Cart
{{cartCount}}
你当前的浏览器版本过低或不支持。请升级或更换浏览器。推荐浏览器 Chrome Edge。
As a key component for circuit protection, the need for safety certification for varistors (MOVs) depends on the application scenario and the compliance requirements of the terminal product. The following is a clear analysis:
Varistor, especially metal oxide varistor (MOV), is a critical voltage protection component. Its core characteristic is nonlinear resistance: it exhibits high impedance (similar to an insulator) at normal operating voltage, and once the voltage exceeds its specific threshold (varistor voltage), its impedance will sharply decrease (similar to a conductor), thereby releasing excessive current and clamping the voltage at a relatively safe level. This characteristic makes it an expert in absorbing instantaneous overvoltage and surge current.
Varistors, also known as "voltage sensitive resistors," have the core function of providing overvoltage protection for electronic circuits. It is like an intelligent voltage "safety valve", with a unique and critical working principle:
Definition: The voltage value at both ends of a varistor under a specific current (usually 1mA DC) is the threshold voltage that triggers protection.
Varistor, as a common surge suppression component in circuits, its packaging form directly affects power carrying capacity, installation convenience, and environmental adaptability. The following provides packaging selection references from three dimensions: packaging classification, feature comparison, and selection logic, combined with typical application scenarios.
Varistors are a type of voltage limiting protective device, whose core function is to quickly conduct when overvoltage occurs through nonlinear volt ampere characteristics, clamp the voltage within a safe range, and protect the downstream circuit. The following is a detailed classification and technical analysis of varistors:
Varistor (Voltage Dependent Resistors) is a voltage sensitive nonlinear resistor device whose resistance value significantly changes with the applied voltage. It is mainly used for circuit overvoltage protection, surge absorption, and electromagnetic interference suppression. The following is a detailed analysis of its working principle, core characteristics, and applications:
The reasons for generating surges are multifaceted, and surges are a type of spike pulse with high rising speed and short duration. Overvoltage in the power grid, switch ignition, reverse voltage, static electricity, and motor/power supply noise are all factors that cause surges. And surge protectors provide a simple, economical, and reliable protection method for power surge protection of electronic devices.
