PKB Piezoelectric Audio Alarm

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Murata's PKB series of piezoelectric audio alarms is a unified piezoelectric sounder which has a piezoelectric diaphragm of 3 terminals connected to a self drive circuit, and it easily generates sound with only a DC power supply (DC3.0-20V). Using suitably designed resonant system, this type can be used where large sound volumes are needed.


  • No EMI generated
  • RoHS Compliant


  • Gas alarms, burglar alarms
  • Air conditioners, microwave ovens and various types of microcomputer controlled home-electronic appliances
  • Toys, games, and other simple electronic devices such as teaching aids