Littelfuse LFJ104001C - The LFJ1000 solar fuse block is specifically designed for the Littelfuse SPFJ 1000 Vdc Solar Fuse. It meets UL electrical characteristic requirements and is available in multiple amperages.
Littelfuse

LFJ104001C

Alternate Item Number: LFJ104001C

UPC: 079458950090


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Overview

The **Littelfuse LFJ1000 Solar Fuse Block** (SKU: LFJ104001C) is a high-performance, UL-certified solution engineered specifically for the **Littelfuse SPFJ 1000 Vdc Solar Fuse**, delivering unmatched reliability and safety in solar power systems. Designed to meet stringent UL electrical characteristic requirements, this fuse block ensures compliance with industry standards while providing robust protection against overcurrent conditions in photovoltaic (PV) installations. The LFJ1000 series is built to withstand the rigors of outdoor solar environments, offering exceptional durability and long-term performance in extreme temperatures, UV exposure, and high humidity. One of the standout features of the LFJ1000 Solar Fuse Block is its **versatility in amperage options**, allowing solar professionals to select the optimal rating for their specific application—whether for residential rooftop systems, commercial solar farms, or utility-scale installations. The fuse block’s modular design simplifies installation and maintenance, reducing downtime and operational costs. Its **high dielectric strength** and **arc-resistant construction** minimize the risk of electrical faults, ensuring continuous operation even in demanding conditions. **Key applications** for the LFJ1000 include: - **String inverters and combiner boxes** in PV systems - **DC side protection** for solar arrays and battery storage systems - **Ground-mounted and rooftop solar installations** - **Utility-scale solar farms** requiring high-voltage DC protection - **Off-grid and hybrid solar systems** with critical uptime requirements Littelfuse, a global leader in circuit protection and power management solutions, has designed the LFJ1000 with **industry-best practices** in mind. The company’s decades of expertise in fuse technology ensure that this product meets the highest standards for safety, efficiency, and longevity. Professionals in the solar industry trust Littelfuse for its **proven reliability** and **comprehensive product support**, from technical documentation to global distribution networks. **Installation and compatibility** are streamlined with the LFJ1000, as it is engineered to integrate seamlessly with the **SPFJ 1000 Vdc Solar Fuse**, a widely adopted solution in the solar market. The fuse block’s **compact footprint** and **easy-access terminals** make it ideal for tight spaces, while its **corrosion-resistant materials** ensure long-term performance in coastal or industrial environments. For solar installers and engineers, the LFJ1000 provides peace of mind, knowing that their systems are protected by a product that adheres to **UL 2579** and other critical safety certifications. When selecting a solar fuse block, factors such as **voltage rating, amperage range, environmental durability, and compliance with local codes** are paramount. The LFJ1000 excels in all these areas, making it a **preferred choice** for solar OEMs, EPCs (Engineering, Procurement, and Construction firms), and maintenance teams. Its **high interrupting rating** and **low power dissipation** contribute to overall system efficiency, reducing energy losses and heat generation. Littelfuse’s commitment to innovation is evident in the LFJ1000’s design, which incorporates **advanced materials** and **precision engineering** to deliver consistent performance across a wide range of operating conditions. Whether deployed in **desert climates with extreme heat** or **northern regions with freezing temperatures**, this fuse block maintains its integrity, ensuring uninterrupted solar power generation. For solar professionals seeking a **trusted, high-quality fuse block** that combines **safety, durability, and flexibility**, the Littelfuse LFJ1000 Solar Fuse Block stands out as a top-tier solution. Its **UL certification**, **multi-amperage availability**, and **industry-leading manufacturer support** make it an essential component in modern solar PV systems.
  • UL-certified for compliance with solar industry standards
  • Designed for Littelfuse SPFJ 1000 Vdc Solar Fuse compatibility
  • Available in multiple amperage ratings for flexible system design
  • Built to withstand harsh outdoor environments (UV, humidity, temperature extremes)
  • High dielectric strength and arc-resistant construction for enhanced safety
  • Modular design simplifies installation and maintenance in PV systems
  • Corrosion-resistant materials for long-term reliability in coastal/industrial areas
  • Compact footprint ideal for tight installation spaces in solar arrays
  • Low power dissipation improves overall system efficiency
  • Trusted by solar OEMs, EPCs, and maintenance teams worldwide

Specifications

Brand Name
Littelfuse
Material
Corrosion-resistant materials
Series
LFJ1000
Special Features
Space-saving DIN Rail Indication
Standard
UL Listed CSA Certified
Sub Brand
LF Series Fuseblock
Type
Class J Fuseblock
Voltage Rating
1000 Vdc
Package Weight (Imperial)
2.805 L
Package Weight (Metric)
1275.000 g
Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8

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Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8
The LFJ1000 solar fuse block is specifically designed for the Littelfuse SPFJ 1000 Vdc Solar Fuse. It meets UL electrical characteristic requirements and is available in multiple amperages.

LFJ102001C

The LFJ1000 solar fuse block is specifically designed for the Littelfuse SPFJ 1000 Vdc Solar Fuse. It meets UL electrical characteristic requirements and is available in multiple amperages.
D4/8.SFT2.I.ADO

1SNA399777R1200

D4/8.SFT2.I.ADO

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.