Littelfuse LLNRK200 - 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

LLNRK200

Alternate Item Number: LNRK200.X

UPC: 079458330885


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Overview

The Littelfuse LLNRK200 POWR-PRO™ fuse, part of the robust LLNRK/LLSRK series, is engineered to deliver exceptional overload and short-circuit protection for critical electrical infrastructure. With a substantial current rating of 600 amperes, this fuse is designed for demanding applications including service entrance, main distribution panels, feeder circuits, and general-purpose branch circuits. Its high interrupting rating ensures safety and reliability in industrial, commercial, and utility environments where dependable circuit protection is paramount. A key advantage of the LLNRK200 is its compatibility with existing Class H fuse blocks. This feature allows for a straightforward and cost-effective upgrade path for systems currently utilizing lower interrupting rating Class H one-time or renewable fuses. By installing the LLNRK200, facility managers and electrical professionals can significantly enhance the safety and operational integrity of their electrical systems without the need for complete fuse block replacement. This upgrade capability is crucial for meeting evolving safety standards and ensuring protection against increasingly complex fault conditions. The POWR-PRO™ line from Littelfuse is synonymous with quality and performance. The LLNRK200 embodies this reputation, offering superior protection that safeguards equipment, personnel, and facilities from the damaging effects of electrical faults. Its robust construction is built to withstand the rigors of industrial environments, providing long-lasting and reliable service. Key features and benefits of the Littelfuse LLNRK200 include: * **Superior Protection:** Offers advanced overload and short-circuit protection for critical circuits. * **High Current Capacity:** Rated for up to 600 amperes, suitable for heavy-duty applications. * **Versatile Application:** Ideal for service entrance, main, feeder, and branch circuits. * **Class H Upgrade Solution:** Seamlessly replaces lower interrupting rating Class H one-time or renewable fuses in existing blocks. * **Enhanced Safety:** Protects valuable equipment and personnel from electrical faults. * **Reliable Performance:** Built with Littelfuse's commitment to quality and durability. When selecting fuses for industrial applications, professionals prioritize products that offer both high performance and ease of integration. The Littelfuse LLNRK200 POWR-PRO™ fuse meets these requirements, providing a dependable solution for enhancing electrical system safety and efficiency. Its ability to upgrade existing infrastructure makes it an economically sound choice for modernizing electrical protection schemes. Trust Littelfuse for your most critical circuit protection needs.
  • Littelfuse LLNRK200 POWR-PRO™ fuse for superior overload and short-circuit protection.
  • Rated for 600 amperes, suitable for service entrance, main, feeder, and branch circuits.
  • Compatible with existing Class H fuse blocks for easy system upgrades.
  • Enhances safety and reliability in industrial and commercial electrical systems.
  • Robust construction ensures dependable performance in demanding environments.

Specifications

Amperage Rating
200 Amp
Application
All general purpose circuits
Brand Name
Littelfuse
Current Rating
600 A
Series
LLNRK/LLSRK
Special Features
Time-Delay
Standard
Standard 248-12 UL Listed/CSA
Sub Brand
LLNRK Series
Type
Class RK1
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 Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

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

9F61BWW460

9F61 Size B Clips 1.6in
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

What technical support resources does Littelfuse offer?

Littelfuse provides a Techline with technical experts who can answer product questions, provide cross references, engineering drawings, and application assistance. They can be reached at 1-800-TEC-FUSE or [email protected].

How can distributors access Littelfuse product information?

Distributors can access product information through the Littelfuse Business Center website, which offers product availability, pricing, order placement, order status, and technical resources.

What training resources are available for Littelfuse products?

Littelfuse University provides in-depth training courses ranging from 3 to 20 minutes, covering product knowledge from basic to expert levels. Courses can be accessed at LittelfuseUniversity.com.

What marketing support does Littelfuse provide to distributors?

Littelfuse offers a Marketing to Marketing program that includes co-branded email campaigns, content sharing, marketing tools, product launch support, and website linking. The program is free and aims to help distributors grow sales.

How can distributors promote Littelfuse products?

Distributors can use Littelfuse's Promotional Allowance Program, which supports demand generation campaigns, sales incentives, email campaigns, trade shows, advertising, and digital campaigns. Activities must be pre-approved at least 30 days in advance.

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.