Littelfuse KLKD004H - The KLKD fuse series is fast-acting with a high DC voltage rating. This family of Midget style fuses (10 x 38 mm) is used in solar combiner boxes and in circuits with DC fault currents up to 50,000 amperes. KLKD fuses are available in standard and board-mount configurations. In addition, the KLKD series has been designed to meet both the UL and IEC photovoltaic fuse standards. Littelfuse offers a wide range of ampere ratings to match specific requirements in a variety of applications.
Littelfuse

KLKD004H

Alternate Item Number: KLKD004.H

UPC: 079458964554

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Overview

The Littelfuse KLKD004H Midget fuse (SKU: KLKD004H) represents a critical component for robust DC circuit protection, particularly within demanding solar energy systems and industrial applications. Engineered for fast-acting performance, this 10x38 mm fuse is specifically designed to safeguard solar combiner boxes and other DC circuits against damaging fault currents, offering an impressive interruption rating of up to 50,000 amperes. This high DC voltage rating capability makes it an indispensable choice for modern renewable energy infrastructure where reliable and safe operation is paramount. Littelfuse, a globally recognized leader in circuit protection, has developed the KLKD series to meet stringent international standards, including both UL and IEC photovoltaic fuse specifications. This compliance ensures that installations utilizing the KLKD004H fuse adhere to the highest levels of safety and performance required in the solar industry. The fuse's fast-acting nature is crucial for quickly isolating faults, thereby preventing cascading failures and minimizing potential damage to sensitive equipment. Available in both standard and board-mount configurations, the KLKD004H offers versatility for various installation scenarios. Whether integrating into a larger system within a combiner box or directly onto a printed circuit board, installers can select the optimal mounting style for their specific design. Furthermore, Littelfuse provides a comprehensive range of ampere ratings within the KLKD series, allowing engineers and system designers to precisely match the fuse's capacity to the unique current requirements of their circuits. This granular selection capability is vital for ensuring optimal protection without oversizing, which can lead to unnecessary costs and potential under-protection. Key benefits and features of the Littelfuse KLKD004H include: * **Exceptional Fault Current Protection:** With a 50,000A DC interruption rating, it effectively shields against severe short-circuit events. * **Fast-Acting Performance:** Rapidly interrupts fault currents to prevent equipment damage and ensure system safety. * **High DC Voltage Capability:** Designed for circuits operating at elevated DC voltages, common in solar arrays. * **Industry Standard Compliance:** Meets UL and IEC photovoltaic fuse standards, ensuring reliability and regulatory adherence. * **Versatile Configurations:** Offered in both standard and board-mount options to suit diverse installation needs. * **Wide Ampere Range Availability:** Allows for precise application matching across various current demands. The KLKD004H fuse is an ideal solution for solar PV systems, off-grid power solutions, electric vehicle charging infrastructure, and any industrial DC power distribution network where high fault current protection and reliable operation are non-negotiable. Trust in Littelfuse's expertise for dependable circuit protection that safeguards your valuable assets and ensures operational continuity.
  • Fast-acting Midget fuse (10x38mm) for high DC voltage applications.
  • 50,000 Ampere DC interruption rating for robust fault protection.
  • Meets UL and IEC photovoltaic fuse standards for solar applications.
  • Available in standard and board-mount configurations for installation flexibility.
  • Wide range of ampere ratings to match specific circuit requirements.

Specifications

Application
Power supplies
Brand Name
Littelfuse
Special Features
Fast Acting Fuses
Standard
UL Listed/CSA Certified
Sub Brand
KLKD Series
Type
10x38 Fuses

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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.