MCM Electronics

Piezo Electronic Buzzer - 35mm By Distributed By MCM (28-740) MCM Part #28-740

5 stars 3 reviews

Specifications Top

  • Operating voltage: 3~28VDC
  • Rated maximum current: 20mA
  • Sound output level: Minimum 85dB at 10cm
  • Resonant Frequency: 4.7~0.5 KHz

Part Numbers
MCM Part #:28-740
Distributed By MCM Part #:28-740
Package Specifications & Dimensions
Weight:0.0214 lbs.
RoHS Comp:Yes
Warranty:90 days
Need to Return?
Length:3.75 in.
Width:3 in.
Height:0.75 in.
Shipping Information
Extra Shipping Charge:No
Drop Ship:No

Product Reviews Top

  • by ronbest

    on 5/12/2016

    Great for external chime on alarm system

    Overall: 5 out of 5

    We have used a similar product from Alarm Controls Products that was priced similarly until Assa Abloy bought them & jacked the price up more than double. This is reasonably priced and of good quality. It is a little loud but a 1K or 2K resistor (included with most alarm panels) will bring the volume down to a tolerable level for use as an external chime. We hide them in the bathroom exhaust fan where they are heard but not seen and wiring from the attic is easy.

  • by aberry1144

    on 11/17/2011


    Overall: 5 out of 5

    I have used these buzzers for years in an engineering event with Girl Scouts and they are always dependable and loud! My only issue is occasionally they are on backorder.

  • by kyle.hiner

    on 1/21/2010

    Good product

    Overall: 5 out of 5

    This buzzer creates a very loud high pitched sound that is easy to hear when you are in another room. Constructed out of good quality material.

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