V18MLE1206NH Circuit Protection

Varistors, known as Voltage Dependent Resistors (VDRs) or Variable Nonlinear Resistors (VNRs), are electronic components that have a non-linear voltage-current characteristic. Varistors are typically made from sintered mixtures of metal oxide particles, such as zinc oxide or tin oxide. Varistors, or metal oxide varistors (MOVs), are designed to provide protection against voltage transients on circuits. The V18MLE1206NH is an MOV manufactured by Vishay Intertechnology designed for TVS applications.

The V18MLE1206NH is a radial leaded varistor that is designed specifically for surface mount applications. It has a rated breakdown voltage of 18 volts and a rated current of 1.2 amperes (A). The varistor is constructed from a sintered mixture of zinc oxide and manganese dioxide. It has a small size, measuring just 12mm long and 6mm wide, making it suitable for use in a variety of applications.

MOVs are used in a wide range of applications, including power line surges, lightning protection, high speed switching, and other power applications. The V18MLE1206NH is well-suited for use in high-reliability systems, as it is designed to withstand up to 30 volts of peak–to–peak voltage. Additionally, it is designed to withstand up to 20 amps of surge current for 10 seconds or less, offering protection against short-duration power surges. As a result, the V18MLE1206NH is ideally suited for use in a variety of power applications, such as power supplies, transformers, inverters, and motor drives.

The working principle of the V18MLE1206NH is based on the fact that when a voltage is applied across the terminals of the varistor, the current will not depend linearly on the applied voltage. Instead, the current will increase exponentially with the applied voltage until it reaches a peak level. The maximum current (or holding current) is typically selected to be below the maximum rating of the varistor. Once the peak voltage is reached, the current starts to decrease exponentially until it reaches a low level. This phenomenon is known as current clamping.

The V18MLE1206NH is designed to limit the peak voltage and current that is seen on a circuit and protect against voltage transients. It is a cost-effective solution for applications that require transient voltage protection, and its small size makes it easy to design into a variety of circuit boards. Additionally, the MOV has a wide operating temperature range and low capacitance, making it suitable for use in a variety of applications.

In conclusion, the V18MLE1206NH is an MOV manufactured by Vishay Intertechnology designed for transient voltage protection. The varistor is constructed from a sintered mixture of zinc oxide and manganese dioxide, and it has a rated breakdown voltage of 18V and a rated current of 1.2A. It has a small size, measuring just 12mm long and 6mm wide, and the maximum peak voltage and current it can withstand is 20A for 10 seconds or less at 30V. The varistor is designed to limit the peak voltage and current that is seen on a circuit and protect against voltage transients, making it suitable for use in power supplies, transformers, inverters, and motor drives.