Part Number: SMC4845T15121
Piezoelectric Ceramic Cylinder. Radial vibration mode.
Piezo Material: SM121
Dimensions: Ext. Diam. 48.1 x Int Diam 45 x Height 15.6mm
Resonant frequency fr: 23 KHz±1.5 KHz
Electromechanical coupling coefficient K31: <29
Dielectric Loss tg δ: <0.50%
Resonant impedance Zr: ≤65.5Ω
Static capacitance Cs: 18400pF±20%@1kHz
Test Condition: 23±3 °C 40~70% R.H.
fr, Zm, Kr => Radial vibration mode
Cs tanδ => LCR meter at 1KHz 1Vrms
Applications, among others, are: Piezo transducer for Underwater communication to send receive data and voice. It is also used for vibration, matter dispersion, biomedical probes, sonar, Hydrophone