Littelfuse SE-704-0T - SE-704-0T is an earth-leakage monitor with a supply voltage dc of 48.
Littelfuse

SE-704-0T

Alternate Item Number: SE-704-0T

UPC: 079458989144


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Overview

The Littelfuse SE-704-0T Earth-Leakage Monitor is a precision-engineered solution designed to safeguard critical industrial electrical systems from ground fault hazards. As part of Littelfuse’s comprehensive portfolio of industrial protection devices, this monitor delivers reliable detection of leakage currents in applications where electrical safety and system integrity are paramount. With a dedicated 48 VDC supply voltage, the SE-704-0T integrates seamlessly into DC-powered installations, including power distribution panels, motor control centers, and renewable energy systems, ensuring continuous monitoring without compatibility concerns. Ground fault detection is essential in environments where even minor leakage currents can escalate into equipment damage, fire risks, or personnel hazards. The SE-704-0T excels in identifying these faults early, enabling proactive maintenance and intervention before issues escalate. Its compact design and robust construction make it suitable for installation in harsh industrial settings, including manufacturing plants, data centers, and utility substations. The monitor’s sensitivity to low-level leakage currents ensures compliance with stringent safety standards, including those outlined by OSHA, IEC, and other regulatory bodies governing electrical safety in industrial applications. Selecting the right earth-leakage monitor requires consideration of supply voltage compatibility, response time, and integration capabilities. The SE-704-0T addresses these needs with a 48 VDC input, aligning with common industrial DC bus voltages and eliminating the need for additional power conversion. Its design emphasizes durability, with reinforced housing and corrosion-resistant components to withstand vibration, temperature extremes, and electromagnetic interference—common challenges in industrial environments. For professionals tasked with system design or retrofitting, the SE-704-0T offers a plug-and-play solution that reduces installation complexity while enhancing overall system reliability. Littelfuse’s reputation as a leader in electrical protection solutions is built on decades of innovation and adherence to industry standards. The SE-704-0T reflects this commitment, offering a balance of performance, ease of use, and long-term dependability. Whether deployed in a new installation or as part of an upgrade to existing infrastructure, this monitor provides peace of mind by ensuring that ground faults are detected promptly and accurately. Trust Littelfuse to deliver monitoring solutions that not only meet but exceed the demands of modern industrial applications.
  • 48 VDC supply voltage for seamless integration into industrial DC systems
  • High-sensitivity detection of leakage currents to prevent equipment damage
  • Compact, durable design for harsh industrial environments
  • Early fault detection enhances safety and reduces downtime
  • Plug-and-play installation with minimal configuration required

Specifications

Application
Industrial
Brand Name
Littelfuse
Special Features
Adjustable Time Delay
Sub Brand
SE 704 Series
Type
Ground Fault Relays
Voltage Rating
48 VDC
Package Dimensions (L x W x H)
4.3 IN x 2.2 IN x 3 IN
Package Dimensions (L x W x H)
10.922 cm x 5.588 cm x 7.62 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.