SM20 Series - Surface Mount Varistor for use in applications requiring hi-energy / transient current capability

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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 Littelfuse SM20 Series is a 20mm SMD metal oxide varistor device. The AC rated parts are designed to operate continuously across AC power lines. The DC rated parts are suitable for Automotive applications. The series comprises a Nylon molded package with folded tin plated metal leads for soldering to board.

The SMD Series is based on radial 20mm internal varistor element with similar characteristics to the Littelfuse LA / ZA series of varistors.


  • DC Voltage Rating 26 – 420VDC
  • AC Voltage Rating 175 - 320AC
  • No De-Rating up to 85°C ambient
  • Lead-free, Halogen-free and RoHS compliant
  • Low voltage devices specified for automotive load dump energy
  • Available in "waffle" tray packaging

Access specifications, certifications, check availability and order parts below

Catalog #Polarity(ITM 1xAmps (A)MSLCo Typ
Partner ECAD ModelsStockSamplesCompare
V175SM20Bi-directional6500level 11400455175225303247V175SM20CheckOrder
V230SM20Bi-directional6500level 11100595230300396324V230SM20CheckOrder
V250SM20Bi-directional6500level 11000650250330429354V250SM20CheckOrder
V26SM20Bi-directional2000level 1120006320264032V26SM20CheckOrder
V275SM20Bi-directional6500level 1900710275369473389V275SM20CheckOrder
V300SM20Bi-directional6500level 1800775300405517420V300SM20CheckOrder
V320SM20Bi-directional6500level 1750810320420540462V320SM20CheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
V175SM20 SURFACE MOUNT SM20 VARISTORS RoHS No 04/11/2012 PbFree No 04/11/2012 CoC_RoHS10__V175SM20_10-01-2019 REACH201_Declaration_V175SM20_10-01-2019 Yes
Does not Contain
V26SM20 SM SERIES VARISTOR 26V DC RATING RoHS No 04/11/2012 PbFree No 04/11/2012 CoC_RoHS10_V26SM20_12-06-2018 REACH191_Declaration_V26SM20_12-06-2018 Yes
Does not Contain
V300SM20 SURFACE MOUNT SM20 VARISTORS RoHS No 04/11/2012 PbFree No 04/11/2012 CoC_RoHS10_V300SM20_02-15-2019 REACH197_Declaration_V300SM20_02-15-2019 Yes
Does not Contain
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