Littelfuse FLNR100 - FLNR100 is a Class RK5 fuse with an ampere rating of 100 and knife-blade-style construction.
Littelfuse

FLNR100

Alternate Item Number: FLNR100.V

UPC: 079458150827


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Overview

The Littelfuse FLNR100 is a robust and highly reliable Class RK5 fuse engineered for critical industrial circuit protection. Designed with a substantial 100-ampere rating, this fuse is an essential component for safeguarding heavy-duty electrical systems and equipment from damaging overcurrents and short circuits. Its distinctive knife-blade-style construction ensures a secure, high-conductivity connection within compatible fuse holders, facilitating efficient power transfer and minimizing resistive losses. This design also promotes quick and straightforward installation or replacement, a crucial factor in minimizing operational downtime and associated maintenance costs in demanding industrial environments. As a Class RK5 fuse, the FLNR100 offers a high degree of interrupting capacity, making it suitable for applications where fault currents can be significant. This classification signifies its ability to safely interrupt and clear potentially destructive electrical faults without causing further damage to the protected circuit or equipment. The Littelfuse brand is synonymous with quality and dependability in the electrical protection industry, and the FLNR100 upholds this reputation through its durable construction and adherence to stringent industry standards. Its performance is critical in preventing equipment failure, reducing the risk of electrical fires, and ensuring the overall safety and efficiency of industrial operations. The versatility of the FLNR100 makes it an ideal choice for a wide array of industrial applications. It is commonly specified for use in: * **Power Distribution Systems:** Protecting transformers, switchgear, and main service panels. * **Motor Control Circuits:** Providing essential protection for industrial motors, preventing damage from overloads and short circuits. * **Industrial Machinery:** Safeguarding complex automated equipment, production lines, and heavy machinery. * **HVAC Systems:** Ensuring reliable operation of large-scale heating, ventilation, and air conditioning units. * **Renewable Energy Systems:** Protecting components within solar and wind power installations. Professionals select fuses like the FLNR100 based on precise current and voltage requirements, as well as the specific protection class needed for the application. The knife-blade design of the FLNR100 is particularly advantageous for applications requiring frequent access or where space is a consideration, allowing for rapid fuse changes without specialized tools. Trusting Littelfuse for your industrial fuse needs means investing in proven technology and a commitment to operational integrity. The FLNR100 is more than just a fuse; it's a critical element in maintaining the continuity and safety of your industrial infrastructure, offering peace of mind through superior overcurrent protection.
  • Littelfuse FLNR100 Class RK5 fuse
  • 100 Ampere (100A) current rating
  • Knife-blade style construction for secure connections
  • High interrupting capacity for industrial applications
  • Reliable overcurrent and short-circuit protection

Specifications

Application
General Purpose
Brand Name
Littelfuse
Special Features
Time-Delay
Standard
Standard 248-12 UL Listed/CSA
Sub Brand
POWR-GARD FLNR Series
Type
Class RK5
Package Weight (Imperial)
0.318 L
Package Weight (Metric)
144.500 g
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9F61 Size B Clips 1.6in

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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.