V385SM7 Circuit Protection

Varistors, also known as voltage dependent resistors (VDRs), are a type of surge protection device enabled by nonlinear voltage restrictions, which modify the relations between voltage and current.   This technology has been widely utilized in various electrical and electronic applications, ranging from consumer electronics to industrial automation. In this article, the application field and working principle of V385SM7 will be discussed.

The V385SM7 is a Varistor with high rate current breakdown. It is designed to suppress large transients, and is particularly suitable for use in lightning protection circuits to guard against lightning surge events. It is composed of a rectifier and capacitor, both of which are usually connected in series to form a varistor.

In terms of its physical application, the V385SM7 is typically used in areas such as lightning protection, DC power distributions, and even consumer electronics, where voltage surges are common. Its slim profile and low profile capacitance makes it a prime choice for limited space applications.

The working principle of the V385SM7 is based on the effect of nonlinear voltage restrictions, which modifies the relations between voltage and current. When a small voltage is applied, the V385SM7 acts as an unconductive resistor, meaning that most of the voltage is blocked or restricted from flowing. When a large voltage is applied, the V385SM7 acts as a conductive resistor, allowing more of the voltage to pass through. This means that when a surge is detected, the voltage clamping effect of the V385SM7 has an impact on the voltage, and thus serves to protect the electronic device from damage.

The V385SM7 also features very fast response time, allowing it to react to surges in mere microseconds. Additionally, the device has high electrical holding capacity, meaning it can withstand and dissipate higher amounts of energy, resulting in improved over-voltage protection.

Overall, the V385SM7 is an invaluable surge protection device for a variety of applications, ranging from lightning protection for outdoor installations to DC power distributions. Its wide range of features, such as its nonlinear voltage regulations, fast response time and high electrical holding capacity make it the ideal choice for many applications.