Littlefuse Introduces New LST Varistor Series
March 09, 2021
News
Littelfuse introduced the 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 provides additional robust protection to prevent catastrophic failure and fire hazard 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:
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Residential, Commercial, and Industrial buildings
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Uninterruptable Power Supply (UPS)
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Industrial motor control
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Renewable energy
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HVAC system
Benefits per a company press release include:
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Facilitate meeting UL1449 listed Type 1 or Type 2 standards by incorporating 200 kA SCCR, 20 kA In, UL1449 Type 4 recognized component assembly.
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Flexibility of using 50 kA and 75 kA Imax rated devices with the same footprint on PCB.
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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).
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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.
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Wide Operating Voltage Range: Up to 690 Vac for 50 kA version, up to 550 Vac for 75 kA version.
For more information, visit littelfuse.com