Littelfuse LFJ600303C - 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

LFJ600303C

UPC: 079458808810


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Overview

The Littelfuse LFJ600303C DIN Rail releasable fuse block is engineered for optimal performance and reliability in industrial applications. This innovative fuse block features a space-saving design that is up to 45% smaller than existing blocks, making it an ideal choice for installations where space is at a premium. The LFJ600303C is designed for ease of use, allowing for single-handed release from the DIN Rail, which simplifies maintenance and replacement processes. With spring reinforced fuse clips standard on 100A and larger blocks, and optional on 30A and 60A blocks, this product ensures secure connections and enhanced safety. The phenolic blocks are equipped with side barriers for isolation, providing additional protection and reliability in electrical systems. Universal mounting holes facilitate quick and easy replacement, making the LFJ600303C a versatile solution for various applications. Note that indication is offered on all versions except for the 200A-600A models, ensuring users can easily monitor the status of their fuses. Choose the Littelfuse LFJ600303C for a dependable, efficient, and compact fuse solution that meets the demands of modern industrial environments.
  • Space-saving design, 45% smaller than existing blocks
  • Single-handed release from DIN Rail for easy maintenance
  • Spring reinforced fuse clips standard on 100A and larger
  • Phenolic blocks with side barriers for enhanced isolation
  • Universal mounting holes for quick and easy replacement

Specifications

Brand Name
Littelfuse
Material
Phenolic
Mounting Type
DIN Rail
Series
LFJ Series
Size
Up to 45% smaller than existing blocks
Sub Brand
LF Series Fuseblock
Type
Class J Fuseblock
Package Dimensions (L x W x H)
3.5 IN x 4.1 IN x 2.3 IN
Package Dimensions (L x W x H)
8.89 cm x 10.5 cm x 5.842 cm
Package Weight (Imperial)
0.550 L
Package Weight (Metric)
249.480 g
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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.