Littelfuse FLNR500 - FLNR500 is a Class RK5 fuse with an ampere rating of 500 and knife-blade-style construction.
Littelfuse

FLNR500

Alternate Item Number: FLNR500.X

UPC: 079458150964


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Overview

The Littelfuse FLNR500 is a high-performance Class RK5 fuse engineered to provide robust and reliable circuit protection for demanding industrial power distribution systems. Designed with a substantial 500 Ampere (A) current rating, this fuse is ideal for safeguarding critical electrical equipment and infrastructure against damaging overcurrent and short-circuit conditions. Its Class RK5 rating signifies adherence to stringent industry standards, ensuring superior performance characteristics, including excellent current limitation and arc suppression capabilities, which are vital for minimizing equipment stress and preventing catastrophic failures. The FLNR500 features a practical and secure knife-blade-style connection. This design facilitates straightforward and efficient installation into compatible fuse holders, reducing labor time and minimizing the risk of improper connections. The robust construction of the knife-blade terminals ensures a low-resistance, high-integrity electrical contact, crucial for maintaining system efficiency and preventing overheating. This makes the FLNR500 a preferred choice for applications where reliability and ease of maintenance are paramount. Littelfuse is a globally recognized leader in circuit protection, and the FLNR500 embodies their commitment to quality and innovation. This fuse is specifically designed for industrial environments where equipment operates under heavy loads and requires dependable protection. Applications for the FLNR500 include motor control centers, large machinery, power transformers, and main service disconnects, where its high ampere rating and Class RK5 performance are essential. By incorporating the FLNR500 into your electrical systems, you enhance operational safety, protect valuable assets from electrical damage, and contribute to reduced downtime and associated maintenance costs. Trust the Littelfuse FLNR500 for uncompromising power protection that meets the rigorous demands of modern industrial operations. Key Features and Benefits: * **High Current Capacity:** With a 500A rating, it's suitable for high-power industrial circuits. * **Class RK5 Performance:** Offers superior overcurrent protection and current limitation. * **Knife-Blade Connection:** Ensures secure, efficient, and easy installation. * **Robust Industrial Design:** Built to withstand harsh operating conditions. * **Reliable Circuit Protection:** Safeguards critical equipment and prevents downtime. * **Trusted Manufacturer:** From Littelfuse, a leader in circuit protection solutions.
  • Littelfuse FLNR500 Class RK5 fuse
  • 500 Ampere (A) current rating
  • Knife-blade-style connection for secure installation
  • Designed for demanding industrial power protection applications
  • Ensures reliable circuit protection against overcurrents and short circuits

Specifications

Application
General Purpose
Brand Name
Littelfuse
Connection Type
Knife-blade
Current Rating
500 A
Series
FLNR
Special Features
Time-Delay
Standard
Standard 248-12 UL Listed/CSA
Sub Brand
POWR-GARD FLNR Series
Type
Class RK5
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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.