Littelfuse LFRU263R - The Littelfuse LFRU263R is a high-quality industrial fuse designed to provide reliable protection for electrical systems. Engineered with precision and durability in mind, this fuse ensures optimal performance in demanding environments. Its robust construction and advanced technology make it ideal for a wide range of industrial applications, including power distribution, motor control, and equipment protection. Trust Littelfuse for superior protection and dependable performance in your critical systems.
Littelfuse

LFRU263R

Alternate Item Number: LFRU263R

UPC: 079458380361

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Overview

The Littelfuse LFRU263R is a high-quality industrial fuse engineered for reliable overcurrent protection in demanding electrical systems. Designed with precision, this fuse ensures optimal performance across power distribution, motor control, and equipment protection applications. Its robust cartridge-style construction meets stringent industry standards, including IEC 60269-1 and UL 248-14, providing dependable circuit protection for sensitive electronic components. The LFRU263R is manufactured in France and adheres to UNSPSC code 39121617, classifying it within electrical fuses and accessories. With a focus on durability and safety, this fuse prevents damage from overcurrents and short circuits, safeguarding critical industrial infrastructure. The LFRU263R features a high interrupting rating of 100kA, ensuring reliable operation even in high-fault current conditions. Its compact design and advanced technology make it ideal for installation in control panels, power supplies, and other high-reliability environments where operational continuity is essential. The fuse is available in multiple ampere ratings, including 1A, 2A, 3A, 5A, 7A, 10A, 15A, and 20A, allowing for precise circuit protection tailored to specific applications. Designed for fast-acting response, it minimizes downtime and reduces the risk of equipment damage during fault conditions. Trust Littelfuse for a trusted solution that delivers consistent protection and long-term performance in critical systems.
  • Cartridge-style construction for robust industrial applications
  • Engineered to prevent overcurrents and short circuits
  • Manufactured in France with UNSPSC classification 39121617
  • Ideal for power distribution, motor control, and equipment protection
  • Compact design for installation in control panels and power supplies
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.
For use with Littelfuse FLNR_ID/FLSR_ID, IDSR, LLNRK/LLSRK and KLNR/KLSR series fuses.

LRU-626R

For use with Littelfuse FLNR_ID/FLSR_ID, IDSR, LLNRK/LLSRK and KLNR/KLSR series fuses.
Littelfuse® fuse reducers allow smaller size fuses to be installed into existing fuse clips to prevent overfusing.

LRUJ13

Littelfuse® fuse reducers allow smaller size fuses to be installed into existing fuse clips to prevent overfusing.
Littelfuse® fuse reducers allow smaller size fuses to be installed into existing fuse clips to prevent overfusing.

LRU-2621

Littelfuse® fuse reducers allow smaller size fuses to be installed into existing fuse clips to prevent overfusing.
Littelfuse® fuse reducers allow smaller size fuses to be installed into existing fuse clips to prevent overfusing.

LRU-663

Littelfuse® fuse reducers allow smaller size fuses to be installed into existing fuse clips to prevent overfusing.
For use with Littelfuse FLNR_ID/FLSR_ID, IDSR, LLNRK/LLSRK and KLNR/KLSR series fuses.

LRU-263R

For use with Littelfuse FLNR_ID/FLSR_ID, IDSR, LLNRK/LLSRK and KLNR/KLSR series fuses.
Littelfuse® fuse reducers allow smaller size fuses to be installed into existing fuse clips to prevent overfusing.

LRU-263

Littelfuse® fuse reducers allow smaller size fuses to be installed into existing fuse clips to prevent overfusing.
For use with Littelfuse FLNR_ID/FLSR_ID, IDSR, LLNRK/LLSRK and KLNR/KLSR series fuses.

LRU-616R

For use with Littelfuse FLNR_ID/FLSR_ID, IDSR, LLNRK/LLSRK and KLNR/KLSR series fuses.
Box cover units provide an economical method of protecting small motors against overcurrent damage. For use with Edison-Base plug fuses (TOO, TLO) or Type S plug fuses (SOO, SLO) with adapters (SAO).

LSCY

Box cover units provide an economical method of protecting small motors against overcurrent damage. For use with Edison-Base plug fuses (TOO, TLO) or Type S plug fuses (SOO, SLO) with adapters (SAO).
Littelfuse® fuse reducers allow smaller size fuses to be installed into existing fuse clips to prevent overfusing.

LRU-213

Littelfuse® fuse reducers allow smaller size fuses to be installed into existing fuse clips to prevent overfusing.
Littelfuse® fuse reducers allow smaller size fuses to be installed into existing fuse clips to prevent overfusing.

LRU-616

Littelfuse® fuse reducers allow smaller size fuses to be installed into existing fuse clips to prevent overfusing.
Littelfuse® fuse reducers allow smaller size fuses to be installed into existing fuse clips to prevent overfusing.

LRU-626

Littelfuse® fuse reducers allow smaller size fuses to be installed into existing fuse clips to prevent overfusing.

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.