Littelfuse KLC007 - 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

KLC007

Alternate Item Number: 0KLC007.T

UPC: 079458230611


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Overview

The **Littelfuse KLC007 semiconductor fuse** represents the pinnacle of overcurrent protection for modern industrial, commercial, and power electronics systems. Engineered by Littelfuse—a global leader in circuit protection solutions—the KLC007 combines cutting-edge metallurgical research, polymer science, and advanced computational modeling to deliver unparalleled accuracy, consistency, and reliability. This fuse is not just a component; it is a critical safeguard for mission-critical applications where equipment failure is not an option. **Why Semiconductor Fuses Like the KLC007 Are Essential** Semiconductor fuses are specifically designed to protect sensitive electronic components such as power semiconductors, thyristors, diodes, and IGBTs from destructive overcurrent and short-circuit events. Unlike standard fuses, semiconductor fuses feature ultra-fast response times, precise current interruption, and low let-through energy (I²t), which prevents thermal and mechanical stress on downstream components. The KLC007 excels in applications where even microsecond delays in fault detection could result in catastrophic failure, making it ideal for: - **Power Conversion Systems**: Inverters, converters, and motor drives in renewable energy (solar/wind), industrial automation, and electric vehicle charging stations. - **Semiconductor Protection**: Safeguarding high-power transistors, rectifiers, and thyristors in high-frequency switching applications. - **Industrial Equipment**: Protecting sensitive electronics in CNC machines, robotics, and variable frequency drives (VFDs). - **Telecommunications & Data Centers**: Ensuring uptime in critical power distribution networks by preventing cascading failures. - **Medical & Aerospace Electronics**: Where reliability and precision are non-negotiable for patient safety and mission success. **Advanced Technology Behind the KLC007** Littelfuse’s proprietary technology underpins the KLC007’s superior performance. By leveraging **mathematical modeling** and **computerized statistical analysis**, Littelfuse engineers optimize fuse element design for consistent breaking capacity and predictable performance across varying fault conditions. The fuse’s construction incorporates: - **High-Purity Silver Elements**: Ensures low resistance and minimal voltage drop, reducing power losses in high-current circuits. - **Advanced Quenching Materials**: Rapidly extinguishes arcs to prevent re-strike and secondary damage. - **Precision Calibration**: Tight manufacturing tolerances guarantee repeatable performance, critical for compliance with international standards (e.g., UL, IEC). - **Robust Housing**: Designed for harsh environments, with resistance to vibration, temperature extremes, and corrosive atmospheres. **Industry Trust in Littelfuse** With over **90 years of innovation** in circuit protection, Littelfuse is the preferred partner for engineers and procurement professionals worldwide. The company’s semiconductor fuses, including the KLC007, are trusted by Fortune 500 manufacturers and OEMs for their **predictable performance, long service life, and compliance with stringent industry standards**. Whether deployed in a compact industrial control panel or a utility-scale power substation, the KLC007 delivers the reliability required to meet **safety certifications (UL 248, IEC 60269)** and **performance guarantees**. **Installation & Selection Considerations** Selecting the right semiconductor fuse requires balancing **breaking capacity (I₁), rated current (Iₙ), and response time (I²t)** with system requirements. The KLC007 is optimized for applications demanding: - **High Interrupting Ratings (up to 200kA)**: Suitable for high-fault-current environments like motor starters and power distribution panels. - **Low I²t Values**: Minimizes let-through energy, protecting downstream components from thermal stress. - **Compact Footprint**: Enables space-efficient designs in densely packed control enclosures. For professionals, the KLC007 offers **plug-and-play compatibility** with standard fuse holders and disconnect switches, reducing installation complexity. Littelfuse provides comprehensive **technical documentation**, including **time-current curves (TCC)**, **application notes**, and **compliance certificates**, to simplify the selection process. **Long-Term Value & ROI** Investing in the KLC007 semiconductor fuse translates to **reduced downtime, lower maintenance costs, and extended equipment lifespan**. By preventing catastrophic failures, it minimizes unplanned outages and protects against costly repairs or replacements. For procurement teams, Littelfuse’s global supply chain and **just-in-time inventory** options ensure availability without compromising on quality. **Conclusion** The **Littelfuse KLC007** is more than a fuse—it’s a **reliability multiplier** for modern electronics. Whether you’re designing a next-generation inverter, retrofitting an industrial drive, or ensuring uptime in a data center, this fuse delivers the **precision, durability, and peace of mind** that engineers demand. Partner with Littelfuse to safeguard your systems with the industry’s gold standard in semiconductor protection.
  • Ultra-fast response time for semiconductor protection
  • High interrupting rating (up to 200kA) for fault current handling
  • Low I²t values minimize let-through energy and component stress
  • Compliant with UL 248 and IEC 60269 standards
  • Compact design for space-efficient installations

Specifications

Application
Protection of Semiconductors
Brand Name
Littelfuse
Series
KLC
Special Features
Very-Fast Acting
Standard
UL Recognized
Sub Brand
POWR-GARD KLC Series
Type
Semiconductor Fuse
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.