Littelfuse SPF003H - The SPF Solar Protection Fuse series has been specifically designed for the protection of photovoltaic (PV) systems. This family of Midget style fuses (10 x 38 mm) can safely protect PV modules and conductors from reverseovercurrent conditions. As PV systems have grown in size, so have the corresponding voltage requirements. This increase in system voltage has typically been intended to minimize power loss associated with long conductor runs. Standard circuit protection devices are not designed to completely protect photovoltaic panels. However, the SPF series is UL Listed to safely interrupt faulted circuits up to this demanding voltage level. Littelfuse offers multiple ampere ratings to match specific requirements in a variety of applications.
Littelfuse

SPF003H

Alternate Item Number: 0SPF003.H

UPC: 079458169140

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Overview

The Littelfuse SPF003H Solar Protection Fuse (SKU: SPF003H) is a critical component engineered for the robust protection of photovoltaic (PV) systems. As the solar energy sector continues its rapid expansion, the demands placed on electrical infrastructure, particularly concerning voltage and fault management, have escalated significantly. Standard circuit protection devices are often insufficient to meet the unique challenges presented by modern PV installations. The SPF series, including the SPF003H, has been meticulously designed to address these specific needs, offering superior protection against reverse overcurrent conditions that can compromise the integrity and longevity of PV modules and associated conductors. This Midget-style fuse, measuring 10 x 38 mm, is a testament to Littelfuse's commitment to providing specialized solutions for emerging technologies. Its primary function is to safely interrupt faulted circuits, a crucial capability given the increasing system voltages employed in larger PV arrays. These higher voltages are implemented to minimize power losses over long conductor runs, a common characteristic of utility-scale and commercial solar farms. The SPF003H's UL Listing signifies its adherence to stringent safety standards, ensuring it can reliably interrupt circuits at these demanding voltage levels, thereby safeguarding valuable solar assets and preventing potential hazards. Littelfuse understands that PV system designs vary widely, necessitating a range of protection options. The SPF003H is available in multiple ampere ratings, allowing system designers and installers to precisely match the fuse's capacity to the specific requirements of their application. This granular approach to protection ensures optimal performance and safety without oversizing components unnecessarily. Whether protecting individual PV modules, string combiners, or other critical points within a solar array, the SPF003H offers a dependable and effective solution. Key benefits and features of the Littelfuse SPF003H Solar Protection Fuse include: * **Specialized PV System Protection:** Designed exclusively for photovoltaic applications to prevent damage from reverse overcurrents. * **High Voltage Capability:** UL Listed to safely interrupt faulted circuits at demanding voltage levels common in modern PV systems. * **Midget Style (10 x 38 mm):** Compact form factor suitable for integration into various PV system enclosures and combiners. * **Reliable Reverse Overcurrent Protection:** Ensures the safety and operational continuity of PV modules and conductors. * **Multiple Ampere Ratings:** Available in various current ratings to precisely match application needs and optimize system protection. * **Trusted Manufacturer:** Littelfuse is a globally recognized leader in circuit protection, known for quality and innovation. By selecting the Littelfuse SPF003H, solar system integrators and maintenance professionals can be assured of a high-quality, purpose-built circuit protection device that enhances the safety, reliability, and efficiency of their solar energy installations. Its robust design and adherence to industry standards make it an indispensable component for any professional solar project.
  • Specifically designed for photovoltaic (PV) system protection.
  • Midget style fuse (10 x 38 mm) for compact integration.
  • Safely protects PV modules and conductors from reverse overcurrent conditions.
  • UL Listed to interrupt faulted circuits at demanding high voltage levels.
  • Available in multiple ampere ratings to match specific application requirements.

Specifications

Application
1000 VDC PV
Brand Name
Littelfuse
Series
SPF
Size
10 x 38 mm
Special Features
Solar
Standard
UL 2579 IEC 60269-6
Sub Brand
SPF Series
Type
Full Range
Package Weight (Imperial)
0.015 L
Package Weight (Metric)
7.010 g

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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.