Littelfuse SPF020HXR - 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

SPF020HXR

Alternate Item Number: 0SPF020.HXR

UPC: 079458175943

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Overview

The Littelfuse SPF020HXR Solar Protection Fuse (SKU: SPF020HXR) represents a critical component in the robust protection of modern photovoltaic (PV) systems. Engineered by Littelfuse, a globally recognized leader in circuit protection, this Midget-style fuse, measuring 10 x 38 mm, is specifically designed to safeguard solar installations from the damaging effects of reverse overcurrent conditions. As the scale and voltage requirements of PV systems continue to escalate, driven by the need to minimize power loss over extensive conductor runs, the demands placed on protection devices have intensified significantly. Standard circuit protection solutions are often inadequate for the unique challenges presented by photovoltaic arrays. The SPF series, including the SPF020HXR, addresses this gap by offering UL Listed protection that can safely interrupt faulted circuits at the higher voltage levels characteristic of contemporary PV systems. This ensures that both PV modules and associated conductors are shielded from potential damage, thereby enhancing system reliability and longevity. The ability to safely interrupt these demanding fault currents is paramount for preventing cascading failures and maintaining the operational integrity of solar farms and distributed generation systems. Littelfuse provides a comprehensive range of ampere ratings within the SPF family, allowing for precise matching to the specific protection requirements of diverse PV applications. Whether for utility-scale solar power plants, commercial rooftop installations, or residential solar arrays, the SPF020HXR offers a dependable solution. Its design prioritizes safety, performance, and compliance with stringent industry standards, making it a trusted choice for solar system designers, installers, and maintenance professionals. Key benefits and features of the Littelfuse SPF020HXR Solar Protection Fuse include: * **Specialized PV Protection:** Specifically developed for the unique demands of photovoltaic systems. * **High Voltage Capability:** UL Listed to safely interrupt circuits at elevated voltage levels common in modern PV arrays. * **Reverse Overcurrent Protection:** Effectively protects PV modules and conductors from damaging reverse current flow. * **Midget Fuse Form Factor:** Compact 10 x 38 mm dimensions facilitate integration into existing or new PV combiner boxes and inverters. * **Wide Ampere Rating Selection:** Multiple ampere ratings available to precisely match application needs and ensure optimal protection. * **Enhanced System Reliability:** Contributes to the overall stability and longevity of solar power generation systems. * **Trusted Manufacturer:** Backed by the expertise and reputation of Littelfuse in circuit protection. Selecting the correct fuse is a crucial step in the design and installation of any PV system. The SPF020HXR offers peace of mind, knowing that a high-quality, purpose-built protection device is in place to mitigate risks associated with electrical faults. Its robust construction and adherence to UL standards underscore its suitability for critical infrastructure applications where performance and safety are non-negotiable. Professionals rely on Littelfuse for solutions that meet and exceed industry expectations, and the SPF020HXR is a testament to this commitment.
  • Designed for photovoltaic (PV) system protection
  • Midget style fuse (10 x 38 mm) for compact integration
  • UL Listed for safe interruption of high-voltage circuits
  • Protects PV modules and conductors from reverse overcurrent
  • Available in multiple ampere ratings for diverse applications

Specifications

Application
1000 VDC PV
Brand Name
Littelfuse
Current Rating
20 A
Series
SPF Solar Protection Fuse
Series
SPF Solar Protection Fuse series
Size
10 x 38 mm
Special Features
Solar
Standard
UL 2579 IEC 60269-6
Sub Brand
SPF Series
Type
Full Range

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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.