Littelfuse LFJ600603C - 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

LFJ600603C

UPC: 079458808841


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Overview

The Littelfuse LFJ600603C DIN Rail Fuse Block is a compact, high-reliability solution for industrial electrical protection, designed to optimize space and simplify maintenance in high-demand applications. Constructed from durable phenolic material, this fuse block features side barriers for enhanced isolation and protection against electrical faults. Its space-saving design reduces installation footprint by up to 45% compared to conventional fuse blocks, making it ideal for compact control panels and power distribution systems where space efficiency is critical. The LFJ600603C supports DIN Rail mounting with a one-handed release mechanism, allowing quick and easy access for fuse replacement or maintenance without tools. This releasable design locks in both open and closed positions, ensuring secure operation during normal use while enabling rapid intervention when needed. Spring-reinforced fuse clips are standard on 100A and larger blocks, providing secure connections and reducing the risk of loose contacts or intermittent failures. For 30A and 60A blocks, reinforcing springs are available as an optional feature to enhance reliability in demanding environments. Universal mounting holes facilitate seamless integration into existing systems, enabling straightforward replacement of older fuse blocks without modifications to panel layouts. The LFJ600603C is compatible with non-knife blade style fuses and is engineered for use in industrial control panels, motor drives, power distribution units, and other high-current applications requiring dependable overcurrent protection. With a focus on durability, ease of use, and space efficiency, this fuse block delivers a practical solution for modern electrical protection needs.
  • Phenolic material construction with side barriers for electrical isolation
  • Space-saving design reduces installation footprint by up to 45%
  • One-handed DIN Rail releasable mechanism for quick fuse replacement
  • Spring-reinforced fuse clips standard on 100A+ blocks (optional on 30A/60A)
  • Universal mounting holes enable easy replacement of existing blocks

Specifications

Brand Name
Littelfuse
Sub Brand
LF Series Fuseblock
Type
Class J Fuseblock
Package Dimensions (L x W x H)
5 IN x 4.4 IN x 2.5 IN
Package Dimensions (L x W x H)
12.7 cm x 11.176 cm x 6.35 cm
Package Weight (Imperial)
1.000 L
Package Weight (Metric)
453.590 g
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BB18

BB18 is a three-phase busbar terminal power feed lug, which is intended for use with LPSM/LPSC series fuse holders. See datasheet for more detailed specifications.
D4/8.SFT2.I.ADO

1SNA399777R1200

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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.