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20mm Uncased Piezo

A 20mm Uncased Piezo element with 90mm leads. Resonant frequency 6KHz. These elements require an external drive circuit to produce sound.

Availability: In Stock.

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This product is also available in the following versions:

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20mm Uncased Piezo, single
20mm Uncased Piezo, pack of 25

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Product description:

These 20mm Uncased Piezo elements have 90mm fly leads. They require an external drive circuit to produce sound.


  • Simple, inexpensive uncased piezo.


  • 1 x 20mm Uncased Piezo.


  • Diameter: 20mm.
  • Lead Length: 90mm.


  • External drive circuit.


Physical characteristics:

  • Diameter: 20mm.
  • Lead Length: 90mm.

Electrical characteristics:

  • Resonant Frequency : 6.0KHz.
  • Maximum Resonant Resistance: 500 Ohms.
  • Maximum Input Voltage: 30V (Peak to Peak).


Posted by Sarah Evans, Thursday, 21 April 2016 on product 20mm Uncased Piezo


Would these work with the BBC Microbit? After some cheap kit so that we can do more interesting stuff!!


  • Posted by Michael Lockhart on Thursday, 21 April 2016

    Yes you would be able to to use this, the code for using this buzzer would be slightly different to using a buzzer with built in drive.

Posted by Gina Longman, Wednesday, 15 October 2014 on product 20mm Uncased Piezo


Is the Piezo 3309-01 a 3 volt piezo? please let me know asap.


  • Posted by Aaron Sturman on Wednesday, 15 October 2014
    Hi, it would be very quiet with 3V. This piezo also has no drive. Are you planning on providing a frequency signal to it or just using it as an on-off type buzzer?

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