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The ABCs of MOVs

From Littelfuse, Inc.
 

 
The material in this guide has been arranged in 3 parts for easy reference; Section A, Section B and Section C. "A" is for Applications This section provides general guidelines on what types of MOV products are best suited for particular environments. "B" is for Basics This section explains what Metal Oxide Varistors are, and the basic function they perform. "C" is for Common Questions This section helps clarify important information about MOVs for the design engineer, and answers questions that are asked most often. Want to know more? For a copy of the latest Littelfuse MOV data book, please contact your local Littelfuse sales representative. Also available is the companion document "The ABC's of Multilayer Suppressors", AN9671. For technical assistance, call 1-800-999-9445 (US) or visit us on the World Wide Web at http://www.littelfuse.com/
Products & Services
Fuses protect electrical devices and components from overcurrents and short circuits that occur in improperly operating circuits. Search by Specification | Learn more about Fuses
Circuit breakers are mechanical switching devices capable of breaking currents under specified abnormal circuit conditions. Search by Specification | Learn more about Circuit Breakers
Ground fault relays protect electrical equipment from ground faults. A ground fault is an unintentional current path between a current-carrying conductor and a grounded surface. Search by Specification | Learn more about Ground Fault Relays
Ground fault circuit interrupters (GFCI) disconnect a circuit when the current between the neutral conductor and the live conductor becomes unbalanced. GFCIs are also known as residual current devices. Search by Specification | Learn more about Ground Fault Circuit Interrupters (GFCI)
Fuse holders are devices for containing, protecting and mounting fuses. Blown fuses can be changed quickly and easily when used in conjunction with a fuse holder. Search by Specification | Learn more about Fuse Holders
Product Announcements
Hitech (HK) Co., Ltd. - Metal Oxide Varistors (MOVs)
Metal Oxide Varistors (MOVs) UL Certification for our GDT and MOV. (read more)
Emerson Network Power - Surge Protection - Newly Designed Highway Lighting Protector
Edco SHAS Series Newly Designed Highway Lighting Protector The Edco SHAS Series provides surge protection for 120V, 240V, and 480V single phase highway lighting and street pole applications. This... (read more)
Littelfuse, Inc. - Ultra MOV 25S Varistor Series
The new varistor series withstands peak surge current up to 22 kA at single 8/20 µs pulse and can protect against lightning striking interference and abnormal power source. (read more)
Littelfuse, Inc. - SM7 Series Surface Mount MOV
Its surface mount packaging, reflow solderability, high operating voltage and halogen-free features make it incomparable to other offerings in the market... (read more)
Littelfuse, Inc. - Complete Line of Protection Relay Products
New line includes Ground Fault Protection Relays, Motor Protection Relays, Feeder Protection Relays, Resistance Grounding Systems, and Supplemental Monitoring products. (read more)
Hitech (HK) Co., Ltd. - Single Pole SPD
In according with UL1449 3rd & IEC61643-1:2005 Imax 400KA In 200KA Iimp100KA Up< 1.5KV at 1.2/50 IP20 Long life. (read more)
Littelfuse, Inc. - SP3050 Series-Surge/Lightning Protection Array
Newest addition to the SPATM portfolio is designed to suppress large surge/lightning transients per IEC61000-4-5 with just 2pF of total capacitance. (read more)
Ferraz Shawmut - Thermally Protected MOV from Ferraz Shawmut
The Ferraz Shawmut Thermally Protected MOV has been developed to assist in minimizing the failure characteristics of Metal-Oxide-Varistors. The TPMOV is a completely fail-safe device. It is composed... (read more)
Littelfuse, Inc. - SP1003 Series- High-Level ESD and Surge Protection
Newest addition to the Littelfuse SPATM Silicon Protection Array portfolio is the first 0402 size discrete device for applications where high level protection and small size are priority. (read more)
 
Topics of Interest
This guide is similar to "The ABCs of MOVs", offering specific information on Multilayer suppressor device technology and is intended to be a supplement to the Littelfuse Multilayer data sheets. As... (Read More)
Littelfuse offers specific Varistors and Classes of Fuses to address over-voltage and over-current transients in the Industrial environment. This application area is typically characterized as AC... (Read More)
Metal Oxide Varistors (MOVs) are commonly used to suppress transients in many applications such as: Transient Voltage Surge Suppressors (TVSS), Uninterruptible Power Supplies (UPS), AC Power Taps, AC... (Read More)
Transient voltage surge suppressors (TVSSs) using MOV technology are widely used to protect power systems and components against the effects of transient overvoltages. However MOVs can fail... (Read More)
Littelfuse produces four families of multilayer suppressors: the ML, MLE, MLN and AUML. While much of the information presented here is generic to all four, this note focuses on the ML version. Modern... (Read More)
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