Littelfuse LFJ601003C - Features and Benefits: Indication offered on all versions except 200A-600A. DIN Rail releasable for all non-knife blade style fuses. Only one hand is required to release from DIN Rail (lock open lock closed). Phenolic blocks have side barriers for isolation. Spring reinforced fuse clips are standard on 100A and larger blocks. Reinforcing springs are optional on 30A and 60A blocks. Universal mounting holes make for easy replacement. Space-saving design — up to 45% smaller than existing blocks.
Littelfuse

LFJ601003C

UPC: 079458808865


Documents & Media
BrochureTechnical BulletinTechnical DrawingSpecification Sheet

Contact for Pricing

Overview

The Littelfuse LFJ601003C DIN Rail Fuse Block represents a significant advancement in industrial fuse protection, engineered for reliability, efficiency, and space optimization. Manufactured by Littelfuse, a globally recognized leader in circuit protection, this model (SKU: LFJ601003C) is designed to meet the demanding requirements of modern electrical systems. Its compact, space-saving design is a standout feature, offering up to 45% reduction in size compared to traditional fuse blocks. This makes it an ideal solution for control panels, power distribution units, and other applications where maximizing usable space is critical. Constructed from high-quality phenolic material, the LFJ601003C provides excellent electrical insulation and thermal resistance, ensuring safe and dependable operation in harsh industrial environments. The integrated side barriers further enhance isolation between fuse clips, mitigating the risk of short circuits and improving overall system safety. For enhanced durability and consistent contact pressure, spring-reinforced fuse clips are standard on blocks rated for 100A and larger. For 30A and 60A blocks, these reinforcing springs are available as an optional upgrade, allowing for customization based on specific application needs. Installation and maintenance are streamlined with the LFJ601003C. It features universal mounting holes, facilitating easy replacement of existing fuse blocks regardless of their original configuration. The DIN Rail releasable mechanism is a key convenience, allowing for quick and effortless removal from the rail with just one hand, whether in a locked open or locked closed position. This feature significantly reduces downtime during maintenance or component replacement. Key features and benefits of the Littelfuse LFJ601003C DIN Rail Fuse Block include: * **Exceptional Space Savings:** Up to 45% smaller footprint than conventional fuse blocks, ideal for dense panel designs. * **Durable Phenolic Construction:** Offers superior insulation, heat resistance, and mechanical strength for long-term reliability. * **Enhanced Safety:** Side barriers provide crucial isolation between fuse clips. * **Robust Fuse Clip Design:** Spring-reinforced clips (standard on 100A+; optional on 30A/60A) ensure secure fuse seating and optimal electrical contact. * **User-Friendly Installation & Maintenance:** Universal mounting holes and a one-hand DIN Rail releasable mechanism simplify integration and servicing. * **Versatile Application:** Suitable for a wide range of industrial power distribution, motor control, and automation systems. This fuse block is an integral component for professionals seeking robust, efficient, and safe circuit protection solutions. Its design prioritizes both performance and ease of use, reflecting Littelfuse's commitment to innovation in electrical safety. The LFJ601003C is a testament to how advanced engineering can lead to more compact, reliable, and cost-effective electrical infrastructure.
  • Space-saving design, up to 45% smaller than existing blocks
  • Durable phenolic construction with side barriers for isolation
  • DIN Rail releasable with one-hand operation (lock open/closed)
  • Universal mounting holes for easy replacement
  • Spring-reinforced fuse clips standard on 100A+ blocks

Specifications

Brand Name
Littelfuse
Connection Type
DIN Rail
Material
Phenolic
Mounting Type
DIN Rail
Mounting Type
DIN Rail, Universal Mounting Holes
Series
LFJ Series
Size
Space-saving (up to 45% smaller than existing blocks)
Size
Up to 45% smaller than existing blocks
Sub Brand
LF Series Fuseblock
Type
Class J Fuseblock
Package Dimensions (L x W x H)
5.6 IN x 5.8 IN x 3 IN
Package Dimensions (L x W x H)
14.224 cm x 14.732 cm x 7.62 cm
Package Weight (Imperial)
2.230 L
Package Weight (Metric)
1011.510 g
NH plastic base Size NH00 1000VAC 1000VDC 160A 2-Pole DIN Rail Connection Screw EP Type

F218758

NH plastic base Size NH00 1000VAC 1000VDC 160A 2-Pole DIN Rail Connection Screw EP Type
POWR-BLOKS power distribution blocks offer a safe, convenient way of splicing cables, providing a fixed junction tap-off point or splitting primary power into secondary circuits. LX2XXX-DIN series offers integral DIN-Rail mount and an optional hinged safety cover.

LD4551-3

POWR-BLOKS power distribution blocks offer a safe, convenient way of splicing cables, providing a fixed junction tap-off point or splitting primary power into secondary circuits. LX2XXX-DIN series offers integral DIN-Rail mount and an optional hinged safety cover.
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.