VG181245U900DP Circuit Protection

A varistor or voltage-dependent resistor (VDR) also known as varicap, is a component which exhibits nonlinear current–voltage behaviour. These devices are mainly used to protect circuits from voltage transients (e.g., lightning-induced spikes) by limiting the rise of voltage. Varistors are typically made from sintered forms of metal oxide, such as manganese oxide, zinc oxide, or a combination of both.

The VG181245U900DP is a varistor specifically designed for protection of electronic equipment. This varistor is Wi-Fi and IEEE 802.11 certified for use in Wi-Fi applications. It offers a wide operating temperature range and is RoHS compliant. The device has an operating voltage of 18V and a capacitance rating of 900pF.

The VG181245U900DP is a surface-mounted type varistor that offers protection from overvoltages up to 18V. It is capable of absorbing extreme levels of energy, providing reliable and effective circuit protection. Moreover, the device can provide protection from both transient and long duration overvoltage events.

The VG181245U900DP is a device with an optimal voltage and current capability so it can be used in a variety of applications where a high level of circuit protection is needed. These applications include telecom, consumer electronics, power supplies, and automation systems. The device is also suitable for AC/DC motor drives with higher transients.

For these applications, the VG181245U900DP device offers protection from electrostatic discharge (ESD), radio frequency interference (RFI), and other high voltage transients. It is designed for absorption and clamping of both positive and negative transients. The device clamps fast transients to safe levels and slows down slower transients with its low let-through rate.

The VG181245U900DP operates according to the “metal-oxide variable resistor” (MOV) principle. This is a dynamic mechanism involving the movement of electrons. The device is composed of two layers of electrodes, separated by an insulator, and a semiconducting material, the metal oxide.

When a voltage spike exceeds the normal operating voltage range, current passes through the device and causes the electrons to flow from the metal oxide. This charge imbalance produces a change in resistance, causing the voltage to drop and clamp the transient. The charge then dissolves and resumes the device’s normal condition.

The VG181245U900DP is a surface-mounted type varistor with a wide voltage and energy rating. It is suitable for a variety of applications where circuit protection from overvoltages is needed. The device is designed to absorb and clamp transient events, and provides reliable and effective protection. It operates on the “metal-oxide variable resistor” (MOV) principle and can protect against ESD, RFI, and other high voltage transients.