Littelfuse KLK007S - 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

KLK007S

Alternate Item Number: 0KLK007.TS

UPC: 079458943351

Documents & Media
BrochureTechnical BulletinTechnical DrawingSpecification Sheet

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Overview

The **Littelfuse KLK007S** is a **fast-acting, high-interrupting capacity current-limiting fuse** engineered for precision protection in critical control circuits, street lighting, H.I.D. lighting, computers, and other applications with low inrush currents. Designed to meet the demands of industrial and commercial environments, this fuse delivers **reliable, high-performance circuit protection** where fast response times and durability are essential. **Key Features and Benefits:** - **Fast-Acting Response:** The KLK007S fuse interrupts fault currents rapidly, minimizing damage to sensitive equipment and reducing downtime in critical systems. This is particularly vital in control circuits where even minor disruptions can lead to costly operational delays. - **High Interrupting Capacity:** With a robust interrupting rating, this fuse can safely handle high fault currents, ensuring reliable protection in demanding applications. It is ideal for environments where electrical faults are a persistent risk, such as industrial control panels, lighting systems, and computer networks. - **Current-Limiting Design:** The fuse’s current-limiting technology restricts fault current to safe levels, protecting downstream components from thermal and mechanical stress. This feature is especially beneficial in applications with sensitive electronics, where overcurrent conditions can cause irreversible damage. - **Versatile Applications:** The KLK007S is specifically suited for **control circuits, street lighting, H.I.D. lighting, computers, and other low-inrush applications**. Its design ensures compatibility with a wide range of electrical systems, making it a versatile choice for engineers and technicians. - **Durable and Reliable:** Built to withstand harsh operating conditions, the KLK007S fuse offers long-term reliability, reducing the need for frequent replacements and maintenance. Its robust construction ensures consistent performance even in challenging environments. **Industry Applications and Use Cases:** The KLK007S fuse is widely used in **industrial automation, commercial lighting, telecommunications, and data centers**, where reliable circuit protection is non-negotiable. In **control circuits**, it safeguards PLCs, relays, and other control devices from overcurrent events. For **street and H.I.D. lighting systems**, it ensures uninterrupted operation by quickly isolating faults, reducing maintenance costs and improving public safety. In **computer and IT infrastructure**, the fuse protects power supplies and sensitive electronics from transient overcurrents, extending equipment lifespan. **Selection and Installation Considerations:** When selecting a fuse for your application, consider the **fault current rating, response time, and environmental conditions**. The KLK007S is designed for applications with **low inrush currents**, making it unsuitable for high-startup loads like motors or transformers. Proper installation involves ensuring correct sizing, secure mounting, and adherence to electrical codes. Littelfuse provides comprehensive technical documentation and support to assist engineers in selecting the right fuse for their specific needs. **Why Choose Littelfuse?** As a **global leader in circuit protection solutions**, Littelfuse has been delivering innovative and reliable products for over a century. The company’s commitment to quality, safety, and performance has made it a trusted partner for industries worldwide. With a reputation for engineering excellence and a comprehensive portfolio of fuses, circuit breakers, and other protection devices, Littelfuse ensures that professionals can depend on their solutions to safeguard critical systems. The KLK007S fuse exemplifies this dedication, providing **unmatched reliability and protection** for a wide range of applications. For engineers, electricians, and facility managers seeking a **high-performance, fast-acting fuse** for control circuits and lighting applications, the **Littelfuse KLK007S** is the ideal choice. Its combination of **speed, durability, and versatility** makes it a cornerstone component in modern electrical protection strategies.
  • Fast-acting response for rapid fault current interruption
  • High interrupting capacity for reliable protection in demanding applications
  • Current-limiting design restricts fault currents to safe levels
  • Ideal for control circuits, street lighting, H.I.D. lighting, and computers
  • Durable construction ensures long-term reliability and reduced maintenance

Specifications

Application
control circuits
Brand Name
Littelfuse
Interrupt Rating
100;50 kA;kA
Series
KLK
Special Features
RoHS
Sub Brand
KLK Series
Type
Fast-Acting
Voltage Rating
600 VAC
Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount

GPM-SRR90

Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount
Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20

C331156

Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20
Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8

1SCM8

Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8
Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
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.
9F61 Size B Clips 1.6in

9F61BWW460

9F61 Size B Clips 1.6in

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.