V480LT40APX2855

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The V480LT40APX2855 is a varistor (Voltage Dependent Resistor, or VDR). It is a three-terminal device designed to provide transient overvoltage protection to a variety of electrical components and circuits. It is most frequently used in transient overvoltage applications that require low leakage current and fast response time.

A V480LT40APX2855 is composed of a metal oxide ceramic (MOC) disk surrounded by metal electrodes (usually a tin-lead alloy). The MOC disk is designed to have a significantly higher resistivity than the surrounding metal electrodes, thus creating a voltage-dependent series resistance.

The typical working voltage of the V480LT40APX2855 is 480 volts, and the operating current is 40 milliamps. The nominal capacitance value is 2855 picofarads, and the response time is <40 nano seconds.

Varistors are primarily used in electrical applications to protect circuits from overvoltages and overcurrents. In the event of a transiendent overvoltage or overcurrent, the V480LT40APX2855 varistor quickly transitions from a very high resistance (low current) state to a very low resistance (high current) state in order to provide low-impedance bypass for the high current, thus preventing damage to the protected circuit.

Since the V480LT40APX2855 varistor has low leakage current and fast response time, it is particularly well-suited for sensitive applications, such as protecting cable modems, DSL modems, and other cable/DSL splitters from voltage surges. It is also used for protecting Ethernet connectors, network adapters, and other telecommunications equipment.

In addition, V480LT40APX2855 varistors are used in a variety of other applications, such as protecting computer motherboards, power supplies, laser printer controllers, floppy disk and hard drives, base transceiver stations, and other sensitive electronic circuits from overvoltage and overcurrent.

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