Littelfuse EL731-03-00 - EL731-03-00 is an earth-leakage relay with a supply voltage ac of 120–240 and a supply voltage dc of 120–240. Communications is offered via EtherNet-IP™.
Littelfuse

EL731-03-00

Alternate Item Number: EL731-03-00

UPC: 079458977776


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Overview

The Littelfuse EL731-03-00 Earth-Leakage Relay (SKU: EL731-03-00) stands as a critical component in modern industrial electrical safety systems. Engineered by Littelfuse, a recognized leader in circuit protection, this relay provides advanced detection and protection against dangerous earth faults, safeguarding both personnel and sensitive equipment. Its robust design ensures reliable performance in demanding industrial environments. This earth-leakage relay features a highly versatile supply voltage range, accommodating both 120–240 VAC and 120–240 VDC. This flexibility makes the EL731-03-00 suitable for a broad spectrum of power systems found in manufacturing plants, automation facilities, and power distribution networks. The ability to operate on either AC or DC power sources simplifies installation and integration into existing infrastructure, reducing the need for specialized power supplies. A standout feature of the EL731-03-00 is its integrated EtherNet-IP™ communication capability. This industrial Ethernet protocol allows for seamless integration into supervisory control and data acquisition (SCADA) systems and programmable logic controllers (PLCs). Through EtherNet-IP™, users can achieve real-time monitoring of relay status, fault data, and diagnostic information. Remote configuration and control further enhance operational efficiency, enabling proactive maintenance and rapid response to potential issues. This connectivity is paramount for smart manufacturing and Industry 4.0 initiatives, where data-driven decision-making is essential. Key benefits and applications of the Littelfuse EL731-03-00 include: * **Enhanced Safety:** Detects and responds to ground faults, preventing electrical shock hazards and mitigating fire risks. * **Equipment Protection:** Minimizes damage to machinery and electrical components caused by abnormal current leakage. * **System Uptime:** Reduces unplanned downtime by providing early warning and rapid fault isolation. * **Versatile Power Compatibility:** Operates across a wide AC and DC voltage range (120–240V). * **Advanced Connectivity:** EtherNet-IP™ enables easy integration into industrial networks for monitoring and control. The EL731-03-00 is an ideal choice for critical applications such as motor control centers, pump stations, conveyor systems, and any industrial process where reliable earth-leakage protection is non-negotiable. Littelfuse's commitment to quality and innovation ensures that the EL731-03-00 is a dependable and effective solution for your most demanding safety requirements. Its UNSPSC code is 39122331, classifying it within the electrical relays product category.
  • Littelfuse EL731-03-00 Earth-Leakage Relay for industrial safety.
  • Versatile 120–240 VAC and 120–240 VDC supply voltage.
  • Integrated EtherNet-IP™ communication for network integration.
  • Provides critical protection against earth faults.
  • Ideal for manufacturing, automation, and power distribution applications.

Specifications

Application
NA
Brand Name
Littelfuse
Communication Interface
EtherNet-IP
Series
EL731
Special Features
Adjustable pickup
Standard
UL, CSA, C-Tick
Sub Brand
EL731 Series
Type
Protection Relay
Voltage Rating
120–240 VAC / 120–240 VDC
Voltage Rating
120-240 VAC/DC
Package Dimensions (L x W x H)
5 IN x 3.8 IN x 1.9 IN
Package Dimensions (L x W x H)
12.7 cm x 9.652 cm x 4.826 cm
Package Weight (Imperial)
1.100 L
Package Weight (Metric)
0.500 kg
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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.