ZOV 07D511K Metal Oxide Varistor

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The Metal Oxide Varistor (MOV)  is a component that is used in electrical circuits to limit the voltage. They're mostly found in voltage-sensitive electrical gadgets' protection circuits. A varistor effectively bypasses all transient surge voltages.

A varistor is a voltage-dependent, nonlinear device that behaves similarly to back-to-back Zener diodes in terms of electrical behaviour.
Zinc oxide varistors are nonlinear resistors made up mostly of zinc oxide and a variety of metal oxide additives. They are utilised for transient voltage absorption, pulse noise suppression, and circuit voltage stability and have bilateral and symmetrical V-I characteristics curves with exceptional huge peak current capabilities.

The MOV's resistance varies in response to the voltage across it. The resistance lowers as the voltage across it rises, and vice versa. This characteristic is useful for preventing high voltage spikes in circuits. When the voltage is within the rated limits, the MOV's resistance is extremely high, allowing all current to flow through the circuit but not through the MOV.
However, as the MOV is connected in parallel to the AC mains, a voltage spike in the main voltage appears directly across it. This high voltage reduces the MOV's resistance to a very low value, which makes it act as a short.

  • Fast Response
  • Excellent Voltage Ratio
  • High Stabilization of Circuit Voltage
  • Unparalleled absorption for transient voltage characteristics
  • Bilateral and Symmetrical V-I characteristics curve


  • Surge protection in consumer electronics
  • Absorption of switching surge from various kinds of relays and electromagnetic valves.
  • Electrostatic discharge and spike noise suppression
  • Protection of various kinds of transistors, diodes, triacs, thyristors, ICs.
Varistor Voltage 510V
Tolerance ±10%
Element Diameter 7mm
Capacitance Value 100pF
Model ZOV-07D511K
Operating Temperature -40°C to 105°C
Mounting Type Through Hole
Country of Origin China

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