Littelfuse SE-330-23-01 - SE-330-23-01 is an advanced ground-fault and neutral-grounding resistor monitor with a supply voltage ac of 28–52 and a supply voltage dc of 36–72. Network communications is offered via USB; Ethernet (Dual RJ45).
Littelfuse

SE-330-23-01

Alternate Item Number: SE-330-23-01

UPC: 079458988567


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Overview

The Littelfuse SE-330-23-01 is a state-of-the-art ground-fault and neutral-grounding resistor monitor engineered to deliver unparalleled protection in industrial power distribution systems. Designed for mission-critical applications, this advanced monitor provides continuous surveillance of ground-fault conditions and neutral-grounding resistor integrity, ensuring operational safety and system reliability. With a versatile supply voltage range of 28–52 VAC and 36–72 VDC, the SE-330-23-01 seamlessly integrates into a wide array of power systems, including industrial facilities, data centers, renewable energy installations, and commercial buildings. This monitor excels in environments where electrical safety and fault detection are non-negotiable. Its robust design incorporates dual RJ45 Ethernet ports and USB connectivity, enabling flexible network integration for real-time monitoring, diagnostics, and remote access. The Ethernet dual-port configuration supports daisy-chaining or direct network connections, while the USB interface facilitates local configuration and firmware updates. These communication capabilities allow maintenance teams to proactively identify potential issues, reducing downtime and enhancing system uptime. The SE-330-23-01 is particularly well-suited for applications requiring compliance with stringent safety standards, such as NFPA 70E, IEC 60364, and OSHA regulations. It is ideal for use in medium-voltage switchgear, motor control centers, transformers, and other critical infrastructure where ground-fault detection is essential to prevent arc flash hazards and equipment damage. The monitor’s ability to detect ground-fault currents as low as 30mA makes it a preferred choice for systems where even minor faults can escalate into catastrophic failures. Installation is straightforward, with the monitor designed for DIN rail mounting or panel mounting, depending on system requirements. Its compact form factor and clear LED indicators provide immediate visual feedback on system status, fault conditions, and communication health. The SE-330-23-01 also supports Modbus TCP and other industrial protocols, ensuring compatibility with existing SCADA and building management systems for centralized monitoring. Littelfuse, a global leader in circuit protection and electrical safety solutions, has built a reputation for reliability and innovation. With over a century of expertise, Littelfuse delivers products that meet the demands of modern industrial environments, where precision, durability, and compliance are paramount. The SE-330-23-01 exemplifies this commitment, offering a robust solution for professionals who require dependable ground-fault and neutral-grounding resistor monitoring in their power systems. Whether deployed in a new installation or as part of an upgrade to an existing system, this monitor provides the peace of mind that comes from knowing your electrical infrastructure is protected by industry-leading technology.
  • Dual RJ45 Ethernet & USB connectivity for real-time monitoring and diagnostics
  • Wide supply voltage range: 28–52 VAC / 36–72 VDC for flexible system integration
  • Compact DIN rail or panel-mount design with clear LED status indicators
  • Supports Modbus TCP and industrial protocols for SCADA compatibility
  • Engineered for compliance with NFPA 70E, IEC 60364, and OSHA safety standards

Specifications

Application
Low- and medium-voltage transformers and generators
Brand Name
Littelfuse
Special Features
Continuous NGR monitoring
Sub Brand
SE 330 Series
Type
Neutral-grounding resistor monitor
Package Dimensions (L x W x H)
5.8 IN x 3.9 IN x 8.4 IN
Package Dimensions (L x W x H)
14.732 cm x 9.906 cm x 21.336 cm
Package Weight (Imperial)
4.400 L
Package Weight (Metric)
2.000 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.