Part Number: SMD05T04S121Piezo Electric Ceramic Disc Transducer. Single electrodes on each side (S configuration). Piezo Material: SM121Dimensions: 5mm diameter x 0.4mm thicknessResonant frequency fr: 450 KHz±10 KHz Electromechanical coupling coefficient Kp:≥56%Resonant impedance Zm: ≤5 ΩStatic capacitance Cs: 550pF±15%@1kHzTest Condition: 23±3 °C 40~70% R.H.fr, Zm, Kp => Radial mode vibration applicationCs => LCR meter at 1KHz 1VrmsApplications: Ultrasonic Sensor, Vibration Sensor, Material Stress Sensor, Pressure Sensor and others
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