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ESD Filter
Electrostatic discharge (ESD) is the sudden flow of electricity between two electrically charged objects caused by contact, an electrical short, or dielectric breakdown. A buildup of static electricity can be caused by tribocharging or by electrostatic induction. The ESD occurs when differently-charged objects are brought close together or when the dielectric between them breaks down, often creating a visible spark.

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AIES12U020R2 [1005 12V 0.2pF]
Chip Varistor
Varistors, variable resistors, are voltage - dependent resistors with bi-directional and symmetrical V/I characteristics. Metal Oxide Varistors, MOV, are primarily made of Zinc Oxide and some suitable additives. When varistors are exposed to over-voltage transient or surge, the varistors switch from stand-by state(nearly open circuits) to clamping state (highly conductive state). The major function is to protect equipments from being damaged by over-voltage transient. At leakage region, the V-I curve shows a linear relationship. The varistor is in high resistance mode and shows as an open circuit. At high current, the varistor is in low resistance mode and shows as a short circuit.

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