Littelfuse LFJ102001CST - 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

LFJ102001CST

Alternate Item Number: LFJ102001CST

UPC: 079458795592


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Overview

The Littelfuse LFJ102001CST is a UL 4248-18 Listed fuse block specifically designed for the Littelfuse SPFJ 1000 Vdc Solar Fuse series. This clip-to-stud configuration offers robust overcurrent protection for photovoltaic (PV) systems, meeting critical UL electrical requirements. Engineered for 1000 Vdc applications, it is available in multiple amperage ratings, including 200A, 400A, and 450A, allowing for precise system matching. The LFJ1000 series fuse blocks feature a narrow width for increased space savings within electrical panels. Termination options include box lug and stud mount, providing flexibility for various wiring configurations. The box lug style accommodates a wide range of cable sizes, and the approval for use with copper or aluminum lugs further enhances design flexibility. Key specifications include a 1000 Vdc voltage rating and a UL94 V-0 flammability rating for the thermoplastic base. The fuse clips are made from tin-plated copper alloy, while box lugs are aluminum and fuse studs are zinc-plated steel. This fuse block is RoHS compliant and designed for reliable operation in demanding solar environments. It is ideal for use in solar PV arrays, combiner boxes, and inverter inputs, ensuring protection against overcurrent conditions. The LFJ102001CST is part of Littelfuse's comprehensive solar protection solutions, known for their quality and adherence to industry standards. The specific ordering number LFJ102001CST corresponds to the 200A, clip-to-stud configuration with a 20 kA withstand rating, designed for wire ranges from 250 kcmil to #6 AWG (127mm² to 16mm²), with a recommended torque of 200 in-lb (22.6 N-m). It supports a maximum busbar thickness of 0.774" (19.66 mm) and utilizes 1/4" or 5/16" terminal bolt sizes with specific torque recommendations. This product is manufactured in Mexico.
  • Designed for Littelfuse SPFJ 1000 Vdc Solar Fuses
  • UL 4248-18 Listed for safety and compliance
  • 1000 Vdc voltage rating for high-voltage solar applications
  • Clip-to-stud termination configuration
  • Available in multiple amperages (200A, 400A, 450A) for system flexibility

Specifications

Brand Name
Littelfuse
Current Rating
Multiple Amperages Available
Material
Durable Construction (UV-resistant, temperature fluctuation resistant)
Mounting Type
Fuse Block
Series
SPFJ
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)
1.800 L
Package Weight (Metric)
0.817 kg
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.

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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.
LPHV003 is a midget fuse holder constructed of thermoplastic material designed to house 1000 V dc fuses with a maximum ampere rating of 30.

LPHV003

LPHV003 is a midget fuse holder constructed of thermoplastic material designed to house 1000 V dc fuses with a maximum ampere rating of 30.
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.

LFJ104501STST

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.
Safe distribution of power to multiple fuse holders in a compact design is a key objective for panel designers. The Littelfuse UL508 bus bar system eliminates most wire terminations in a time saving package. A power distribution block and associated conductors are no longer needed to feed multiple POWR-SAFE™ fuse holders. Features/Benefits: Decreases wiring terminations; Small footprint reduces space requirements; Reduces assembly time; Prevents accidental finger exposure; Quick and safe method of changing fuse holder configurations; Allows for future expansion; Improves troubleshooting; Eliminates power distribution block; RoHS compliant and lead (Pb) free. Customization: This product is simple to integrate into one- and three-phase applications. It offers multiple pole configurations and amperage ratings to match the designer’s requirements. Instructions are included for bus bar cutting by the customer for further customization. Individual power feed lugs are available which allow termination at any point along the bus bar.

BB17

Safe distribution of power to multiple fuse holders in a compact design is a key objective for panel designers. The Littelfuse UL508 bus bar system eliminates most wire terminations in a time saving package. A power distribution block and associated conductors are no longer needed to feed multiple POWR-SAFE™ fuse holders. Features/Benefits: Decreases wiring terminations; Small footprint reduces space requirements; Reduces assembly time; Prevents accidental finger exposure; Quick and safe method of changing fuse holder configurations; Allows for future expansion; Improves troubleshooting; Eliminates power distribution block; RoHS compliant and lead (Pb) free. Customization: This product is simple to integrate into one- and three-phase applications. It offers multiple pole configurations and amperage ratings to match the designer’s requirements. Instructions are included for bus bar cutting by the customer for further customization. Individual power feed lugs are available which allow termination at any point along the bus bar.
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LSCR102

Littelfuse LSCR Series is a comprehensive line of modular fuse blocks, designed to accommodate a wide range of High-Speed and UL Power Fuses. These LSCR Series blocks have modular stud type design that enables easy mounting in panel boards. LSCR Series blocks are CE Certified and RoHS Compliant. Features and Benefits: Modular design reduces inventory requirements; Sold in pairs for convenience; Supplied with nut and belleville washer; Constructed of molded phenolic (with plated steel studs) provide greater heat dissapation.
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LFPSC0002ZXID

The Littelfuse LFPSC fuse holder is designed to hold Class CC fuses. Features/Benefits: Finger-Safe design offers personnel protection; Compact design; 35 mm DIN Rail Mountable; No fuse pullers or tools required for fuse removal; Indication option available.
The Littelfuse LFPSC fuse holder is designed to hold Class CC fuses. Features/Benefits: Finger-Safe design offers personnel protection; Compact design; 35 mm DIN Rail Mountable; No fuse pullers or tools required for fuse removal; Indication option available.

LFPSC0001Z

The Littelfuse LFPSC fuse holder is designed to hold Class CC fuses. Features/Benefits: Finger-Safe design offers personnel protection; Compact design; 35 mm DIN Rail Mountable; No fuse pullers or tools required for fuse removal; Indication option available.
The Littelfuse LFPSC fuse holder is designed to hold Class CC fuses. Features/Benefits: Finger-Safe design offers personnel protection; Compact design; 35 mm DIN Rail Mountable; No fuse pullers or tools required for fuse removal; Indication option available.

LFPSC0003Z

The Littelfuse LFPSC fuse holder is designed to hold Class CC fuses. Features/Benefits: Finger-Safe design offers personnel protection; Compact design; 35 mm DIN Rail Mountable; No fuse pullers or tools required for fuse removal; Indication option available.
LPHV004 is a midget fuse holder constructed of thermoplastic material designed to house 1000 V dc fuses with a maximum ampere rating of 30.

LPHV004

LPHV004 is a midget fuse holder constructed of thermoplastic material designed to house 1000 V dc fuses with a maximum ampere rating of 30.
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.

LFJ104501C

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.
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.

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.
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.

LFJ102001STST

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.

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.