Single-phase surge protective devices (SPDs) provide NEC-required protection against transient voltage surges from lightning strikes, current
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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).
- 200 kA SCCR, 20 kA In, UL1449 Type 4 recognized component assembly
- Same footprint and PCB layout for Imax 50 kA and 75 kA 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
- Facilitate meeting UL1449 listed Type 1 or Type 2 standards
- Same PCB layout/design for 50 kA and 75 kA 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
LST Parts
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LST Applications
Single-Phase SPDs
Three-Phase SPDs
Three-phase surge protective devices (SPDs) provide NEC-required protection against transient voltage surges from lightning strikes, current
