Littelfuse LRU-2664 - Littelfuse® fuse reducers allow smaller size fuses to be installed into existing fuse clips to prevent overfusing.
Littelfuse

LRU-2664

Alternate Item Number: LRU2664

UPC: 079458114102


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Overview

The Littelfuse LRU-2664 fuse reducer is a critical component for maintaining optimal electrical system safety and functionality in industrial, commercial, and automotive environments. This expertly engineered device addresses a common challenge: the need to install smaller-rated fuses into existing, larger fuse clips without compromising circuit protection. By utilizing the LRU-2664, engineers and technicians can effectively prevent overfusing, a dangerous condition that can lead to equipment damage, fire hazards, and system downtime. Designed with precision and durability in mind, the Littelfuse LRU-2664 ensures a secure and reliable connection between the smaller fuse and the larger fuse holder. This is paramount in applications where precise current interruption is essential for safeguarding sensitive electrical components. The primary function of this fuse reducer is to adapt fuse clip sizes, allowing for the correct amperage fuse to be installed, thereby maintaining the integrity of the circuit's protection scheme. This is particularly important during equipment upgrades or when replacing components where original fuse specifications may differ from available fuse sizes. Key benefits of employing the Littelfuse LRU-2664 include: * **Enhanced Safety:** Prevents the installation of fuses with higher current ratings than the circuit is designed to handle, significantly reducing the risk of overcurrent events. * **Cost-Effectiveness:** Eliminates the need for costly and time-consuming replacement of existing fuse clips or entire fuse blocks, making it an economical solution for system modifications. * **Versatile Application:** Suitable for a wide range of industrial machinery, control panels, power distribution units, and automotive electrical systems where fuse size adaptation is required. * **Reliable Performance:** Manufactured by Littelfuse, a globally recognized leader in circuit protection, ensuring high-quality materials and consistent performance. * **Ease of Installation:** The simple design allows for quick and straightforward integration into existing fuse holders, minimizing installation time and labor. When selecting fuse reducers, professionals consider factors such as the type of fuse holder, the desired fuse size, and the environmental conditions of the application. The Littelfuse LRU-2664 is designed to meet these demands, offering a robust solution that upholds the stringent safety standards expected in industrial settings. Its construction is built to withstand the rigors of demanding operational environments, ensuring long-term reliability. By choosing the Littelfuse LRU-2664, you are investing in a proven method to enhance electrical safety, optimize system performance, and ensure compliance with protective device requirements. This product exemplifies Littelfuse's commitment to providing innovative and dependable circuit protection solutions for a diverse array of electrical challenges.
  • Facilitates installation of smaller fuses into larger fuse clips.
  • Prevents overfusing and protects electrical circuits from damage.
  • Ensures correct amperage fuse is used for optimal circuit protection.
  • Durable construction for reliable performance in industrial environments.
  • Cost-effective solution for fuse holder size adaptation.

Specifications

Application
Industrial
Brand Name
Littelfuse
Material
Durable construction
Series
LRU
Size
Smaller fuses in larger clips
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.
600 Amp LoadBreak Elbow Connector End Fitting

EF6E

600 Amp LoadBreak Elbow Connector End Fitting

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.