Littelfuse KLK020H - Fast-acting, high-interrupting capacity, current-limiting type fuse. Especially suited for control circuits, street lighting, H.I.D. lighting, computers, and other applications without high inrush currents.
Littelfuse

KLK020H

Alternate Item Number: 0KLK020.H

UPC: 079458945997


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Overview

The Littelfuse KLK020H fuse, SKU KLK020H, is a high-performance, fast-acting, current-limiting device engineered to provide superior overcurrent protection for a wide range of sensitive electrical systems. Designed with a robust interrupting capacity, this fuse is specifically optimized for applications that do not experience significant inrush currents, making it an ideal choice for control circuits, street lighting systems, High-Intensity Discharge (HID) lighting, and computer power supplies. Its precise current-limiting characteristics ensure that fault currents are rapidly interrupted, thereby minimizing damage to connected equipment and preventing cascading failures within the electrical network. Manufactured by Littelfuse, a globally recognized leader in circuit protection, the KLK020H fuse embodies the company's commitment to quality, reliability, and innovation. The KLK series is known for its consistent performance and durability, even in demanding industrial and commercial environments. This particular model, rated at 20 Amperes, offers a critical layer of defense against short circuits and overloads, safeguarding valuable assets and ensuring operational continuity. Its fast-acting nature is crucial for protecting delicate electronic components that are susceptible to rapid current surges. Key applications for the Littelfuse KLK020H fuse include: * **Control Circuits:** Protecting sensitive control logic and instrumentation from damaging overcurrents. * **Street Lighting:** Ensuring the reliable operation of street lighting systems by safeguarding ballasts and control gear. * **H.I.D. Lighting:** Providing essential protection for High-Intensity Discharge lighting fixtures, which often utilize sensitive electronic components. * **Computer Power Supplies:** Offering a vital safety measure for the power input stages of computers and other electronic devices. * **General Industrial Equipment:** Suitable for various industrial machinery and equipment where fast-acting, current-limiting protection is required without high inrush current considerations. The current-limiting design of the KLK020H is a significant advantage, as it actively restricts the magnitude and duration of fault currents. This feature is paramount in preventing arc flash hazards and reducing the overall energy let-through during a fault event. Engineers and technicians rely on fuses like the KLK020H for their predictable performance and ease of integration into existing electrical panels and systems. The UNSPSC code 39121609 categorizes this product within the fuse and circuit breaker components sector, highlighting its essential role in electrical infrastructure. Choosing the Littelfuse KLK020H means investing in dependable circuit protection that upholds the integrity and longevity of your electrical installations.
  • Fast-acting, current-limiting fuse for rapid overcurrent protection.
  • High interrupting capacity to safely manage fault currents.
  • Specifically designed for applications without high inrush currents.
  • Ideal for control circuits, street lighting, H.I.D. lighting, and computers.
  • Manufactured by Littelfuse, a trusted leader in circuit protection.

Specifications

Application
control circuits
Brand Name
Littelfuse
Current Rating
20 A
Interrupt Rating
100;50 kA;kA
Series
KLK
Special Features
RoHS
Sub Brand
KLK Series
Type
Fast-Acting
Voltage Rating
600 VAC
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Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

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Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8

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9F61 Size B Clips 1.6in

9F61BWW460

9F61 Size B Clips 1.6in
POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.

LCC5

POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.

Frequently Asked Questions about Littelfuse

What certifications and standards do Littelfuse products comply with?

Littelfuse products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Customers can verify specific product certifications by consulting individual product datasheets on Littelfuse.com, which provide comprehensive details about standards compliance for each component.

What industries and applications are Littelfuse products used for?

Littelfuse products are critical for electrical protection and safety across multiple industrial sectors, including manufacturing, automation, power distribution, and electrical control systems. Their comprehensive product portfolio serves industries that require robust electrical protection, including motor and pump applications, solar installations, programmable logic controllers (PLCs), electrical switch panels, and critical infrastructure environments. Key product lines protect against overcurrent, voltage transients, ground faults, and temperature-related electrical risks, ensuring equipment safety and operational reliability.

What technical support does Littelfuse offer?

Littelfuse offers comprehensive technical support through multiple channels. Their Technical Hotline (800-TEC-FUSE) provides direct access to engineers who can help identify issues and recommend solutions. Additionally, Littelfuse offers extensive online Technical Resources at Littelfuse.com, including datasheets, product manuals, whitepapers, application guides, and online design tools. Their experienced product and application engineers also provide step-by-step support from design to installation.

What are the main product lines offered by Littelfuse?

Littelfuse offers comprehensive industrial protection and control product lines, including fuses, fuse holders, protection relays, temperature sensors, and electrical safety components. Their key product categories span surge protective devices, custom OEM products, electrical switch panels, medium voltage fuses, ground-fault protection relays, motor and pump protection devices, and temperature sensors. These products are designed to minimize electrical safety hazards, limit equipment damage, improve productivity, and safeguard personnel from electrical faults.

What are the key features of Littelfuse products?

Littelfuse products feature exceptional circuit protection technologies with key characteristics including UL/IEC safety standard compliance, low internal resistance, and advanced protective capabilities across multiple product lines. Their components provide critical protection for industrial systems, offering features like overcurrent protection, voltage transient suppression, and resettable protection devices with ultra-low resistance and compact designs. Key product lines include fuses, metal oxide varistors (MOVs), TVS diodes, PolySwitch devices, and specialized electronic protection components that enhance system reliability and safety.

What environmental ratings do Littelfuse products have?

Littelfuse products feature comprehensive environmental ratings, including NEMA Type 1, 2, 3, 3R, 4/4X, 12, and 13 certifications, as well as IP65 protection. These ratings ensure superior protection in diverse industrial environments, with an operating temperature range of -40°F to +131°F (-40°C to +55°C). Many products also include UV-stabilized materials and neoprene gaskets for enhanced durability in outdoor and challenging conditions.

What accessories are available for Littelfuse products?

Littelfuse offers several key accessories across their product lines, including fuse holders, voltage monitoring modules, and terminal connectors. Specific accessories include the LPSM003ZXID (indicating) and LPSM003Z (non-indicating) POWR-SAFE Dead Front fuse holders for Class CC and Midget-Style fuses, the VRM6048 voltage monitor accessory module, and female quick connect terminals (P1015 series) in various wire gauge sizes. These accessories are designed to enhance protection, monitoring, and connectivity for Littelfuse electrical components.

What is Littelfuse's warranty policy?

Littelfuse provides comprehensive warranty details on their official website at www.littelfuse.com/warranty. Customers should visit this page to review the specific warranty terms and conditions for their specific product lines. For direct warranty support or questions, customers can contact Littelfuse Technical Support at 1-800-TEC-FUSE or email [email protected].

What communication protocols do Littelfuse products support?

Littelfuse supports a comprehensive range of industrial communication protocols, including PROFIBUS, PROFINET, EtherNet/IP, DeviceNet, Modbus RTU, and CANopen. Our products provide flexible connectivity solutions across multiple industrial automation platforms, enabling seamless integration with various control systems and network architectures.

How are Littelfuse products typically installed?

Littelfuse products are typically installed using specialized mounting hardware like fuse holders, blocks, and panels designed for specific industrial applications. The POWR-SAFE Dead Front holders, for example, provide optimum protection for Class CC and Midget-Style fuses, supporting installations up to 600 VAC/DC. Installation often involves using precision terminals with strain relief, such as 0.25 in. female quick connect terminals, to ensure secure and safe electrical connections in industrial control systems.