Littelfuse EL731-20-00 - EL731-20-00 is an earth-leakage relay with a supply voltage dc of 24 and measures 1.9H X 3.8W X 5.0D.
Littelfuse

EL731-20-00

Alternate Item Number: EL731-20-00

UPC: 079458977844


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Overview

The Littelfuse EL731-20-00 is a dedicated earth-leakage relay designed for critical industrial safety applications. Operating on a stable 24V DC supply voltage, this unit provides reliable detection of earth leakage currents, a vital function for preventing electrical hazards and ensuring operational continuity in industrial settings. Its compact form factor, measuring 1.9 inches in height, 3.8 inches in width, and 5.0 inches in depth, allows for efficient integration into existing control panels and machinery without occupying excessive space. The EL731-20-00 series is engineered to offer precise monitoring capabilities, contributing to enhanced safety protocols and compliance with relevant industry standards for electrical installations and machinery. This relay is particularly suited for deployment in industrial machinery, power distribution systems, and complex automation processes where early detection of ground faults is paramount. The robust construction of the Littelfuse EL731-20-00 ensures dependable performance even in challenging industrial environments, making it a trusted component for safeguarding personnel and equipment. Its specific application scope includes protecting against insulation failures and preventing potential fire hazards caused by unintended current paths to ground. The 24V DC operating voltage is standard for many control systems, facilitating straightforward integration into existing infrastructure. The Littelfuse EL731-20-00, SKU EL731-20-00, is manufactured in the US, adhering to stringent quality controls. Its primary function is to monitor the residual current between the live conductors and earth, tripping a connected circuit breaker or contactor when a dangerous leakage current is detected. This proactive measure is essential for maintaining a safe working environment and minimizing downtime associated with electrical faults. The compact dimensions (1.9H X 3.8W X 5.0D) are a key design advantage for space-constrained applications. The EL731 series relays are a testament to Littelfuse's commitment to providing reliable protection solutions for industrial electrical systems.
  • 24V DC Supply Voltage for broad compatibility
  • Compact Dimensions: 1.9"H x 3.8"W x 5.0"D for space-efficient installation
  • Reliable Earth Leakage Detection for enhanced safety
  • Designed for Industrial Machinery and Power Distribution
  • Manufactured in the US by Littelfuse

Specifications

Application
NA
Brand Name
Littelfuse
Series
EL731
Size
1.9H X 3.8W X 5.0D
Special Features
Adjustable pickup
Standard
UL, CSA, C-Tick
Sub Brand
EL731 Series
Type
Protection Relay
Voltage Rating
24 V 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.