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Technical specifications, features, applications and purchasing information.
| Brand | Littelfuse |
| Model Number | KLKR-9 |
| Manufacturer Catalog Number | KLKR009 |
| Product Marking | KLKR 9A |
| Product Category | Class CC Fast-Acting Fuse |
| Product Series | POWR-GARD KLKR |
| Current Rating | 9 A (9000 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 (200,000 A) |
| DC Interrupting Rating | 20 kA (20,000 A, Manufacturer Self-Certified) |
| Primary Protection Function | Fast Overload and Short-Circuit Protection |
| Intended Circuit Protection | General-Purpose Branch Circuit Protection |
| Fuse Format | Class CC Rejection-Style Cartridge |
| Nominal Dimensions | 10.3 x 38.1 mm (0.406 x 1.500 in) |
The Littelfuse KLKR-9 features a 9 ampere current rating, equivalent to 9000 milliamperes. It is designed for appropriately specified industrial electrical equipment, control circuits and 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 time-delay Littelfuse KLDR series, KLKR fuses are designed for fast overload response. Expected startup currents, transient loads and inrush conditions should be evaluated when selecting a fuse.
The KLKR-9 is rated for compatible AC circuits up to 600 VAC and DC circuits up to 300 VDC. These separate voltage ratings support protective-device selection according to circuit type, operating voltage and 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. The available fault current must remain within the applicable interrupting rating.
The current-limiting design helps reduce the heating and magnetic effects associated with short-circuit events. Rejection-style construction helps prevent installation of fuses with insufficient ratings when used with compatible Class CC rejection-type fuse holders.
The fuse features a melamine body, nickel-plated bronze end caps and a nominal cartridge size of 10.3 x 38.1 mm. Its compact format supports compatible industrial panels and OEM assemblies. Confirm the fuse holder's Class CC compatibility and electrical ratings before installation.
We support online purchase of the Littelfuse KLKR-9 Class CC Fast-Acting Fuse. If you need to make bulk purchases or inquire 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-9?
The Littelfuse KLKR-9 is a 9 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 KLKR009. The product marking is KLKR 9A, and KLKR009.T is the manufacturer ordering number for a 10-piece pack.
What is the current rating?
The rated current is 9 amperes, equivalent to 9000 milliamperes.
What are the voltage ratings?
The KLKR series is rated for 600 VAC and 300 VDC. Select the appropriate 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. The manufacturer identifies the DC rating as self-certified.
Is KLKR-9 fast-acting or time-delay?
KLKR-9 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-9 replace KLDR-9?
Not automatically. Although both are Class CC fuses with a 9 A current rating, KLKR is fast-acting while KLDR is time-delay. Confirm circuit requirements, startup current, protective coordination and manufacturer recommendations before choosing a replacement.
What are the physical dimensions?
The nominal cartridge dimensions are 10.3 mm in diameter and 38.1 mm in length, approximately 0.406 x 1.500 inches. Confirm that the existing fuse holder supports the Class CC format and required electrical ratings.
Which equipment can use KLKR-9?
The KLKR series is intended for general-purpose branch circuit protection and is commonly specified for compatible OEM equipment, industrial control panels and electronic circuits requiring fast-acting protection. Confirm that the 9 A rating meets the equipment and circuit requirements.
Does the manufacturer publish a specific I²t value for KLKR-9?
The Littelfuse KLKR datasheet provides numerical total clearing I²t values for selected current ratings but does not list a separate numerical value for KLKR009.T in its electrical specifications table. Values from other current ratings should not be substituted for the 9 A model.
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 Littelfuse datasheet identifies UL Listing under file E81895 and CSA Certification under file LR29862. The series documentation also identifies RoHS compliance and Declaration of Conformity KLKR_210128_1.
What should be checked before ordering KLKR-9?
Confirm the KLKR-9 model designation, manufacturer catalog number KLKR009, 9 A current rating, 600 VAC or 300 VDC circuit requirement, fast-acting characteristic, interrupting capacity, compatible Class CC fuse holder and required pack quantity. KLKR009.T is the manufacturer's 10-piece ordering number; confirm the actual selling quantity separately.
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| Brand | Littelfuse |
| Model Number | KLKR-9 |
| Manufacturer Catalog Number | KLKR009 |
| Product Marking | KLKR 9A |
| Product Category | Class CC Fast-Acting Fuse |
| Product Series | POWR-GARD KLKR |
| Current Rating | 9 A (9000 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 (200,000 A) |
| DC Interrupting Rating | 20 kA (20,000 A, Manufacturer Self-Certified) |
| Primary Protection Function | Fast Overload and Short-Circuit Protection |
| Intended Circuit Protection | General-Purpose Branch Circuit Protection |
| Fuse Format | Class CC Rejection-Style Cartridge |
| Nominal Dimensions | 10.3 x 38.1 mm (0.406 x 1.500 in) |
The Littelfuse KLKR-9 features a 9 ampere current rating, equivalent to 9000 milliamperes. It is designed for appropriately specified industrial electrical equipment, control circuits and 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 time-delay Littelfuse KLDR series, KLKR fuses are designed for fast overload response. Expected startup currents, transient loads and inrush conditions should be evaluated when selecting a fuse.
The KLKR-9 is rated for compatible AC circuits up to 600 VAC and DC circuits up to 300 VDC. These separate voltage ratings support protective-device selection according to circuit type, operating voltage and 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. The available fault current must remain within the applicable interrupting rating.
The current-limiting design helps reduce the heating and magnetic effects associated with short-circuit events. Rejection-style construction helps prevent installation of fuses with insufficient ratings when used with compatible Class CC rejection-type fuse holders.
The fuse features a melamine body, nickel-plated bronze end caps and a nominal cartridge size of 10.3 x 38.1 mm. Its compact format supports compatible industrial panels and OEM assemblies. Confirm the fuse holder's Class CC compatibility and electrical ratings before installation.
We support online purchase of the Littelfuse KLKR-9 Class CC Fast-Acting Fuse. If you need to make bulk purchases or inquire 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-9?
The Littelfuse KLKR-9 is a 9 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 KLKR009. The product marking is KLKR 9A, and KLKR009.T is the manufacturer ordering number for a 10-piece pack.
What is the current rating?
The rated current is 9 amperes, equivalent to 9000 milliamperes.
What are the voltage ratings?
The KLKR series is rated for 600 VAC and 300 VDC. Select the appropriate 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. The manufacturer identifies the DC rating as self-certified.
Is KLKR-9 fast-acting or time-delay?
KLKR-9 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-9 replace KLDR-9?
Not automatically. Although both are Class CC fuses with a 9 A current rating, KLKR is fast-acting while KLDR is time-delay. Confirm circuit requirements, startup current, protective coordination and manufacturer recommendations before choosing a replacement.
What are the physical dimensions?
The nominal cartridge dimensions are 10.3 mm in diameter and 38.1 mm in length, approximately 0.406 x 1.500 inches. Confirm that the existing fuse holder supports the Class CC format and required electrical ratings.
Which equipment can use KLKR-9?
The KLKR series is intended for general-purpose branch circuit protection and is commonly specified for compatible OEM equipment, industrial control panels and electronic circuits requiring fast-acting protection. Confirm that the 9 A rating meets the equipment and circuit requirements.
Does the manufacturer publish a specific I²t value for KLKR-9?
The Littelfuse KLKR datasheet provides numerical total clearing I²t values for selected current ratings but does not list a separate numerical value for KLKR009.T in its electrical specifications table. Values from other current ratings should not be substituted for the 9 A model.
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 Littelfuse datasheet identifies UL Listing under file E81895 and CSA Certification under file LR29862. The series documentation also identifies RoHS compliance and Declaration of Conformity KLKR_210128_1.
What should be checked before ordering KLKR-9?
Confirm the KLKR-9 model designation, manufacturer catalog number KLKR009, 9 A current rating, 600 VAC or 300 VDC circuit requirement, fast-acting characteristic, interrupting capacity, compatible Class CC fuse holder and required pack quantity. KLKR009.T is the manufacturer's 10-piece ordering number; confirm the actual selling quantity separately.
