Littelfuse LLNRK008 - 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

LLNRK008

Alternate Item Number: LNRK008.T

UPC: 079458330632

Documents & Media
BrochureTechnical BulletinTechnical DrawingSpecification Sheet

Contact for Pricing

Minimum Qty: 10

Multiplier: 10

*Contact for lower quantities*

Overview

The **Littelfuse LLNRK008 POWR-PRO™ fuse** from the **LLNRK/LLSRK series** is a high-performance, industrial-grade protective device engineered for **service entrance, main, feeder, and general-purpose branch circuits up to 600 amperes**. Designed to deliver **superior overload and short circuit protection**, this fuse ensures reliable performance in the most demanding commercial and industrial electrical systems. Whether upgrading legacy Class H fuse blocks or installing in new applications, the LLNRK008 provides a seamless solution for systems requiring enhanced safety and operational efficiency. **Key Features and Benefits:** - **High Interrupting Capacity:** The LLNRK008 is built to handle fault currents effectively, making it ideal for critical installations where reliability is non-negotiable. Its robust construction ensures consistent performance even in harsh environments, reducing the risk of equipment damage and unplanned downtime. - **Compatibility with Class H Fuse Blocks:** One of the standout advantages of the LLNRK008 is its **drop-in compatibility** with existing Class H fuse blocks. This feature allows facility managers and electrical contractors to **upgrade systems without costly modifications**, preserving infrastructure investments while improving protection levels. - **Superior Overload and Short Circuit Protection:** Unlike conventional fuses, the LLNRK008 is engineered to respond quickly and accurately to both overload conditions and short circuits. This dual capability ensures that sensitive equipment is shielded from damage, while also preventing catastrophic failures that could pose safety hazards. - **Durable and Long-Lasting Construction:** Constructed with high-quality materials, the LLNRK008 is designed for longevity and reliability. Its **resistance to corrosion, vibration, and thermal stress** makes it a trusted choice for industrial applications where reliability is paramount. - **Wide Range of Applications:** The LLNRK008 is versatile enough to be used in a variety of settings, including **manufacturing plants, data centers, commercial buildings, and utility substations**. Its adaptability makes it a go-to solution for engineers and electricians seeking a single fuse type that meets multiple application needs. **Industry Applications and Use Cases:** In **manufacturing facilities**, the LLNRK008 is often deployed in **main distribution panels** to protect machinery and production lines from electrical faults. Its ability to interrupt high fault currents ensures that critical operations remain uninterrupted, minimizing costly downtime. Similarly, in **data centers**, where power reliability is essential, this fuse provides an additional layer of protection against surges and short circuits, safeguarding sensitive IT infrastructure. For **commercial buildings**, such as office complexes or retail centers, the LLNRK008 offers a cost-effective way to upgrade aging electrical systems. Its compatibility with existing infrastructure means that building owners can enhance safety without the need for extensive rewiring or panel replacements. In **utility and power distribution applications**, the fuse’s high interrupting rating ensures that it can handle the demands of large-scale electrical networks, providing peace of mind for utility operators. **Why Choose Littelfuse?** Littelfuse is a **global leader in circuit protection**, with over a century of innovation and expertise in electrical safety. The company’s **POWR-PRO™ series** is trusted by professionals worldwide for its **precision engineering, rigorous testing, and adherence to industry standards**. When selecting the LLNRK008, you’re not just choosing a fuse—you’re investing in a product backed by a manufacturer committed to safety, reliability, and performance. **Installation and Maintenance Considerations:** Installing the LLNRK008 is straightforward, thanks to its **standard Class H fuse block compatibility**. However, professionals should always follow **best practices for electrical safety**, including verifying voltage and current ratings, ensuring proper torque on connections, and inspecting the fuse for any signs of damage before installation. Routine maintenance involves visual inspections for corrosion or wear, as well as periodic testing to confirm the fuse’s operational integrity. For engineers and electricians tasked with selecting the right protective device, the LLNRK008 represents a **smart, future-proof choice**. Its combination of **high performance, ease of installation, and compatibility with existing systems** makes it an invaluable addition to any electrical protection strategy. Whether you’re upgrading an outdated system or designing a new installation, the Littelfuse LLNRK008 POWR-PRO™ fuse delivers the **safety, reliability, and durability** required in today’s industrial and commercial environments.
  • 600A rated for service entrance, main, feeder, and branch circuits
  • Superior overload and short circuit protection
  • Drop-in replacement for Class H fuse blocks (no costly modifications)
  • High interrupting capacity for demanding industrial applications
  • Durable construction resists corrosion, vibration, and thermal stress

Specifications

Amperage Rating
8 Amp
Application
All general purpose circuits
Brand Name
Littelfuse
Special Features
Time-Delay
Standard
Standard 248-12 UL Listed/CSA
Sub Brand
LLNRK Series
Type
Class RK1
Package Weight (Imperial)
0.041 L
Package Weight (Metric)
0.019 kg
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.