UltraMOV25S Series - High Peak Surge Current Radial Lead Varistor

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UltraMOVTM 25S Varistor Series - High Peak Surge Current Radial Lead Varistor
The UltraMOVTM 25S Varistor Series is designed for applications requiring high peak surge current ratings and high energy absorption capability. UltraMOVTM varistors are primarily intended for use in AC Line Voltage applications or other products that require voltage clamping of high transient surge currents from sources.

These devices have 25mm square forms are produced in a radial lead package and offered with straight leads. UltraMOVs are manufactured with recognized epoxy encapsulation and are rated for ambient temperatures up to 85℃ with no derating. This 25S Series is LASER-branded and is supplied in bulk packaging.


  • Lead-free and RoHS compliant
  • High peak surge current rating (ITM) 22kA, single 8/20μs pulse, (25mm)
  • 40kA rating when 2 devices paralleled (VN(DC) matched within +/- 5%
  • Standard operating voltage range compatible with common AC line voltages (115 to 750 VAC)
  • Characterized for maximum standby current (Leakage)
  • Custom voltage types available
  • Standard lead form and lead space options


  • Surge Protective Devices (SPD)
  • Uninterruptable Power Supplies (UPS)
  • AC Power Taps and Meters
  • Lightning
  • Inductive Load and Capacitor Bank Switching

Access specifications, certifications, check availability and order parts below

Catalog #SizeVMAX AC (V)VMAX DC (V)WTM (J)(ITM 1xAmps (A)VNDC MIN
VNDC MAX (V)Vc (V)PolarityCo Typ

Littelfuse_Dongguan BeiCe MOV_ISO TS16949icon Littelfuse_Dongguan_IATF16949_October-2020

Littelfuse_Dongguan BeiCe MOV_ISO14001 2004icon Dongguan ISO14001 2015_June 29 2020

MOV Factory

Littelfuse_Dongguan BeiCe MOV_ISO9001 2000icon Littelfuse Dongguan_ISO9001 2015_October-2020

MOV/MLV Factory

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