Littelfuse KLK025S - 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

KLK025S

Alternate Item Number: 0KLK025.TS

UPC: 079458190144

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Overview

The Littelfuse KLK025S fuse, part of the robust KLK series, is engineered to provide exceptional overcurrent protection for a wide range of sensitive electrical systems. As a fast-acting, high-interrupting capacity, current-limiting device, it is specifically designed to safeguard circuits where rapid response and superior fault current management are paramount. This fuse excels in applications characterized by low inrush currents, making it an ideal choice for control circuits, sophisticated street lighting systems, High-Intensity Discharge (HID) lighting installations, and the protection of computer equipment and other delicate electronic apparatus. The KLK025S fuse is built with Littelfuse's renowned commitment to quality and reliability. Its current-limiting design effectively reduces the magnitude and duration of fault currents, thereby minimizing damage to connected equipment and preventing cascading failures within an electrical system. The fast-acting nature ensures that it will interrupt the circuit almost instantaneously upon detecting an overcurrent condition, offering a critical layer of defense for valuable assets. This level of protection is essential in industrial and commercial settings where downtime can be extremely costly. Key applications for the Littelfuse KLK025S include: * **Control Circuits:** Protecting the intricate wiring and components of industrial control panels, automation systems, and programmable logic controllers (PLCs). * **Lighting Systems:** Ensuring the reliable operation of streetlights and HID lighting fixtures, which often involve complex ballasts and ignition sequences. * **Computer and Data Centers:** Safeguarding sensitive power supplies and electronic components within server racks and networking equipment. * **General Electronic Equipment:** Providing essential overcurrent protection for various electronic devices and appliances that do not experience significant inrush currents during startup. When selecting fuses for critical applications, engineers and technicians rely on manufacturers like Littelfuse for their proven track record in delivering high-performance protective devices. The KLK025S fuse embodies this trust, offering a dependable solution that meets stringent industry standards. Its high interrupting capacity is a crucial specification, indicating its ability to safely clear the most severe fault currents without catastrophic failure. This feature is vital for ensuring personnel safety and maintaining the integrity of electrical infrastructure. Professionals choose the KLK025S for its predictable performance, durability, and the peace of mind that comes with using a product from a leading fuse manufacturer. Its application in environments with low inrush currents ensures that nuisance tripping is minimized, while still providing robust protection against genuine overcurrent events. The Littelfuse KLK025S is more than just a fuse; it's a critical component in ensuring the safe, reliable, and efficient operation of modern electrical systems.
  • Fast-acting, current-limiting fuse for rapid overcurrent protection.
  • High interrupting capacity ensures safe clearing of severe fault currents.
  • Specifically designed for applications with low inrush currents.
  • Ideal for control circuits, street lighting, HID lighting, and computers.
  • Reliable protection from Littelfuse, a trusted leader in circuit protection.

Specifications

Application
control circuits
Brand Name
Littelfuse
Current Rating
25 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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9F61 Size B Clips 1.6in

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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.