two series should not be treated as interchangeable solely because their current ratings match.
Can KLKR-30 replace KLDR-30?
Not automatically. Although both are Class CC fuses rated at 30 A, KLKR is fast-acting while KLDR is time-delay. Confirm circuit requirements, startup current, protective coordination and manufacturer recommendations before selecting a replacement.
What are the physical dimensions and construction materials?
The nominal cartridge dimensions are 10.3 mm in diameter and 38.1 mm in length, approximately 0.406 x 1.500 inches. The KLKR series uses a melamine body and nickel-plated bronze end caps. Littelfuse specifies a series weight of 15.42 g for ratings from 1.5 A through 30 A.
Which fuse holders are compatible?
Littelfuse lists the L60030C and LPSC/LFPSC Touch-Safe holder series as accessories. Verify Class CC compatibility, operating voltage, interrupting capacity and the requirements of the electrical installation before use.
Does the KLKR series have UL and CSA certifications?
The manufacturer datasheet identifies UL Listing under file E81895 and CSA Certification under file LR29862. The series documentation also identifies CE conformity documentation and RoHS compliance. The DC interrupting rating is separately manufacturer self-certified.
What should be checked before ordering KLKR-30?
Confirm the KLKR-30 model designation, manufacturer catalog number KLKR030, 30 A current rating, applicable 600 VAC or 300 VDC circuit requirement, fast-acting characteristic, interrupting capacity, compatible Class CC fuse holder and required pack quantity. KLKR030.T is the manufacturer's 10-piece ordering number; verify the quantity supplied by the individual seller separately.
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| Brand | Littelfuse |
| Model Number | KLKR-30 |
| Product Category | Class CC Fast-Acting Fuse |
| Product Series | POWR-GARD KLKR |
| Current Rating | 30 A (30000 mA) |
| AC Voltage Rating | 600 VAC |
| DC Voltage Rating | 300 VDC |
| Fuse Class | UL Class CC |
| Operating Characteristic | Fast-Acting (Fast-Blow) |
| Fuse Type | Current-Limiting Cartridge Fuse |
| AC Interrupting Rating | 200 kA RMS Symmetrical (200000 A) |
| DC Interrupting Rating | 20 kA (20000 A, Manufacturer Self-Certified) |
| Total Clearing I²t | 1720 A²s at 200 kA Test Condition |
| Power Loss at 100% Rated Current | 3.75 W |
| Power Loss at 80% Rated Current | 2.10 W |
The Littelfuse KLKR-30 provides a 30 ampere current rating, equivalent to 30000 milliamperes. It is designed for appropriately rated industrial electrical equipment, control panels and branch circuits requiring Class CC fast-acting overcurrent protection. Verify the circuit design current and protective coordination before selecting the fuse.
The KLKR series provides fast-acting protection for circuits requiring a rapid response to overload conditions. Its operating characteristics differ from those of the time-delay Littelfuse KLDR series. Evaluate equipment startup current, temporary overloads and inrush conditions to ensure the fuse is suitable for the application.
The KLKR-30 is rated for compatible AC circuits up to 600 VAC and DC circuits up to 300 VDC. These separate ratings support selection for appropriate electrical installations. The operating voltage, circuit configuration and available prospective fault current must remain within the applicable limits.
The KLKR series provides an AC interrupting rating of 200 kA RMS symmetrical and a DC interrupting rating of 20 kA. Littelfuse identifies the DC rating as manufacturer self-certified. Confirm that the available fault current does not exceed the applicable interrupting rating for the circuit.
The current-limiting design helps reduce the heating and magnetic effects associated with short-circuit currents. The rejection feature helps prevent the use of inadequately rated fuses when installed with compatible Class CC rejection-type fuse holders.
Littelfuse specifies a total clearing I²t of 1720 A²s at the 200 kA test condition, power loss of 3.75 W at 100% rated current and 2.10 W at 80% rated current for KLKR030.T. The fuse has a melamine body, nickel-plated bronze end caps and a nominal 10.3 x 38.1 mm cartridge format.
We support online purchase of the Littelfuse KLKR-30 Class CC Fast-Acting Fuse. For bulk purchases or inquiries about other products, please contact our team with your purchase requirements. We can provide information regarding quantity quotations, delivery arrangements and transportation methods. Please verify the exact model, current rating, electrical specifications and required purchase quantity before ordering.
What is the Littelfuse KLKR-30?
The Littelfuse KLKR-30 is a 30 A Class CC fast-acting, current-limiting cartridge fuse in the POWR-GARD KLKR series. It is intended for general-purpose branch circuit protection and compatible industrial equipment requiring fast overload response.
What is the manufacturer catalog number?
The manufacturer catalog number is KLKR030. The product marking is KLKR 30A, and KLKR030.T is the manufacturer's ordering number for a 10-piece pack.
What is the current rating?
The rated current is 30 amperes, equivalent to 30000 milliamperes.
What are the AC and DC voltage ratings?
The KLKR series is rated for 600 VAC and 300 VDC. Choose the applicable rating according to the circuit type and operating voltage.
What are the interrupting ratings?
The series has an AC interrupting rating of 200 kA RMS symmetrical and a DC interrupting rating of 20 kA. Littelfuse identifies the DC rating as manufacturer self-certified.
What is the total clearing I²t value?
The manufacturer datasheet specifies a total clearing I²t of 1720 A²s for KLKR030.T under the 200 kA test condition. This value is specific to the 30 A model and should not be replaced with data from another current rating.
What is the power loss at rated current?
Littelfuse specifies a power loss of 3.75 W at 100% rated current and 2.10 W at 80% rated current for KLKR030.T. These values can help evaluate operating heat dissipation when selecting a compatible fuse holder and designing an electrical panel.
Is KLKR-30 fast-acting or time-delay?
KLKR-30 is a fast-acting fuse. The KLDR series has time-delay characteristics, so the two series should not be treated as interchangeable solely because their current ratings match.
Can KLKR-30 replace KLDR-30?
Not automatically. Although both are Class CC fuses rated at 30 A, KLKR is fast-acting while KLDR is time-delay. Confirm circuit requirements, startup current, protective coordination and manufacturer recommendations before selecting a replacement.
What are the physical dimensions and construction materials?
The nominal cartridge dimensions are 10.3 mm in diameter and 38.1 mm in length, approximately 0.406 x 1.500 inches. The KLKR series uses a melamine body and nickel-plated bronze end caps. Littelfuse specifies a series weight of 15.42 g for ratings from 1.5 A through 30 A.
Which fuse holders are compatible?
Littelfuse lists the L60030C and LPSC/LFPSC Touch-Safe holder series as accessories. Verify Class CC compatibility, operating voltage, interrupting capacity and the requirements of the electrical installation before use.
Does the KLKR series have UL and CSA certifications?
The manufacturer datasheet identifies UL Listing under file E81895 and CSA Certification under file LR29862. The series documentation also identifies CE conformity documentation and RoHS compliance. The DC interrupting rating is separately manufacturer self-certified.
What should be checked before ordering KLKR-30?
Confirm the KLKR-30 model designation, manufacturer catalog number KLKR030, 30 A current rating, applicable 600 VAC or 300 VDC circuit requirement, fast-acting characteristic, interrupting capacity, compatible Class CC fuse holder and required pack quantity. KLKR030.T is the manufacturer's 10-piece ordering number; verify the quantity supplied by the individual seller separately.
