SMTAK3 Series - 3000W, D.C. line protection, Bi-directional

TVS Diode SMTAK3 Hi_Res
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Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

The SMTAK3 series of high current transient suppressors have been specially designed for use in D.C. line protection and any demanding applications. They offer superior clamping characteristics over standard S.A.D. technologies by virtue of the Littelfuse Foldbak technology. Therefore, any voltage rise due to increased current conduction is contained to a minimum, providing the best possible protection level.


  • Very low clamping voltage
  • Sharp breakdown voltage
  • Low slope resistance 
  • Bi-directional
  • Foldback technology for superior clamping factor
  • Symmetric in leads width for easier soldering during assembly
  • Halogen free and RoHS compliant
  • IEC-61000-4-2 ESD 15kV(Air), 8kV (Contact)
  • ESD protection of data lines in accordance with IEC 61000-4-2
  • EFT protection of data lines in accordance with IEC 61000-4-4
  • Designed for use in D.C. line protection and any demanding applications

Access specifications, certifications, check availability and order parts below

Catalog #VR (Vso)MIN VBR@IT
Vc (V)IT
IPP 8x20μs
Operating Temperature Maximum CelsiusPolarityPackagePartner ECAD ModelsStockSamplesCompare
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
SMTAK3-066C TVS SURF MT KA RATED - 3KA 66V BI RoHS No 09/04/2019 PbFree No 09/04/2019 CoC_RoHS9_SMTAK3-066C Yes
SMTAK3-076C TVS SURF MT KA RATED - 3KA 76V BI RoHS No 09/06/2017 PbFree No 09/06/2017 Yes
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