What is a Varistor?
Varistor or Voltage Dependent Resistor is a non linear electronic component that changes its resistance when a voltage is applied across it. It is always placed in shunt position with the device being protected. This nonlinear characteristic of the varistor makes it ideal for use as surge protector device. When a high voltage transient occurs in the circuit, the varistor begins to conduct and clamps the transient voltage to a safe level. The incoming surge's energy will be partially conducted and absorbed, thus protecting the circuit from getting damaged.
Varistors are commonly used for short-duration protection in case of high transient voltage surges that are of 1-1000 microseconds. They are not suitable for handling sustained surges.
Key applications of Varistor:
- Radio communication equipment transient suppression
- Surge protector power strips
- Cable TV system surge protectors
- Power supply protection
- Microprocessor
- Electronics equipment protection
- Low voltage board level protection
- Transient voltage surge suppressor (TVSS)
- Automotive systems
- Industrial
Varistors from the leading manufacturers are listed on everything PE. You can use the filters on the left side to narrow down the list of products based on your requirements - Type, AC Voltage Rating, DC Voltage Rating, and other parameters. Our parametric search tool will scan multiple manufacturer websites to identify Varistors that meet your requirement. You can then download datasheets, request quotations via everything PE. Your inquiry will be routed to the manufacturer or their representative who will give you more information on the product.
