New LST Varistors are UL1449 Listed

Press Release Summary:

  • Constructed with thermally protected varistor technology (TMOV)
  • Incorporate built-in thermal disconnect function and electric arc shield
  • Provide robust protection to prevent catastrophic failure and fire hazard

Original Press Release:

Make Your Surge Protective Devices More Robust with LST Varistors Featuring Littelfuse TMOV Technology

Ideal for Type 1 and Type 2 SPD devices used in Residential, Commercial, and Industrial applications

CHICAGO, March 2, 2021 Littelfuse, Inc. (NASDAQ: LFUS) an industrial technology manufacturing company empowering a sustainable, connected, and safer world, introduced LST Varistor series. Constructed with a proprietary thermally protected varistor technology (TMOV) developed by Littelfuse, this new varistor incorporates both a built-in thermal disconnect function and electric arc shield. This combination provides additional robust protection to prevent catastrophic failure and fire hazard even under the extreme circumstances of abnormal overvoltage conditions or varistor end-of-life.

It is specifically designed for Type 1 and Type 2 Surge Protective Devices (SPDs) used in markets and applications including:

  • Residential, Commercial, and Industrial buildings
  • Uninterruptable Power Supply (UPS)
  • Industrial motor control
  • Renewable energy
  • HVAC system

“The LST Varistor provides several advantages when compared to other technologies on the market,” sat Littelfuse. “By incorporating the LST in your latest design, you not only will benefit from its wide operating voltage range, high surge current rating, and compliment of options for microswitch, your SPD will also be more robust to meet the protection demands of your customer’s applications.”

The LST Varistor series

  • Facilitate meeting UL1449 listed Type 1 or Type 2 standards by incorporating 200 kA SCCR, 20 kA In, UL1449 Type 4 recognized component assembly.
  • Flexibility of using 50 kA and 75 kA Imax rated devices with the same footprint on PCB.
  • More options for designing remote indication/monitoring of SPD product or system via mechanically triggered AC and DC rated microswitch (Normally Open/Normally Closed, pin length, 2 pin/3 pin/without pin).
  • Clear LST working status indication via a visual tab option that notifies service technicians and maintenance engineers to replace LST at end-of-life (EOL) in order to continue optimal surge protection for the end-product.
  • Wide Operating Voltage Range: Up to 690 Vac for 50 kA version, up to 550 Vac for 75 kA version.

Availability
The LST Varistor series is available in three trays containing 24 pieces each. Sample requests can be placed through authorized Littelfuse distributors worldwide. For a listing of Littelfuse distributors, please visit Littelfuse.com.

For More Information
Additional information is available on the LST Varistor product page. For technical questions, please contact: Johnny Chang, Global Product Manager, at JChang@Littelfuse.com.

About Littelfuse
Littelfuse (NASDAQ: LFUS) is an industrial technology manufacturing company empowering a sustainable, connected, and safer world. Across more than 15 countries, and with 12,000 global associates, we partner with customers to design and deliver innovative, reliable solutions. Serving over 100,000 end customers, our products are found in a variety of industrial, transportation and electronics end markets — everywhere, every day. Learn more at Littelfuse.com.

Media Contact:
Kristina Hodgson
Global Marketing Communications Manager
Electronics Business Unit, Littelfuse, Inc.
KHodgson@littelfuse.com
linkedin.com/in/kristinahodgson/

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