SM20 Series 20 mm SMD Varistors

Littelfuse latest development in overvoltage circuit protection and transient suppression

Image of Littelfuse's SM20 Series 20mm SMD VaristorsThe Littelfuse SM20 series devices are surface-mount metal oxide varistors that are used in applications requiring hi-energy and transient current capability. The AC rated parts are designed to operate continuously across AC power lines. The DC rated parts are suitable for automotive applications, and the series comprises a Nylon molded package with folded tin plated metal leads for soldering to a PCB. The SM20 series is based on a radial 20 mm internal varistor element with similar characteristics to the Littelfuse LA/ZA series of varistors.

Features Applications
  • DC voltage rating: 26 VDC
  • AC voltage rating: 175 - 320 VAC
  • No de-rating up to 85°C ambient
  • Lead- and halogen-free, RoHS compliant
  • Low voltage devices specified for automotive load dump energy
  • Available in "waffle" tray packaging
  • Load management equipment
  • Automotive load dump devices
  • Electronic/AC power meter
  • Valves used in automatic car wash systems
  • Plug-in cards
  • Remote controls
  • GFCIs (ground fault circuit interrupters)
  • Motor compressors
  • Drive and control electronics
  • Switch mode power supplies and UPS

SM20 Series 20 mm SMD Varistors

ImageManufacturer Part NumberDescriptionPackagingVaristor Voltage (Min)Varistor Voltage (Typ)Available Quantity
V175SM20 datasheet linkVARISTOR 247V 6.5KA DISC 20MMV175SM20VARISTOR 247V 6.5KA DISC 20MMTray - Waffle247V275V194 - Immediate
V175SM20 product page link
V230SM20 datasheet linkVARISTOR 324V 6.5KA DISC 20MMV230SM20VARISTOR 324V 6.5KA DISC 20MMTray - Waffle324V360V381 - Immediate
V230SM20 product page link
V250SM20 datasheet linkVARISTOR 354V 6.5KA DISC 20MMV250SM20VARISTOR 354V 6.5KA DISC 20MMTray - Waffle354V391.5V177 - Immediate
V250SM20 product page link
V320SM20 datasheet linkVARISTOR 462V 6.5KA DISC 20MMV320SM20VARISTOR 462V 6.5KA DISC 20MMTray - Waffle462V501V316 - Immediate
V320SM20 product page link
V300SM20 datasheet linkVARISTOR 420V 6.5KA DISC 20MMV300SM20VARISTOR 420V 6.5KA DISC 20MMTray - Waffle420V468.5V206 - Immediate
V300SM20 product page link
V26SM20 datasheet linkVARISTOR 32V 2KA DISC 20MMV26SM20VARISTOR 32V 2KA DISC 20MMTray - Waffle32V36V204 - Immediate
V26SM20 product page link
V275SM20 datasheet linkVARISTOR 389V 6.5KA DISC 20MMV275SM20VARISTOR 389V 6.5KA DISC 20MMTray - Waffle389V431V44 - Immediate
V275SM20 product page link
Published: 2011-03-18