Littelfuse LLSRK02.8 - RK1 fuses are extremely current-limiting fuses meaning they greatly reduce or eliminate damage to circuits and equipment under short-circuit conditions. Replacing existing Class H, K and RK5 fuses with RK1 fuses is one of the easiest ways to immediately improve the protection of plant workers and equipment.
Littelfuse

LLSRK02.8

Alternate Item Number: LSRK02.8T

UPC: 079458350463

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Overview

Littelfuse RK1 fuses (SKU: LLSRK02.8) are high-performance, current-limiting fuses engineered to provide superior protection for industrial electrical systems. Designed as a direct replacement for Class H, K, and RK5 fuses, these fuses significantly reduce or eliminate damage to circuits and connected equipment during short-circuit conditions, ensuring enhanced safety for plant personnel and operational continuity. The RK1 series is a trusted solution in demanding industrial environments where reliability and fault protection are critical to maintaining productivity and minimizing costly downtime. **Why Choose Littelfuse RK1 Fuses?** Littelfuse is a global leader in circuit protection, with decades of expertise in designing fuses that meet the rigorous demands of industrial applications. The RK1 series leverages advanced current-limiting technology to interrupt fault currents rapidly, limiting the let-through energy to levels far below those of conventional fuses. This capability not only protects sensitive equipment such as motors, transformers, and control panels but also reduces the risk of arc flash incidents, enhancing workplace safety for engineers and technicians. **Key Features and Benefits** - **Extreme Current-Limiting Performance:** The RK1 fuses are engineered to react almost instantaneously to fault conditions, drastically reducing the let-through current and thermal stress on downstream equipment. This minimizes the risk of catastrophic failure and extends the lifespan of critical assets. - **Direct Replacement for Legacy Fuses:** Compatible with existing Class H, K, and RK5 fuse holders, the RK1 series offers a seamless upgrade path without requiring modifications to panel configurations. This makes it an ideal solution for facilities looking to modernize their protection systems efficiently. - **Wide Range of Ampere Ratings:** Available in multiple ampere ratings, the RK1 fuses support a broad spectrum of industrial applications, from small control circuits to large distribution systems. This versatility ensures that engineers can find the right protection level for their specific needs. - **High Interrupting Rating:** With a robust interrupting rating, the RK1 fuses can safely handle high fault currents, making them suitable for use in both low- and medium-voltage systems. This reliability is essential in industries such as manufacturing, oil and gas, mining, and utilities, where electrical faults can pose significant risks. - **Compliance with Industry Standards:** Littelfuse RK1 fuses meet or exceed stringent industry standards, including UL and CSA certifications, ensuring compliance with safety regulations and providing peace of mind for facility managers and compliance officers. **Typical Applications** The RK1 series is widely used across a variety of industrial sectors, including: - **Manufacturing Plants:** Protecting machinery, conveyor systems, and control panels from short-circuit faults. - **Power Distribution Systems:** Safeguarding transformers, switchgear, and distribution panels in commercial and industrial facilities. - **Oil and Gas Facilities:** Providing reliable fault protection in harsh environments where equipment reliability is paramount. - **Mining Operations:** Ensuring safety and continuity in rugged conditions with high fault current potential. - **Renewable Energy Systems:** Protecting inverters, battery storage systems, and grid-tied equipment from fault conditions. **Installation and Maintenance Considerations** Installing RK1 fuses is straightforward, thanks to their compatibility with standard Class H, K, and RK5 fuse holders. However, professionals should ensure that the fuse ampere rating matches the circuit requirements to avoid nuisance tripping or inadequate protection. Regular inspection of fuses and fuse holders is recommended to maintain optimal performance and safety. Littelfuse provides comprehensive technical support and documentation to assist engineers in selecting and installing the correct fuse for their applications. **Why Trust Littelfuse?** With over 100 years of innovation in circuit protection, Littelfuse has established itself as a trusted partner for industries worldwide. The company’s commitment to research and development ensures that its products, including the RK1 series, deliver cutting-edge performance and reliability. By choosing Littelfuse RK1 fuses, facility managers and electrical engineers can enhance the safety, efficiency, and longevity of their electrical systems while reducing maintenance costs and downtime. Upgrade to Littelfuse RK1 fuses today and experience the difference in protection and peace of mind.
  • Extreme current-limiting protection for industrial circuits
  • Direct replacement for Class H, K, and RK5 fuses
  • High interrupting rating for reliable fault protection
  • Wide range of ampere ratings for versatile applications
  • Compliance with UL and CSA industry standards

Specifications

Amperage Rating
2.8 Amp
Application
All general purpose circuits
Brand Name
Littelfuse
Special Features
Time-Delay
Standard
Standard 248-12 UL Listed/CSA
Sub Brand
LLSRK 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 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.