Varistors meets high DC voltage and surge requirements.

Press Release Summary:

Expanded with models offering continuous voltage ratings from 65–125 Vdc and surge current ratings up to 10 kA (8/20 µsec pulse), LV UltraMOV™ Varistor Series includes models with disc diameters of 5, 7, 10, 14, and 20 mm. Voltage ratings meet requirements for telecommunication applications, while peak surge current rating enhances reliability and extends end product lifetime. Choice of epoxy or phenolic coatings is available, and latter supports operation up to 125°C.

Original Press Release:

Littelfuse Expands Popular LV UltraMOV(TM) Varistor Series to Serve Applications with Higher DC Voltage and Surge Requirements

Most robust surge rating in the smallest footprint (≥40 percent smaller than other solutions)

CHICAGO — Littelfuse, Inc., the global leader in circuit protection, has expanded its popular LV UltraMOV™ Varistor Series to provide solutions for applications with higher DC voltage and surge requirements. This series, introduced to the market in 2013, originally offered continuous voltage ratings from 14VDC to 56VDC with surge current rating of up to 8kA (8/20µs pulse). The expanded line adds higher continuous voltage ratings from 65VDC to 125VDC, and an enhanced surge current rating of up to 10kA (8/20µs pulse). It combines these higher ratings with the smallest footprint on the market by reducing their size by more than 40 percent over competing solutions. The series is available in disc diameters of 5mm, 7mm, 10mm, 14mm and 20mm. The expanded LV UltraMOVTM Varistor Series provides an ideal circuit protection solution for an even wider range of DC voltage applications than the original line. The expanded voltage ratings meet the voltage requirement for all telecommunication applications and the enhanced surge current rating ensures more robust surge protection. Applications include telecom power systems, surge protection devices, wireless base stations, automation controls, audio and video devices, security systems and fire alarm systems.

“The enhanced LV UltraMOVTM Varistor Series provides an ideal circuit protection solution for DC voltage applications,” said Johnny Chang, product manager for the LV UltraMOVTM Series Varistor product line. “The maximum peak surge current can reach up to 10kA to protect against damage from high peak surge current induced by indirect lightning strike interference, system switching and abnormal power surges.”

The latest additions to the LV UltraMOV TM Varistor Series offer these key benefits:

A high peak surge current rating of up to 10kA (8/20µs pulse), which enhances reliability and extends end product lifetime

A reduction in the footprint and volume required to provide surge protection, which frees up board space for other critical components

A choice of epoxy or phenolic coatings. The phenolic coating option supports higher operating temperatures up to 125°C.

A lead-free, halogen-free, and RoHS compliant design enables worldwide compliance to environmental regulations


LV UltraMOV TM Series Varistors are available in bulk, tape and reel, and ammo packaging. Sample requests can be placed through authorized Littelfuse distributors worldwide. For a listing of Littelfuse distributors, please visit

For More Information

Additional information is available on the LV UltraMOV TM Varistor Series product page and datasheet. If you have technical questions, please contact: Johnny Chang, Product Manager, LV UltraMOV TM Series Varistor product line,

About Littelfuse

Founded in 1927, Littelfuse is the world leader in circuit protection with growing global platforms in power control and sensing. The company serves global customers in the electronics, automotive and industrial markets with technologies including fuses, semiconductors, polymers, ceramics, relays and sensors. Littelfuse has over 8,000 employees in more than 35 locations throughout the Americas, Europe and Asia. For more information, please visit the Littelfuse website:

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