Littelfuse KLKD02.5H - 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

KLKD02.5H

Alternate Item Number: KLKD02.5H

UPC: 079458964523


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Overview

The Littelfuse KLKD02.5H is a critical component for robust DC circuit protection, engineered for demanding industrial environments. As a fast-acting Midget-style fuse, measuring 10x38 mm, it provides rapid response to overcurrent events, safeguarding sensitive equipment and preventing cascading failures. Its exceptional 50,000 ampere (50kA) DC fault current interrupting rating makes it exceptionally well-suited for applications where high fault currents are a significant concern, such as in solar photovoltaic (PV) systems and other high-power DC circuits. This fuse series is specifically designed to meet the stringent requirements of both UL and IEC photovoltaic fuse standards. This compliance is paramount for solar combiner boxes, where reliable protection against DC faults is essential for system integrity and safety. The KLKD02.5H ensures that your solar installations are protected against potential damage from short circuits or other fault conditions, contributing to system longevity and operational efficiency. Beyond solar applications, the KLKD02.5H finds utility in a broad spectrum of industrial DC circuits requiring high voltage and high interrupting capacity. Its versatility is further enhanced by its availability in both standard and board-mount configurations, offering flexibility for various installation methods and equipment designs. Whether you are integrating protection into a new system or upgrading existing infrastructure, the KLKD02.5H provides a dependable solution. Littelfuse, a globally recognized leader in circuit protection, leverages its extensive expertise to deliver fuses that offer superior performance and reliability. The KLKD series embodies this commitment, providing engineers and system designers with the confidence that their critical DC systems are protected by a product built to the highest industry standards. With a wide array of ampere ratings available within the KLKD family, users can precisely match the fuse's characteristics to the specific protection needs of their application, ensuring optimal safety and operational continuity. Key features and benefits of the Littelfuse KLKD02.5H include: * **Fast-Acting Protection:** Minimizes damage by quickly interrupting overcurrents. * **High DC Fault Current Rating:** Withstands up to 50,000A DC fault currents, crucial for high-power systems. * **Photovoltaic Standards Compliance:** Meets UL and IEC standards for solar applications. * **Midget Style (10x38mm):** Compact form factor suitable for various enclosures and equipment. * **Versatile Configurations:** Available in standard and board-mount options for flexible integration. * **High DC Voltage Capability:** Designed for circuits operating at elevated DC voltages. * **Littelfuse Quality:** Manufactured by a trusted leader in circuit protection, ensuring reliability and performance. Selecting the correct fuse is a vital step in system design. The KLKD02.5H, with its robust specifications and adherence to international standards, offers a compelling choice for engineers and maintenance professionals seeking uncompromising protection for their high-current DC applications.
  • Fast-acting protection for critical DC circuits
  • High 50,000A DC fault current interrupting rating
  • Designed to meet UL and IEC photovoltaic fuse standards
  • 10x38mm Midget style fuse for compact applications
  • Available in standard and board-mount configurations

Specifications

Application
Power supplies
Brand Name
Littelfuse
Mounting Type
Standard and board-mount
Series
KLKD
Size
10x38 mm
Special Features
Fast Acting Fuses
Standard
UL Listed/CSA Certified
Sub Brand
KLKD Series
Type
10x38 Fuses
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.