Littelfuse SE-325ENT - SE-325ENT is a neutral-grounding resistor monitor with a supply voltage of 240 ac and a ground-fault trip level of 0.5–4.0 A.
Littelfuse

SE-325ENT

Alternate Item Number: SE-325ENT

UPC: 079458988185


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Overview

The Littelfuse SE-325ENT neutral-grounding resistor monitor is a critical safety device engineered to protect industrial electrical systems from ground-fault hazards. Designed for applications where ungrounded or high-resistance grounded systems require precise monitoring, this monitor ensures continuous oversight of neutral-grounding resistor performance. With a supply voltage rating of 240 VAC and an adjustable ground-fault trip level ranging from 0.5 to 4.0 A, the SE-325ENT delivers reliable detection tailored to your system’s requirements. Ground faults represent one of the most common yet dangerous electrical faults in industrial environments, capable of causing equipment damage, operational downtime, and even catastrophic failures. The SE-325ENT addresses this risk by providing real-time monitoring of neutral-grounding resistor integrity, enabling rapid response to ground-fault conditions before they escalate. Its robust design and accurate sensing capabilities make it ideal for critical applications across manufacturing, power distribution, renewable energy integration, and industrial automation. Key features of the SE-325ENT include a wide trip-level adjustment range, ensuring compatibility with diverse system configurations and grounding strategies. The device is engineered to meet stringent safety standards, including UL and IEC compliance, providing peace of mind in high-stakes environments. Installation is straightforward, with clear terminal markings and compatibility with standard industrial enclosures. For professionals seeking a dependable solution to ground-fault protection, the SE-325ENT offers a balance of precision, durability, and ease of integration. Littelfuse, a global leader in circuit protection and electrical safety solutions, brings decades of expertise to the SE-325ENT. Known for innovation and reliability, Littelfuse products are trusted by engineers and maintenance teams worldwide to safeguard critical infrastructure. Whether deployed in a manufacturing plant, data center, or utility substation, the SE-325ENT ensures consistent performance and enhanced safety, reducing the risk of costly downtime and equipment failure. Selecting the right neutral-grounding resistor monitor involves evaluating trip-level ranges, supply voltage compatibility, and environmental durability. The SE-325ENT excels in all these areas, offering a versatile solution for systems requiring 240 VAC operation and adjustable ground-fault thresholds. Its compact footprint and rugged construction make it suitable for both indoor and outdoor installations, while its low maintenance requirements ensure long-term reliability. For industries where electrical safety is non-negotiable, the Littelfuse SE-325ENT stands as a trusted choice.
  • 240 VAC supply voltage compatibility for industrial systems
  • Adjustable ground-fault trip level: 0.5–4.0 A for flexible protection
  • Real-time monitoring of neutral-grounding resistor integrity
  • Meets UL and IEC safety standards for critical applications
  • Compact, durable design for indoor/outdoor installations

Specifications

Application
Mining
Brand Name
Littelfuse
Current Rating
0.5–4.0 A
Series
SE-325ENT
Special Features
Continuous NGR monitoring
Sub Brand
SE 325 Series
Type
Trailing Cable Protection
Voltage Rating
240 Vac
Package Weight (Imperial)
1.980 L
Package Weight (Metric)
0.900 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.