Littelfuse LST Series SPD Thermally Protected Varistor

The LST Varistor Series is constructed with Littelfuse’s renowned thermally protected varistor technology (TMOV). The built-in thermal disconnecting function and electric arc shield provides additional protection to prevent catastrophic failure and fire hazard even under the extreme circumstances of varistor end-of-life or abnormal overvoltage conditions. It is specifically designed for Type 1 and Type 2 Surge Protective Devices (SPDs).

FEATURES

• 200kA SCCR, 20kA In, UL1449 Type 4 recognized component assembly.
• Same footprint and PCB layout for Imax 50kA and 75kA options. 
• Mechanically triggered AC and DC rated micro-switch with Normally Open or Normally Closed options for remote indication/monitoring circuit.
• Visual tab option to display LST working status. 
• RoHS compliant, Lead-free, and Halogen-free.

BENEFITS

• Facilitate meeting UL1449 listed Type 1 or Type 2 standards.
• Same PCB layout/design for 50kA and 75kA Imax rated SPDs.
• More flexibilities/options for designing an isolated remote indication/monitoring circuit. 
• Clear indication for technician/engineer to replace EOL product to continue surge protection for the end product. 
• Environment-friendly.

Littelfuse LST Series SPD Thermally Protected Varistor

Littelfuse Technical Datasheets