Littelfuse FLNR080 - FLNR080 is a Class RK5 fuse with an ampere rating of 80 and knife-blade-style construction.
Littelfuse

FLNR080

Alternate Item Number: FLNR080.V

UPC: 079458150803

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Overview

The **Littelfuse FLNR080** is a high-performance **Class RK5 fuse** engineered for demanding industrial applications where reliable overcurrent protection is critical. With an **80A ampere rating** and **knife-blade-style construction**, this fuse delivers secure electrical connections while meeting stringent safety and performance standards. Designed for use in power distribution systems, motor control circuits, and industrial machinery, the FLNR080 ensures robust protection against short circuits, overloads, and transient faults—common challenges in heavy-duty environments. Class RK5 fuses are a premium choice for industrial settings due to their **high interrupting rating**, **fast response time**, and **superior coordination** with downstream protective devices. The FLNR080’s knife-blade design allows for easy installation and removal in compatible fuse blocks, reducing downtime during maintenance or replacement. Its **compact yet durable construction** resists mechanical stress, vibration, and environmental contaminants, making it ideal for harsh operating conditions such as manufacturing plants, mining operations, and renewable energy facilities. Industrial professionals rely on **Littelfuse** for overcurrent protection solutions because of the company’s **decades of expertise** in electrical safety and its commitment to innovation. The FLNR080 exemplifies this legacy, offering **consistent performance** across a wide range of voltages and frequencies. Whether protecting sensitive electronics in control panels or safeguarding high-power motors in conveyor systems, this fuse provides **predictable, repeatable protection**—a critical requirement in modern industrial automation. Key advantages of the **Littelfuse FLNR080** include: - **High interrupting rating** for superior short-circuit protection in industrial power systems. - **Knife-blade construction** ensures secure, low-resistance connections in fuse blocks. - **Fast-acting response** to minimize damage from overloads and faults. - **Compliance with UL 248 standards**, meeting or exceeding industry safety requirements. - **Wide compatibility** with industrial fuse holders and disconnect switches. For engineers and maintenance teams, selecting the right fuse involves balancing **performance, reliability, and compliance**. The FLNR080 excels in all three areas, making it a trusted component in **power distribution panels, motor starters, and branch circuit protection**. Its **80A rating** is particularly well-suited for medium-to-high-power applications, such as: - **Motor control centers (MCCs)** in manufacturing facilities. - **Variable frequency drives (VFDs)** and industrial automation systems. - **Solar and wind power inverters** where DC or AC overcurrent protection is essential. - **Heavy machinery** in mining, oil & gas, and construction sectors. Littelfuse’s **global reputation** for quality is backed by rigorous testing and a focus on **long-term durability**. The FLNR080 is no exception—designed to operate reliably in temperatures ranging from **-30°C to 125°C**, it withstands the thermal and electrical stresses of continuous industrial use. Additionally, its **UL and CE certifications** ensure seamless integration into international safety frameworks, reducing compliance risks for multinational operations. When replacing or specifying fuses for industrial applications, professionals prioritize **interchangeability, safety, and uptime**. The FLNR080 meets these priorities with **standardized dimensions** that align with Class RK5 fuse blocks, eliminating compatibility concerns. Its **low let-through energy (I²t)** also helps preserve downstream equipment, reducing costly repairs and unplanned outages. For facilities where **electrical safety and operational continuity** are non-negotiable, the **Littelfuse FLNR080** is a proven solution. Whether upgrading existing systems or designing new ones, this fuse delivers the **performance, durability, and peace of mind** that industrial operators demand. Trusted by engineers worldwide, Littelfuse continues to set the benchmark for overcurrent protection in the most demanding environments.
  • 80A Class RK5 fuse with knife-blade construction for secure industrial connections
  • High interrupting rating for superior short-circuit and overload protection
  • Fast-acting response to minimize equipment damage and downtime
  • Compliant with UL 248 standards for industrial safety and reliability
  • Ideal for power distribution, motor control, and heavy machinery applications

Specifications

Application
General Purpose
Brand Name
Littelfuse
Connection Type
Knife-blade
Current Rating
80 A
Mounting Type
Fuse Block
Series
Class RK5
Size
Class RK5
Special Features
Time-Delay
Standard
Standard 248-12 UL Listed/CSA
Sub Brand
POWR-GARD FLNR Series
Type
Class RK5
Package Weight (Imperial)
0.320 L
Package Weight (Metric)
0.145 kg
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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.