CG6 Series - Two Terminal Mini Gas Plasma Arresters

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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.

Littelfuse CG6 series GDT is a miniature surface-mount device with a 3kA 8/20 surge rating. This ITU-T K.12 Class 1, Type 1 GDT provides protection against fast rising transients typically caused by nearby lightning events. Its low insertion loss and thus low off-state capacitance makes it compatible with high bandwidth applications up to the GHz RF range. This GDT’s crow barring characteristic protects sensitive ICs from surges as defined in ITU K.20/21/45 Basic and Enhanced Recommendations, GR-1089-CORE first level lightning Port Type 1, 3, and 5, and IEC 61000-4-5 2nd edition Level 5 and below. It is hermetically sealed using non-radioactive materials and is thus environmentally safe. Its 3.5mm diameter size makes it the world’s smallest two-electrode single chamber GDT available.


  • Up to 3kA Surge Capability in Minimal Footprint
  • Ultra-low capacitance (< 0.3 pF)
  • Surface mount form factor with square terminals


  • G.Fast Modems
  • Cable Modems
  • MoCA (Multimedia over Coax Alliance)
  • EMTA (Embedded Multimedia Terminal Adapter)
  • RF Connectors
  • xDSL
  • Set Top Boxes
  • RJ 45 Connectors

Access specifications, certifications, check availability and order parts below

Catalog #VMIN Spark
VNom Spark
VMAX Spark
@ 100V/μs
Capacitance (Co) (pF)Impulse Discharge Current @8/20μs (kA)DC
ElectrodesFailsafePartner ECAD ModelsStockSamplesCompare
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
CG6145SM GP ST&ARD S.A. 145V SMT RoHS No 01/24/2016 PbFree No 01/24/2016 Yes
CG6230SM GP ST&ARD S.A. 230V SMT RoHS No 01/24/2016 PbFree No 01/24/2016 Yes
CG6250SM GP ST&ARD S.A. 250V SMT RoHS No 01/24/2016 PbFree No 01/24/2016 Yes
CG6300SM GP ST&ARD S.A. 300V SMT RoHS No 02/26/2019 PbFree No 02/26/2019 CoC_RoHS10_CG6300SM_02-26-2019 REACH205_Declaration_CG6300SM_05-21-2020 Yes
Does not Contain
CG6350SM GP ST&ARD S.A. 350V SMT RoHS No 01/24/2016 PbFree No 01/24/2016 CoC_RoHS10_CG6350SM_12-11-2019 REACH201_Declaration_CG6350SM_12-11-2019 Yes
Does not Contain
CG6400SM GP ST&ARD S.A. 400V SMT RoHS No 01/04/2017 PbFree No 01/04/2017 CoC_RoHS10_CG6400SM_05-16-2018 Yes
CG6470SM GP ST&ARD S.A. 470V SMT RoHS No 07/27/2017 PbFree No 07/27/2017 CoC_RoHS10_CG6470SM_07-27-2017 Yes
CG675SM GP ST&ARD S.A. 75V SMT RoHS No 07/28/2017 PbFree No 07/28/2017 CoC_RoHS10_CG675SM_10-31-2019 REACH211_Declaration_CG675SM_01-29-2021 Yes
Does not Contain
CG690SM GP ST&ARD S.A. 90V SMT RoHS No 07/21/2016 PbFree No 07/21/2016 CoC_RoHS10_CG690SM_07-17-2019 REACH211_Declaration_CG690SM_02-19-2021 Yes
Does not Contain
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