Littelfuse LLNRK009 - Littelfuse LLNRK and LLSRK series POWR-PRO™ fuses provide superior overload and short circuit protection for service entrance, main, feeder and general-purpose branch circuits up to 600 amperes. LLNRK/LLSRK series fuses can be installed in existing Class H fuse blocks to upgrade systems containing lower interrupting rating Class H one-time or renewable fuses.
Littelfuse

LLNRK009

Alternate Item Number: LNRK009.T

UPC: 079458330649


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Overview

The Littelfuse LLNRK009 POWR-PRO™ fuse from the LLNRK/LLSRK series delivers unmatched overload and short circuit protection for critical electrical systems, supporting service entrance, main, feeder, and general-purpose branch circuits up to 600 amperes. Engineered for high-performance applications, these fuses are rated at 600 VAC and designed to seamlessly integrate into existing Class H fuse blocks, enabling cost-effective system upgrades without the need for full infrastructure replacement. This compatibility makes the LLNRK009 an ideal solution for facilities seeking to enhance safety and reliability while maintaining compliance with modern electrical standards. Littelfuse, a global leader in circuit protection solutions, has designed the LLNRK/LLSRK series to address the evolving demands of industrial and commercial electrical systems. These fuses provide superior protection against both overloads and short circuits, ensuring operational continuity and reducing the risk of equipment damage or downtime. The robust construction of the LLNRK009 ensures durability in demanding environments, while its high interrupting rating makes it suitable for applications where fault currents may exceed the capabilities of traditional Class H fuses. Industries such as manufacturing, data centers, healthcare, and commercial buildings rely on Littelfuse POWR-PRO™ fuses to safeguard their electrical infrastructure. The LLNRK009 is particularly well-suited for: - Service entrance protection in large facilities - Main and feeder circuit applications in industrial plants - Branch circuit protection in commercial buildings - Upgrades for systems previously protected by lower-rated Class H fuses Installation is straightforward, as the LLNRK009 is designed to fit standard Class H fuse blocks, eliminating the need for costly modifications. This plug-and-play compatibility reduces downtime and simplifies maintenance, making it a preferred choice for facility managers and electrical contractors. Additionally, the fuses' high performance ensures long-term reliability, reducing the frequency of replacements and associated labor costs. Littelfuse’s reputation for innovation and quality in circuit protection is unmatched, with a legacy spanning over a century. The LLNRK/LLSRK series reflects this commitment, offering engineers and electricians a trusted solution for critical protection needs. By choosing the LLNRK009, professionals can enhance system safety, improve energy efficiency, and ensure compliance with NEC and other regulatory standards. Whether upgrading an existing system or specifying new installations, the Littelfuse LLNRK009 POWR-PRO™ fuse is a dependable choice for superior circuit protection.
  • 600A current rating with 600 VAC voltage rating for high-performance applications
  • Superior overload and short circuit protection for service entrance, main, feeder, and branch circuits
  • Compatible with existing Class H fuse blocks for seamless system upgrades
  • High interrupting rating ensures reliable performance in demanding industrial and commercial environments
  • Trusted Littelfuse quality for long-term reliability and compliance with modern electrical standards

Specifications

Amperage Rating
9 Amp
Application
All general purpose circuits
Brand Name
Littelfuse
Current Rating
600 A
Series
POWR-PRO™ (LLNRK/LLSRK series)
Special Features
Time-Delay
Standard
Standard 248-12 UL Listed/CSA
Sub Brand
LLNRK Series
Type
Class RK1
Voltage Rating
600 VAC
Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount

GPM-SRR90

Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount
Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20

C331156

Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20
Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8

1SCM8

Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8
Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
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.
9F61 Size B Clips 1.6in

9F61BWW460

9F61 Size B Clips 1.6in

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.