Rated Voltage: 3 Vp-p
Operating Voltage: 1～25 Vp-p
Current Consumption: ≤3 mA
Capacitance: 12000±30% PF
Test distance: 10 cm
SPL ≥75 dB @10cm
Resonant Frequency: 3200±500 Hz
Operating Temperature: -20 ～ +70 ℃
Storage Temperature: -30 ～ +80 ℃
Weight: 0.3 g
Carton size: 37.5×23.5×31.5 cm
Quantity: 10000 pcs
Gross Weight: 5 Kg
*Value applying at rated voltage, 3.4KHz, 1/2 duty, square wave Test basic state: Temp(20±2℃), Humidity(40~70%RH), Air pressure(860~1060hPa).
Passive Piezo buzzer features:
Cost lower than another Active piezo buzzer.
Passive internal is not with the source of the shock, so if we directly use the DC signal is no way to make it make a sound, we have to use a 2K-5K square wave to drive it.
Piezo buzzer appearance is usually the circular structure, which is mainly composed of piezoelectric ceramics, leads and resonance chamber.
Piezoceramic buzzer in the middle of the piezoelectric ceramic is mainly composed of metal plating, ceramic, glue and metal sheet.
In fact, if we can from an electrical point of view, the piezoelectric ceramic can be simplified into a voltage source and a series model of the capacitor.