Littelfuse LFD1400-3 - 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.
Littelfuse

LFD1400-3

Alternate Item Number: LFD14003Z

UPC: 079458944099

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Overview

The Littelfuse LFD1400-3 POWR-BLOKS power distribution block (LX2XXX-DIN series) is a high-current DIN-Rail mounted solution for secure cable splicing, fixed junction tap-off points, and primary-to-secondary circuit splitting in industrial power distribution systems. Rated for 1400A continuous current and 600V AC/DC, this block meets UL 1059, UL 508, and IEC 60947-7-1 standards, ensuring compliance with stringent safety and performance requirements. The integral 35mm DIN-Rail mount (EN/IEC 60715 compliant) enables rapid panel integration, while nickel-plated copper terminals provide superior corrosion resistance and long-term conductivity. The polycarbonate housing, rated UL 94 V-0, delivers flame retardancy and durability in harsh environments. Designed for versatility, the LFD1400-3 supports wire ranges from 10–125mm² for main circuits and 1.5–35mm² for tap-offs, accommodating up to 4/0 AWG (120mm²) conductors. Main connections use M8 bolts with 20Nm tightening torque, while tap-off connections use M5 bolts with 3.5Nm torque, ensuring secure, vibration-resistant terminations. An optional hinged safety cover (LFD1400-3C) enhances protection against accidental contact and short circuits, meeting modern safety standards. Ideal for control panels, automation systems, motor control centers, and industrial machinery, the LFD1400-3 consolidates multiple connections into a single, organized block. This reduces wiring complexity, simplifies troubleshooting, and minimizes maintenance downtime. The block is tested to IEC 60068-2-30 (humidity) and IEC 60068-2-14 (thermal shock) standards, guaranteeing reliable operation in challenging conditions. With a UNSPSC code of 39121629 and manufactured in the US, the LFD1400-3 is a dependable choice for engineers and technicians requiring high-current, high-voltage power distribution in industrial applications.
  • 1400A current rating with 600V AC/DC voltage compatibility
  • 35mm DIN-Rail mount (EN/IEC 60715 compliant) for quick panel integration
  • Supports main circuits (10–125mm²) and tap-offs (1.5–35mm²)
  • Nickel-plated copper terminals and UL 94 V-0 polycarbonate housing
  • UL 1059, UL 508, IEC 60947-7-1 certified with optional hinged safety cover

Specifications

Application
Anywhere power needs to be distributed to more than 1 load
Brand Name
Littelfuse
Connection Type
Screw Terminal (M8/M5 bolts)
Current Rating
1400 A
Material
High-quality materials
Material
Nickel-plated copper, polycarbonate
Mounting Type
DIN-Rail
Mounting Type
DIN-Rail Mount (35mm EN/IEC 60715 compliant)
Series
LX2XXX-DIN
Series
POWR-BLOKS LX2XXX-DIN
Size
Supports up to 4/0 AWG (120mm²)
Standard
Ul Regonized CSA Certified
Sub Brand
POWR-BLOKS
Voltage Rating
600 V AC/DC
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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. Applications: Typical applications include heating, air conditioning and refrigeration systems, elevator systems, material handling equipment, control panels, motor controls, switchgear, and anywhere power needs to be distributed to more than one load.

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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. Applications: Typical applications include heating, air conditioning and refrigeration systems, elevator systems, material handling equipment, control panels, motor controls, switchgear, and anywhere power needs to be distributed to more than one load.
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The Littelfuse 600 V Class J blocks offer generous space savings and enhanced value over previous generations, such as indication, snap-to-release DIN-rail mounting and universal mounting holes.

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The Littelfuse 600 V Class J blocks offer generous space savings and enhanced value over previous generations, such as indication, snap-to-release DIN-rail mounting and universal mounting holes.

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The Littelfuse 600 V Class J blocks offer generous space savings and enhanced value over previous generations, such as indication, snap-to-release DIN-rail mounting and universal mounting holes.
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1PH9P25MM is a compact-sized POWR Busbar system that provides safe distribution of electrical power to multiple dead front fuse holders and measures 159 mm in length, which can be cut down to an optimal size. See datasheet for more detailed specifications.

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.