Littelfuse LRU-2642R - For use with Littelfuse FLNR_ID/FLSR_ID, IDSR, LLNRK/LLSRK and KLNR/KLSR series fuses.
Littelfuse

LRU-2642R

Alternate Item Number: LRU2642R

UPC: 079458010725


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BrochureTechnical BulletinSpecification Sheet

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Overview

The Littelfuse LRU-2642R fuse holder, identified by SKU LRU-2642R, is a specialized component engineered for seamless integration with specific Littelfuse fuse series. This industrial-grade solution is designed for optimal performance and reliability when used in conjunction with Littelfuse FLNR_ID/FLSR_ID, IDSR, LLNRK/LLSRK, and KLNR/KLSR series fuses. The LRU-2642R facilitates secure and dependable connections, crucial for maintaining efficient system operation and ensuring consistent circuit protection in demanding environments. Its robust construction makes it suitable for a wide range of applications, including power distribution systems, industrial machinery, and other critical infrastructure where uninterrupted and reliable operation is essential. Manufactured in the United States, the LRU-2642R embodies Littelfuse's commitment to producing durable and precisely engineered products, reinforcing its position as a leading provider of circuit protection solutions. The Universal Standard Products and Services Classification (UNSPSC) code for this product is 39121617.
  • Designed for Littelfuse FLNR_ID/FLSR_ID, IDSR, LLNRK/LLSRK, and KLNR/KLSR series fuses.
  • Industrial-grade reliability for demanding applications.
  • Ensures secure connections and efficient operation.
  • Suitable for power distribution and industrial machinery.
  • Manufactured in the US by Littelfuse.

Specifications

Application
Industrial
Brand Name
Littelfuse
Special Features
Simple Installation
Standard
UL Listed CSA Certified
Sub Brand
LRUR Series
Type
Fuse Reducer
Ferraz Shawmut Nylon Fuse Pullers are fully insulated, made of high-dielectric, high impact nylon with no-slip handles and protective finger stops for greater safety when inserting fuses. Yellow color for safety. 600 Volts 600 Amps large size series.

34-003G

Ferraz Shawmut Nylon Fuse Pullers are fully insulated, made of high-dielectric, high impact nylon with no-slip handles and protective finger stops for greater safety when inserting fuses. Yellow color for safety. 600 Volts 600 Amps large size series.
For use with Littelfuse FLNR_ID/FLSR_ID, IDSR, LLNRK/LLSRK and KLNR/KLSR series fuses.

LRU-2661R

For use with Littelfuse FLNR_ID/FLSR_ID, IDSR, LLNRK/LLSRK and KLNR/KLSR series fuses.
Fuse Package, Includes 18 Amp Fuse, Probe Wrench, Hex Wrench, Chemlok 205 Adhesive, Label, Instruction Sheet. Overall Length 6.38 inch, Diameter 1.75 inch.

166PF8-18

Fuse Package, Includes 18 Amp Fuse, Probe Wrench, Hex Wrench, Chemlok 205 Adhesive, Label, Instruction Sheet. Overall Length 6.38 inch, Diameter 1.75 inch.

Frequently Asked Questions

How can I get technical support for Littelfuse products?

Technical support is available through Littelfuse Techline for fuse and relay products. They offer product cross references, technical information, and application assistance.

What information can Littelfuse Techline provide?

Littelfuse Techline provides product cross references, general technical information, engineering drawings, and application assistance for fuse and relay products.

What are the benefits of the Littelfuse MROplus program?

The Littelfuse MROplus™ program helps manufacturing facilities lower costs, increase plant safety, decrease downtime, and reduce inventory.

How does the Littelfuse Stock Check Program work?

The Stock Check Program allows Littelfuse distributors to display their inventory levels on Littelfuse.com, driving new customers to their websites. It provides free listings.

What activities are covered by the Promotional Allowance Program?

The Promotional Allowance Program covers demand generation campaigns, sales incentives, joint email campaigns, and brand awareness activities like trade shows and advertising. All activities require pre-approval.

What services are available through Littelfuse Business Center?

The Littelfuse Business Center allows users to check product availability, pricing, place orders, view order status, manage SPAs, order literature, and access technical resources.

How can I contact Littelfuse technical support?

You can contact Littelfuse technical support by calling +1-800-TEC-FUSE (800-832-3873) in the US & Canada, or by emailing [email protected].

What is the contact information for Littelfuse customer service?

For customer service in the US & Canada, call +1-800-227-0029 or email [email protected].

What are the voltage and current ratings for 10x38mm fuses?

10x38mm fuses are available with ratings from 125 to 1000 volts and 1/10 to 30 amperes. They come in time-delay, fast-acting, board mount, or solar versions.

What UL standards do Industrial Shock-Block GFCIs meet?

Industrial Shock-Block GFCIs meet UL Standard 943C Class C and Class D. They are designed for people protection in industrial facilities.

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.