Suntan Varistor from Suntan

February 17, 2012 Views
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Suntan Technology Company Limited
----All Kinds of Capacitors

A varistor is a type of resistor with a significantly non-ohmic current-voltage characteristic. Which have symmetrial voltage-current characteristics and unparalleled large peak current capability are used for absorption of  transient voltage, suppression of pulse noise and circuit voltage stabilization.

The most common type of varistor is the Metal Oxide Varistor (MOV). This contains a ceramic mass of zinc oxide grains, in a matrix of other metal oxides (such as small amounts of bismuth, cobalt, manganese) sandwiched between two metal plates (the electrodes). The boundary between each grain and its neighbour forms a diode junction, which allows current to flow in only one direction. The mass of randomly oriented grains is electrically equivalent to a network of back-to-back diode pairs, each pair in parallel with many other pairs.

Suntan's MOV is exactly TSV series, including different diameters like 05D, 07D, 10D, 14D and 20D. Common packing is Bulk, Ammo and Tape&Reel Packing are also available upon special request.

Features:
1. Low leakage current
2. Excellen voltage ratio
3. Wide voltage
4. Fast response time
5. High stabilization for circuit voltage
6. Unparalleled absorption

Suntan The Working Principle Varistor

August 5, 2011 Views
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Suntan Technology Company Limited
----All Kinds of Capacitors

Varistor is one kinds of transient voltage suppression devices which can be used instead of transient suppression diodes, zener diode and capacitor combination. Varistor IC and other devices can protect the circuit, to prevent electrostatic discharge, surges and other transient current (such as lightning, etc.) the damage caused by them. Simply use varistors and connected to the protected circuit IC or device, when the voltage value above a certain moment, the varistor resistance decreased rapidly, conducting high current, thereby protecting the IC or electrical equipment; when the voltage is lower than the varistor voltage value, the varistor resistance high, almost open, and thus will not affect the device or the normal operation of electrical equipment.

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