Littelfuse KLK009S - 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

KLK009S

Alternate Item Number: 0KLK009.TS

UPC: 079458943368

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Minimum Qty: 10

Multiplier: 10

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Overview

The **Littelfuse KLK009S** is a **fast-acting, high-interrupting capacity, current-limiting fuse** engineered for precision protection in critical industrial and commercial applications. Designed to safeguard sensitive control circuits, street lighting systems, high-intensity discharge (H.I.D.) lighting, computers, and other low-inrush environments, this fuse delivers unmatched reliability where rapid fault clearance is essential. As part of Littelfuse’s industry-leading circuit protection portfolio, the KLK009S combines **superior interrupting ratings** with **fast response times**, ensuring minimal downtime and maximum operational safety in demanding installations. **Key Features and Benefits:** - **Fast-Acting Response:** The KLK009S is optimized for applications where **instantaneous fault interruption** is critical, preventing damage to downstream equipment and reducing the risk of electrical fires. Its current-limiting design ensures that fault currents are interrupted before they reach damaging levels, protecting sensitive electronics and control systems. - **High Interrupting Capacity:** With a robust interrupting rating, this fuse can safely handle **high fault currents** without compromising performance, making it ideal for both low- and medium-voltage systems. This capability is particularly valuable in **street lighting networks, H.I.D. lighting arrays, and industrial control panels**, where reliable fault interruption is non-negotiable. - **Current-Limiting Technology:** By limiting the let-through current during a fault, the KLK009S minimizes stress on connected components, extending their operational lifespan. This feature is especially beneficial in **commercial buildings, data centers, and automation systems**, where equipment longevity and uptime are top priorities. - **Versatile Applications:** The KLK009S excels in environments where **low inrush currents** are typical, such as **control circuits, signaling systems, and LED lighting fixtures**. Its compatibility with a wide range of voltages and configurations makes it a go-to solution for engineers and technicians seeking a **universal fuse** for diverse protection needs. - **Durable and Reliable Construction:** Built to withstand harsh conditions, the KLK009S features a **rugged design** that resists vibration, temperature fluctuations, and electrical stress. This durability ensures consistent performance in **outdoor installations, industrial facilities, and commercial infrastructures**, where environmental factors can impact component reliability. **Industry Applications and Use Cases:** The KLK009S is a trusted choice across multiple sectors, including **municipal street lighting, telecommunications infrastructure, HVAC systems, and renewable energy installations**. In **control panels for machinery**, it provides a critical layer of protection against short circuits and overloads, while in **H.I.D. lighting systems** (such as stadium or parking lot fixtures), it ensures stable operation even in high-temperature environments. For **computer and server applications**, the fuse’s fast-acting nature safeguards against transient surges that could corrupt data or damage hardware. **Selection and Installation Best Practices:** When choosing the KLK009S, professionals should consider the **system voltage, expected fault current, and load characteristics** to ensure optimal compatibility. Littelfuse provides comprehensive datasheets and application notes to guide engineers in selecting the correct fuse rating and type for their specific needs. Installation should follow **industry standards (e.g., NEC, IEC)** and manufacturer guidelines, with attention to proper mounting, clearance, and labeling to maintain safety and compliance. **Why Choose Littelfuse?** As a **global leader in circuit protection**, Littelfuse has delivered innovative solutions for over a century, earning the trust of industries worldwide. The KLK009S reflects the company’s commitment to **quality, performance, and reliability**, backed by rigorous testing and adherence to international standards. Whether for a small-scale lighting project or a large industrial installation, the KLK009S represents a **cost-effective, high-performance choice** for professionals who demand the best in circuit protection. Trust Littelfuse to keep your systems safe, efficient, and operational—today and for years to come.
  • Fast-acting response for instantaneous fault interruption
  • High interrupting capacity for safe handling of fault currents
  • Current-limiting technology to protect sensitive equipment
  • Versatile for control circuits, street lighting, H.I.D. lighting, and computers
  • Durable construction for harsh industrial and outdoor environments

Specifications

Application
control circuits
Brand Name
Littelfuse
Interrupt Rating
100;50 kA;kA
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 Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
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
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.