AQ4021 Series - 2.5pF, 25A Discrete TVS Diode

TVS Diode Array AQ4021 Image
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Disclaimer Notice

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 AQ4021 components integrate low capacitance steering diodes with one or two avalanche breakdown diodes for unidirectional or bidirectional protection, respectively, to protect against ESD and lightning induced surge events. These components can safely absorb up to 25A per IEC 61000-4-5 2nd edition (tp=8/20μs) without performance degradation and a minimum ±30kV ESD per IEC 61000-4-2 International Standard. The low loading capacitance and high surge capability make it ideal for protecting telecommunication ports such as Ethernet and other high speed data interfaces.

Features & Benefits:

  • ESD, IEC 61000-4-2, ±30kV contact, ±30kV air
  • EFT, IEC 61000-4-4, 40A (5/50ns)
  • Lightning, IEC 61000-4-5 2nd edition, 25A (tP=8/20μs)
  • Low capacitance of 2.5pF(@ VR=0V)
  • Low leakage current
  • Unidirectional and Bidirectional configuration
  • Small SOD323 package fits 0805 footprints
  • AEC-Q101 qualified
  • Halogen free, Lead free and RoHS compliant
  • Moisture Sensitivity Level (MSL -1)


  • 10/100/1000 Ethernet
  • T1/E1/T3/E3
  • USB 1.1/2.0
  • Power Ports
  • Computers and Peripherals
  • Instrumentation
  • Medical Equipment
  • CAN Bus protection
  • Automotive applications

Access specifications, certifications, check availability and order parts below

Catalog #AEC-Q101 QualifiedStandoff
ESD Contact
PolarityChannelsMIN VBR@IT
PackagePartner 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
AQ4021-01FTG 1Ch 30KV 12V Uni TVS Diode Array RoHS No 01/21/2019 PbFree No 01/21/2019 CoC_RoHS10_AQ4021-01FTG REACH_SVHC Declaration_AQ4021-01FTG.pdf Yes
Does not Contain IPC_AQ4021-01FTG, AQ4021-01FTG-C_EASF
AQ4021-01FTG-C 1Ch 30KV 12V Bi TVS Diode Array RoHS No 09/20/2017 PbFree No 09/20/2017 CoC_RoHS10_AQ4021-01FTG-C REACH_SVHC Declaration_AQ4021-01FTG-C.pdf Yes
Does not Contain IPC_AQ4021-01FTG, AQ4021-01FTG-C_EASF
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