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Technical specifications, features, applications and purchasing information.
| Brand | Littelfuse |
| Model Number | KLKR-2 |
| Product Category | Class CC Fast-Acting Fuse |
| Product Series | POWR-GARD KLKR |
| Current Rating | 2 A (2000 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 Protection |
| Intended Circuit Protection | General-Purpose Branch Circuit Protection |
| Fuse Format | Class CC Rejection-Style Cartridge |
| Nominal Dimensions | 10.3 x 38.1 mm (0.41 x 1.50 in) |
The Littelfuse KLKR-2 provides a 2 ampere current rating, equivalent to 2000 milliamperes, for appropriately specified industrial electrical equipment, control circuits and branch circuit applications. Its current rating supports equipment requiring Class CC fast-acting overcurrent protection.
The KLKR series is designed for equipment requiring a fast response to overload conditions. Unlike the KLDR time-delay series, KLKR fuses provide fast-acting protection. Normal startup currents and temporary inrush conditions must be considered when selecting a fuse for a specific circuit.
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, application 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 construction helps reduce heating and magnetic effects associated with short-circuit events. The rejection feature helps prevent installation of fuses with insufficient voltage or interrupting ratings when used with compatible Class CC rejection-type fuse holders.
Features a melamine body, nickel-plated bronze end caps and a nominal 10.3 x 38.1 mm cartridge format. Littelfuse specifies a series weight of 15.42 g for the 1.5 A through 30 A ratings. Compatible mounting accessories include appropriately rated L60030C and LPSC/LFPSC Touch-Safe fuse holder series.
We support online purchase of the Littelfuse KLKR-2 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-2?
It is a 2 A Class CC fast-acting, current-limiting cartridge fuse from the Littelfuse POWR-GARD KLKR series, designed for general-purpose branch circuit protection and applications requiring fast overload response.
What is the manufacturer catalog number?
The manufacturer catalog number is KLKR002. The product marking is KLKR 2A, and Littelfuse lists KLKR002.T as the manufacturer ordering number for a 10-piece pack.
What is the current rating of KLKR-2?
The current rating is 2 amperes, equivalent to 2000 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. The DC interrupting rating is identified by Littelfuse as manufacturer self-certified.
Is KLKR-2 fast-acting or time-delay?
KLKR-2 is a fast-acting fuse. The KLKR series provides fast overload protection, whereas the KLDR series has time-delay characteristics. They should not be considered electrically identical.
Can KLKR-2 replace a KLDR-2 fuse?
Not automatically. Both products are Class CC fuses with a 2 A nominal current rating, but their operating characteristics differ. A replacement must meet the circuit requirements for inrush tolerance, overload response and fault protection.
Is KLKR-2 suitable for control transformer circuits?
Littelfuse identifies control transformer circuits among the applications of the KLKR series when fast overload response is required. Selection must account for transformer magnetizing inrush and the applicable protection requirements.
Does Littelfuse publish individual I²t and power-loss values for KLKR-2?
The KLKR datasheet revised February 25, 2025 provides numerical total clearing I²t and power-loss values for selected reference ratings but does not list separate numerical values for KLKR002.T. Values from other ampere ratings should not be substituted for the 2 A model.
What are the dimensions and construction materials?
The nominal cartridge dimensions are 10.3 mm in diameter and 38.1 mm in length. The KLKR series uses a melamine body with 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 recommended?
Littelfuse lists the L60030C and LPSC/LFPSC Touch-Safe holder series as accessories. Confirm Class CC compatibility and the required voltage and electrical ratings before installation.
Is KLKR-2 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-2?
Confirm the KLKR-2 or KLKR002 designation, 2 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 KLKR002.T for a manufacturer 10-piece pack; this does not establish the quantity supplied by an individual store listing.
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Available in stock (2000)
| Brand | Littelfuse |
| Model Number | KLKR-2 |
| Product Category | Class CC Fast-Acting Fuse |
| Product Series | POWR-GARD KLKR |
| Current Rating | 2 A (2000 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 Protection |
| Intended Circuit Protection | General-Purpose Branch Circuit Protection |
| Fuse Format | Class CC Rejection-Style Cartridge |
| Nominal Dimensions | 10.3 x 38.1 mm (0.41 x 1.50 in) |
The Littelfuse KLKR-2 provides a 2 ampere current rating, equivalent to 2000 milliamperes, for appropriately specified industrial electrical equipment, control circuits and branch circuit applications. Its current rating supports equipment requiring Class CC fast-acting overcurrent protection.
The KLKR series is designed for equipment requiring a fast response to overload conditions. Unlike the KLDR time-delay series, KLKR fuses provide fast-acting protection. Normal startup currents and temporary inrush conditions must be considered when selecting a fuse for a specific circuit.
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, application 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 construction helps reduce heating and magnetic effects associated with short-circuit events. The rejection feature helps prevent installation of fuses with insufficient voltage or interrupting ratings when used with compatible Class CC rejection-type fuse holders.
Features a melamine body, nickel-plated bronze end caps and a nominal 10.3 x 38.1 mm cartridge format. Littelfuse specifies a series weight of 15.42 g for the 1.5 A through 30 A ratings. Compatible mounting accessories include appropriately rated L60030C and LPSC/LFPSC Touch-Safe fuse holder series.
We support online purchase of the Littelfuse KLKR-2 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-2?
It is a 2 A Class CC fast-acting, current-limiting cartridge fuse from the Littelfuse POWR-GARD KLKR series, designed for general-purpose branch circuit protection and applications requiring fast overload response.
What is the manufacturer catalog number?
The manufacturer catalog number is KLKR002. The product marking is KLKR 2A, and Littelfuse lists KLKR002.T as the manufacturer ordering number for a 10-piece pack.
What is the current rating of KLKR-2?
The current rating is 2 amperes, equivalent to 2000 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. The DC interrupting rating is identified by Littelfuse as manufacturer self-certified.
Is KLKR-2 fast-acting or time-delay?
KLKR-2 is a fast-acting fuse. The KLKR series provides fast overload protection, whereas the KLDR series has time-delay characteristics. They should not be considered electrically identical.
Can KLKR-2 replace a KLDR-2 fuse?
Not automatically. Both products are Class CC fuses with a 2 A nominal current rating, but their operating characteristics differ. A replacement must meet the circuit requirements for inrush tolerance, overload response and fault protection.
Is KLKR-2 suitable for control transformer circuits?
Littelfuse identifies control transformer circuits among the applications of the KLKR series when fast overload response is required. Selection must account for transformer magnetizing inrush and the applicable protection requirements.
Does Littelfuse publish individual I²t and power-loss values for KLKR-2?
The KLKR datasheet revised February 25, 2025 provides numerical total clearing I²t and power-loss values for selected reference ratings but does not list separate numerical values for KLKR002.T. Values from other ampere ratings should not be substituted for the 2 A model.
What are the dimensions and construction materials?
The nominal cartridge dimensions are 10.3 mm in diameter and 38.1 mm in length. The KLKR series uses a melamine body with 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 recommended?
Littelfuse lists the L60030C and LPSC/LFPSC Touch-Safe holder series as accessories. Confirm Class CC compatibility and the required voltage and electrical ratings before installation.
Is KLKR-2 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-2?
Confirm the KLKR-2 or KLKR002 designation, 2 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 KLKR002.T for a manufacturer 10-piece pack; this does not establish the quantity supplied by an individual store listing.
