Authorized Littelfuse Distributor
Littelfuse SPF010HXR - 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 SPF010HXR The SPF Solar Protection Fuse series has been specifically designed for the protection…

Alternate Item Number: 0SPF010.HXR

UPC: 079458169300


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Minimum Qty: 100

Multiplier: 100

*Contact for lower quantities*

Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.

Overview

The **Littelfuse SPF010HXR Solar Protection Fuse** is a high-performance Midget-style fuse (10 x 38 mm) engineered specifically for photovoltaic (PV) systems, delivering reliable overcurrent protection in demanding solar applications. As PV installations scale in size and voltage to minimize power loss over long conductor runs, standard circuit protection devices often fail to meet the rigorous demands of modern solar arrays. Unlike conventional fuses, the **SPF010HXR** is **UL Listed** to safely interrupt faulted circuits at elevated voltage levels, ensuring compliance with industry safety standards while safeguarding PV modules and conductors from reverse overcurrent conditions. **Key Features and Benefits:** - **High-Voltage Compliance:** Designed to operate safely in high-voltage PV systems, the SPF010HXR meets the stringent requirements of UL certification for interrupting faulted circuits, providing peace of mind in large-scale solar installations where system voltage can exceed traditional limits. - **Midget-Style Design:** With a compact 10 x 38 mm form factor, this fuse is ideal for space-constrained PV combiner boxes, junction enclosures, and inverter input circuits, ensuring seamless integration into existing solar infrastructure without requiring extensive reconfiguration. - **Reverse Overcurrent Protection:** The SPF010HXR is purpose-built to address the unique challenges of PV systems, where reverse current flow—caused by shading, mismatched modules, or ground faults—can lead to overheating, reduced efficiency, or even fire hazards. By interrupting these conditions promptly, the fuse enhances system longevity and operational safety. - **Multiple Ampere Ratings:** Littelfuse offers the SPF series in a range of ampere ratings, allowing solar installers and engineers to select the optimal protection level for their specific application. Whether protecting individual PV strings, subarrays, or entire solar farms, the SPF010HXR provides tailored solutions to match diverse system requirements. - **Durability and Reliability:** Constructed with high-quality materials and precision engineering, the SPF010HXR delivers consistent performance in harsh environmental conditions, including extreme temperatures, humidity, and UV exposure commonly encountered in outdoor solar installations. **Typical Applications:** The **SPF010HXR** is widely used in residential, commercial, and utility-scale solar PV systems, including: - **PV Combiner Boxes:** Protecting multiple PV strings from overcurrent conditions before they converge in the combiner. - **Inverter Input Circuits:** Safeguarding inverters from reverse current surges that could damage sensitive electronics. - **DC Switchgear:** Ensuring safe operation in direct current (DC) distribution panels where high-voltage conditions are prevalent. - **Energy Storage Systems (ESS):** Providing critical protection in hybrid solar-plus-storage installations where PV arrays interface with battery banks. - **Utility-Scale Solar Farms:** Delivering robust protection for large-scale installations with high system voltages and complex wiring configurations. **Why Choose Littelfuse for Solar Protection?** Littelfuse is a globally recognized leader in circuit protection, with decades of expertise in developing solutions for renewable energy applications. The **SPF series** reflects the company’s commitment to innovation, safety, and reliability, offering solar professionals a trusted choice for protecting PV assets. By selecting Littelfuse, installers and system designers gain access to: - **Proven Performance:** Field-tested and certified to meet international safety standards, ensuring compliance with NEC, IEC, and other regional regulations. - **Technical Support:** Expert guidance from Littelfuse’s engineering team to assist with fuse selection, installation, and troubleshooting. - **Global Distribution:** Reliable supply chains and local availability to support projects of any scale, from small rooftop systems to massive solar farms. **Installation and Selection Considerations:** When specifying the **SPF010HXR** for a PV system, professionals should consider: - **System Voltage:** Ensure the fuse’s UL-rated interrupting capacity aligns with the maximum system voltage (e.g., 1000V or 1500V DC systems). - **Ampere Rating:** Match the fuse rating to the PV string’s short-circuit current (Isc) while accounting for temperature derating and future system expansions. - **Enclosure Compatibility:** Verify the fuse’s dimensions and terminal types are compatible with the combiner box or enclosure being used. - **Maintenance:** While fuses are passive devices, regular inspections of PV system wiring and connections are recommended to prevent faults that could compromise protection. For solar energy professionals seeking a **high-voltage, UL-certified fuse** that delivers **reliable overcurrent protection** in PV systems, the **Littelfuse SPF010HXR** is an industry-proven solution. Engineered for the unique demands of modern solar installations, this Midget-style fuse ensures safety, efficiency, and long-term performance—making it an essential component in any robust PV protection strategy.
  • UL Listed for safe interruption of faulted circuits in high-voltage PV systems
  • Midget-style (10 x 38 mm) design for compact integration in PV combiner boxes
  • Reverse overcurrent protection to prevent overheating and fire hazards
  • Available in multiple ampere ratings for tailored PV system protection
  • Durable construction for harsh outdoor solar environments

Specifications

Application
1000 VDC PV
Brand Name
Littelfuse
Current Rating
10 A
Material
Ceramic/Metal
Mounting Type
Cartridge
Series
SPF Solar Protection Fuse
Size
10 x 38 mm
Special Features
Solar
Standard
UL 2579 IEC 60269-6
Sub Brand
SPF Series
Type
Full Range
Voltage Rating
1500 V DC
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 Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
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 600VAC 600VDC Class CC 30A 3-Pole Pressure Plate with Reinforced Clip

30323R

Fuse Block 600VAC 600VDC Class CC 30A 3-Pole Pressure Plate with Reinforced Clip
9F61 Size B Clips 1.6in

9F61BWW460

9F61 Size B Clips 1.6in
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.

Frequently Asked Questions

What types of fuses does Littelfuse offer for industrial applications?

Littelfuse offers UL Class fuses, high-speed fuses, medium voltage fuses, 10 x 38 mm fuses, and solar fuses for industrial applications.

What are Littelfuse fuse blocks and holders designed for?

Littelfuse fuse blocks and holders are selected by OEMs and designers for their compact designs, indication features, and DIN-rail mounting flexibility.

What do POWR-BLOKS power distribution blocks provide?

POWR-BLOKS power distribution blocks offer a safe and convenient way to splice cables and manage power distribution requirements within panels and systems.

What is the purpose of Littelfuse feeder protection relays?

Feeder protection relays protect circuits from overcurrent, ground faults, phase loss, overload, and other detrimental conditions.

What is the Industrial Shock-Block® GFCI designed for?

The Industrial Shock-Block® GFCI is designed for people protection in industrial facilities and meets UL Standard 943C Class C and Class D.

How do high-resistance grounding systems benefit industrial applications?

High-resistance grounding limits point-of-fault damage and eliminates arc-flash hazards and transit overvoltages associated with ground faults.

What protection do Littelfuse voltage monitors offer?

Voltage monitors provide protection against both supply line and load side faults when the motor is running.

What functions do Littelfuse timers and flashers control?

Timers and flashers delay starting and stopping loads, and control cycling and sequencing of motors, pumps, compressors, heaters, and lighting.

How do Littelfuse arc-flash protection relays enhance safety?

Arc-flash relays detect a developing arc-flash incident and send a trip signal to interrupt power before significant damage occurs.

What types of motor protection does Littelfuse provide?

Littelfuse offers voltage monitors, current monitors, and Bluetooth enhanced overload relays for low and medium voltage motor protection applications.

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.