07D330K is a common varistor, which belongs to voltage-sensitive electronic components. The code in its name has a specific meaning:

  • "07" indicates that the diameter of the component is 7mm
  • "D" represents the disc shape
  • "330" indicates that the nominal voltage is 33V
  • "K" indicates that the voltage tolerance is ±10%

Main Techanical Parameters

  • Varistor voltage (V1mA): 33V±10% (@1mA)
  • Maximum continuous operating voltage: 20V AC/26V DC
  • Maximum clamping voltage: 65V (at 2.5A)
  • Energy absorption capacity: 3.5J
  • Response time: <25ns
  • Operating temperature range: -40℃～+85℃
  • Capacitance value: about 760pF (at 1kHz)

Working Principle

The core material of the varistor is a sintered body of zinc oxide (ZnO) and other metal oxides. Under normal voltage, the potential barriers between ZnO grains prevent the current from passing; when the voltage exceeds the threshold, these barriers are broken down, forming a conductive channel, and the current increases rapidly. This characteristic makes it an ideal transient voltage suppression device.

Applications

  • Consumer electronics: mobile phone chargers, USB interface protection
  • Industrial control: PLC input/output protection
  • Communication equipment: Modem, router surge protection
  • Automotive electronics: 12V automotive system overvoltage protection
  • Household appliances: low-power power adapter

Summary

As a basic circuit protection component, varistors play an important role in various electronic devices. Correct selection and use of varistors can significantly improve the reliability and anti-interference ability of electronic products and reduce the failure rate caused by voltage transients.

Product Line

For datasheet and more details of 07D330K, please visit the website:

https://semiware.com/en/product-general-mov/07d330k

About Semiware
Semiware has a comprehensive product lineup of circuit protection device products. The company leverages its technology in the semiconductor field and application background in end products to serve customers in the electronics, automotive and industrial markets. For more information, please visit semiware official website: https://semiware.com/en/

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