Littelfuse KLC004 - Designed to protect today’s equipment and systems, Littelfuse semiconductor fuses are manufactured with Littelfuse-developed technology that sets tomorrow’s standards for accuracy, consistent quality, reliability, and predictable performance. By using advanced metallurgical, polymer, and materials research; mathematical modeling, and computerized statistical analysis; Littelfuse engineers have redefined “State-of-the-Art.”
Littelfuse

KLC004

Alternate Item Number: 0KLC004.T

UPC: 079458230536

Documents & Media
BrochureTechnical BulletinSpecification Sheet

Contact for Pricing

Overview

The Littelfuse KLC004 semiconductor fuse represents the pinnacle of overcurrent protection technology, meticulously engineered to safeguard today's sophisticated electronic equipment and critical systems. Manufactured by Littelfuse, a globally recognized leader in circuit protection, this fuse leverages proprietary, state-of-the-art technology that consistently redefines industry benchmarks for accuracy, unwavering quality, and predictable performance. By integrating advanced metallurgical, polymer, and materials research with sophisticated mathematical modeling and computerized statistical analysis, Littelfuse engineers have achieved a new 'State-of-the-Art' in fuse design and functionality. This commitment to innovation ensures that the KLC004 fuse delivers exceptional reliability, crucial for applications where system downtime is not an option. Its design focuses on providing precise and consistent protection against damaging overcurrent events, thereby extending the operational lifespan of valuable equipment and minimizing the risk of costly repairs or replacements. The inherent quality and predictable behavior of the KLC004 make it an indispensable component in a wide array of demanding industrial environments, from power electronics and telecommunications infrastructure to renewable energy systems and advanced manufacturing machinery. Key benefits and features of the Littelfuse KLC004 semiconductor fuse include: * **Unparalleled Accuracy:** Advanced design ensures precise tripping characteristics, protecting sensitive semiconductor devices from even minor overcurrents. * **Exceptional Reliability:** Built with premium materials and rigorous manufacturing processes, guaranteeing consistent performance over time and under various operating conditions. * **Predictable Performance:** Mathematical modeling and statistical analysis contribute to fuses that behave exactly as expected, simplifying system design and troubleshooting. * **State-of-the-Art Technology:** Incorporates Littelfuse's latest advancements in materials science and engineering for superior protection capabilities. * **Broad Applicability:** Suitable for protecting a wide range of semiconductor devices and electronic circuits in diverse industrial sectors. When selecting semiconductor fuses, engineers prioritize components that offer robust protection without compromising system efficiency or introducing unnecessary complexity. The KLC004, with its advanced technological underpinnings and Littelfuse's proven track record, stands out as a premier choice. Its ability to provide dependable, consistent protection is vital for maintaining the integrity of complex electronic assemblies and ensuring operational continuity. This fuse is not merely a component; it is a critical element in a robust protection strategy, designed to meet and exceed the evolving demands of modern industrial applications. Trust in Littelfuse's expertise to deliver the advanced circuit protection solutions your critical systems require.
  • Advanced semiconductor protection technology by Littelfuse
  • Engineered for accuracy, quality, reliability, and predictable performance
  • Utilizes cutting-edge metallurgical, polymer, and materials research
  • Sets new industry standards for fuse functionality
  • Designed to safeguard critical equipment and systems

Specifications

Application
Protection of Semiconductors
Brand Name
Littelfuse
Special Features
Very-Fast Acting
Standard
UL Recognized
Sub Brand
POWR-GARD KLC Series
Type
Semiconductor Fuse
Package Weight (Imperial)
0.047 L
Package Weight (Metric)
21.200 g
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.