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Specifications:

Rated Voltage: A piezo buzzer is driven by square waves (V p-p).
Operating Voltage: For normal operating. But it is not guaranteed to make the minimum SPL under the rated voltage.
Consumption Current: The current is stably consumed under the regular operation. However, it normally takes three times of current at the moment of starting to work.
Capacitance: A piezo buzzer can make higher SPL with higher capacitance, but it consumes more electricity.
Sound Output: The sound output is measured by decibel meter. Applying rated voltage and square waves, and the distance of 10 cm.
Rated Frequency: A buzzer can make sound on any frequencies, but we suggest that the highest and the most stable SPL comes from the rated frequency.
Operating Temp.: Keep working well between -30℃ and +70℃.

Rated Voltage 壓電式蜂鳴器以方波(V p-p)驅動
Operating Voltage 可正常工作的適用電壓範圍,但不保證低於額定電壓時仍能達到最低音壓
Consumption Current 正常發聲後,持續的消耗電流量.而啟動瞬間需要的電流,一般至少需要持續耗電流的三倍
Capacitance 陶瓷片的電容量,電容量愈大音壓易做大,但較耗電.
Sound Output 加以額定的電壓,方波,以Db表在距離10cm測得
Rated Frequency 蜂鳴器每一個頻率都仍有聲音,額定的頻率指建議使用的最大,且音壓一致性較好的頻點
Operating Temp. 能維持正常動作的溫度 –30--+70度

How to choose:

Driving methods: AZ-xxxxS-x series with built drive circuit will be the best choice when we cannot provide frequency signal to a buzzer, it only needs direct current. Besides, there are different tone nature for you to choose, such as continuous, fast pulse, and slow pulse.
Dimension: Dimension affects frequency, small size result in high frequency.
Voltage: Driven by square waves (V p-p), the higher voltage results in the higher SPL.
Pin Pitch: The numerous spec. for the piezo buzzers lead to the difficulty in finding a spec. in facsimile, therefore we suggest that you can firstly choose a spec. with the same pitch and similar frequency.

驅動方式 若無法提供頻率信號給蜂鳴器工作,可考慮用型號為AZ-xxxxS-x系列(內含驅動線路),給予直流電壓即可. 另有直音,快斷音,慢斷音不同的聲響信號,
尺寸大小 尺寸會影響頻率,小尺寸頻率會較高.
電壓大小 以方波驅動(V P-P),電壓愈高,音量愈高.
Pin pitch 壓電式蜂鳴器規格眾多,往往不易找到一模一樣的規格,可先挑pitch一樣,頻率接近的試用.