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Semtech TClamp1272S

Semtech TClamp1272S

Low Capacitance TClamp® Surge Protection for xDSL Interfaces

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The TClamp®1272S provides dedicated line driver side surge and ESD protection for ADSL and VDSL applications.
It is designed to replace multiple discrete components in portable applications.


  • Transient protection for high-speed data lines to
    • IEC 61000-4-2 (ESD) 30kV (air), 30kV (contact)
    • IEC 61000-4-4 (EFT) 40A (5/50ns)
    • IEC 61000-4-5 (Lightning) 25A (8/20μs)
  • Array of surge rated diodes with internal TVS Diode
  • Bias diodes prevent charging and discharging of TVS capacitance
  • Low capacitance: (<5pF)
  • Operating voltage: 12V
  • Low leakage current
  • Solid-state silicon-avalanche technology


  • Line Driver Side protection of ADSL and VDSL interfaces
  • Modems and Gateways
  • Access Equipment
  • Central Offi ce Equipment
  • Customer Premise Equipment


  • JEDEC SOT-23 6L

Order Codes

  • TClamp1272S.TCT - Pb-Free, Halogen Free, RoHS/WEEE Compliant
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