Zener diode
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Zener diode is like a normal diode, but instead of being destroyed by a big reverse voltage, it lets electricity through. The voltage needed for this is called the breakdown voltage or Zener voltage.[1] Because it can be built with a known breakdown voltage, it can be used to accurately measure voltage.
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Wikimedia Commons has media related to Zener diodes.
- ↑ "Zener Diode". Archived from the original on 3 January 2013. Retrieved 31 May 2012.