SP4031 Series - Hybrid Protection Module for 10/100/1000 BaseT Ethernet

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The SP4031 hybrid protector offers both overcurrent and differential only overvoltage protection for applications such as 10/100/1000BaseT ports. Compliant with the newest standards of overvoltage per industry standard ITU-T K.21. Tested to basic tests levels 2.5kV overvoltage. Flow-through package layout allows PCB trace routing directly through the SP4031 without changing pitch dimensions, thus having less impact on normal signal high frequency components.


During a prolonged overvoltage event such as a power fault, this component will present a high impedance. The high impedance state will reset once the power fault event has ended. During a fast transient event, the component will clamp, thus protecting any downstream chipsets.



  • This SP4031 hybrid component provides a tested and proved protection solution for high-speed interfaces, such as10/100/1000 BaseT applications
  • Low parasitic capacitance
  • Low breakdown voltage(>3.5V)
  • Low capacitance of 2.5pF(@VR=0V)
  • Lightning, 35A (8/20 asdefined in IEC 61000-4-52nd edition)
  • EFT, IEC 61000-4-4, 40A(5/50ns)
  • ESD, IEC 61000-4-2,±30kV contact, ±30kV air
  • Moisture Sensitivity Level(MSL -1)
  • Lead free and RoHS compliant


  • 10/100/1000BaseT Ethernet
  • ITU K.21 Basic level compliance
  • ADSL/VDSL/G.fast modem
  • Industrial Ethernet

Access specifications, certifications, check availability and order parts below

Catalog #AEC-Q101 QualifiedStandoff
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Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
SP4031-02BTG 2CH 80A 3.3V TVS Diode SOIC8 RoHS No 10/12/2018 PbFree No 10/12/2018 Yes
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