Littelfuse SE-EFVC - Protects the EFCT input on the SE-701, SE-703, MPU-32, and FPU-32 when a current transformer other than the EFCT-1, EFCT-2, or EFCT-26 is used.
Littelfuse

SE-EFVC

Alternate Item Number: SE-EFVC

UPC: 079458989281

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Overview

The Littelfuse SE-EFVC is a specialized ground-fault protection module engineered to safeguard the EFCT input on compatible monitoring systems—including the SE-701, SE-703, MPU-32, and FPU-32—when non-standard current transformers (CTs) are deployed. Designed for industrial environments where precise current measurement and system reliability are critical, the SE-EFVC ensures seamless integration with Littelfuse’s ecosystem while providing robust protection against ground faults, nuisance tripping, and equipment damage. This module is indispensable in applications requiring compliance with stringent safety standards, such as power distribution, motor control centers, and critical infrastructure where unplanned downtime is unacceptable. Ground-fault protection is a cornerstone of modern electrical safety, particularly in systems where even minor leakage currents can escalate into catastrophic failures. The SE-EFVC addresses this challenge by offering adjustable trip level settings (25–500 mA) and trip time delays (instantaneous to 500 ms), allowing engineers to tailor protection to specific system requirements. Its harmonic filtering capability eliminates false trips caused by harmonics, a common issue in industrial environments with variable frequency drives (VFDs) and other non-linear loads. The module’s microprocessor-based design eliminates the need for calibration, reducing maintenance costs and ensuring consistent performance over time. One of the SE-EFVC’s standout features is its dual Form C output contacts, which enable simultaneous operation of annunciation and trip circuits—a critical requirement in safety-critical applications. The contacts can be configured for fail-safe operation (default) or selectable fail-safe/non-fail-safe modes (depending on the model variant), providing flexibility for both undervoltage and overvoltage scenarios. Additionally, the module includes a standard test button for routine diagnostics and a reset button for quick recovery after a fault event. Its non-volatile trip memory retains fault state during power loss, simplifying troubleshooting and reducing downtime. The SE-EFVC is designed for universal compatibility, featuring a 0–5 V analog output that allows integration with optional meters (such as the PGA-0500) or control systems for real-time monitoring. Its conformally coated circuitry enhances durability in harsh industrial environments, while global certifications—including UL Listing (E340889), CSA certification, CE marking, and RCM compliance—ensure seamless deployment across North America, Europe, and Australia. The module supports multiple mounting options, including DIN rail, surface, and panel mounting (with the PMA-55 or PMA-60 adapter), catering to diverse installation requirements. Littelfuse, a trusted name in industrial protection solutions, delivers the SE-EFVC with a 5-year warranty, underscoring its reliability and long-term performance. Whether used in power generation facilities, data centers, or manufacturing plants, this module provides peace of mind by protecting sensitive electronic components from ground faults while maintaining system coordination. Its compatibility with non-standard CTs—such as the EFCT-1, EFCT-2, or EFCT-26—makes it a versatile choice for engineers seeking to retrofit or upgrade existing systems without costly replacements. For professionals prioritizing safety, efficiency, and compliance, the Littelfuse SE-EFVC is the definitive solution for ground-fault protection in modern industrial applications.
  • Adjustable trip level (25–500 mA) and trip time (INST–500 ms) for system coordination
  • Harmonic filtering eliminates nuisance tripping in industrial environments
  • Dual Form C output contacts for annunciation and trip circuits
  • Universal power supply and 0–5 V analog output for monitoring integration
  • Global certifications (UL, CSA, CE, RCM) with 5-year warranty

Specifications

Application
Industrial
Brand Name
Littelfuse
Mounting Type
DIN rail, surface, panel (with adapter)
Poles
2 (form C)
Series
SE
Special Features
High Quality
Sub Brand
Relay Series
Type
Protection Relays and Controls
Package Dimensions (L x W x H)
1.3 IN x 1.8 IN x 2.3 IN
Package Dimensions (L x W x H)
3.302 cm x 4.572 cm x 5.842 cm
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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.