Littelfuse KLKR002S - KLKR series Class CC fuses are fast-acting fuses intended for general-purpose branch circuit protection. Their compact size, fast-acting overload response, and their highly current limiting design make them ideal for use in OEM equipment and control panels because Solid-state devices such as SCRs and other electronic equipment generally require fast-acting protection.
Littelfuse

KLKR002S

Alternate Item Number: KLKR002.TS

UPC: 079458189766

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Minimum Qty: 10

Multiplier: 10

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Overview

The **Littelfuse KLKR002S Class CC fast-acting fuse** is a high-performance protection solution engineered for demanding industrial and electronic applications. Designed as part of the KLKR series, this fuse combines compact Class CC dimensions with ultra-fast response characteristics, making it an ideal choice for protecting sensitive solid-state devices such as SCRs, thyristors, and other semiconductor-based equipment. Manufactured by Littelfuse—a global leader in circuit protection with over a century of innovation—this fuse delivers reliable performance in branch circuit protection scenarios where rapid overload response and high current limiting are critical to preventing catastrophic failures. Class CC fuses like the KLKR002S are specifically formulated for general-purpose branch circuit applications, offering a balanced blend of speed and interrupting capacity. Their compact footprint allows for efficient space utilization in densely packed control panels and OEM machinery, while their fast-acting design ensures immediate interruption during fault conditions, minimizing damage to downstream components. This makes them particularly well-suited for environments where downtime and equipment failure pose significant operational and financial risks. **Key Applications and Industries** The KLKR002S is widely deployed across multiple industrial sectors, including: - **Industrial Automation**: Protecting PLCs, motor controllers, and variable frequency drives (VFDs) from transient overloads and short circuits. - **Power Electronics**: Safeguarding inverters, converters, and power supplies in renewable energy systems, UPS units, and battery management systems. - **Machine Tool Manufacturing**: Ensuring reliable operation of CNC machines, robotic systems, and automated assembly lines. - **Semiconductor Fabrication**: Providing precise protection for sensitive test equipment and process control systems. - **Commercial HVAC/R Systems**: Supporting the protection of electronic control boards in heating, ventilation, air conditioning, and refrigeration units. **Why Choose Littelfuse KLKR002S?** Selecting the right fuse involves balancing performance, reliability, and compatibility with system requirements. The KLKR002S excels in several key areas: - **Fast-Acting Response**: Engineered to interrupt fault currents rapidly, reducing the risk of thermal and mechanical stress on protected components. - **High Current Limiting**: Limits let-through energy during faults, preserving the integrity of downstream devices and wiring. - **Compact Class CC Design**: Fits standard Class CC fuse blocks and holders, offering a space-saving alternative to larger fuse types without compromising protection. - **Wide Voltage Range**: Compatible with 600V AC/DC systems, ensuring versatility across diverse industrial applications. - **UL 248-4 Listed**: Meets stringent safety and performance standards, providing peace of mind in critical applications. **Installation and Compatibility Considerations** Proper installation is essential to maximize the effectiveness of the KLKR002S. Professionals should ensure: - **Correct Fuse Holder Selection**: Use Class CC fuse blocks or holders rated for the fuse’s voltage and current specifications. - **Adequate Clearance**: Maintain proper spacing around the fuse to prevent heat buildup and ensure optimal airflow. - **System Coordination**: Pair the fuse with upstream and downstream protective devices to achieve selective coordination, minimizing unnecessary power disruptions. - **Environmental Conditions**: Verify that the operating environment (temperature, humidity, vibration) aligns with the fuse’s rated conditions. Littelfuse’s reputation for quality and innovation in circuit protection is unmatched, with a legacy spanning over 100 years. The KLKR002S Class CC fuse exemplifies this commitment, offering engineers and OEMs a trusted solution for protecting critical infrastructure. Whether deployed in a compact control panel or a large-scale industrial system, this fuse delivers the performance and reliability needed to maintain operational continuity and safeguard valuable equipment. For applications where fast-acting, high-current limiting protection is non-negotiable, the Littelfuse KLKR002S stands as a proven choice.
  • Fast-acting response for rapid fault interruption
  • High current limiting to protect sensitive electronics
  • Compact Class CC design for space-efficient installations
  • UL 248-4 listed for compliance and reliability
  • Ideal for OEM equipment, control panels, and power electronics

Specifications

Application
General Purpose
Brand Name
Littelfuse
Special Features
Fast-Acting
Standard
248-4 UL Listed/CSA
Sub Brand
KLKR Series
Type
Class CC
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.