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Specifications:
Rated Voltage: A magnetic buzzer is driven by 1/2 square waves (V o-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.
Direct Current Resistance: The direct current resistance is measured by ammeter directly.
Sound Output: The sound output is measured by decibel meter. Applying rated voltage and 1/2 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 電磁式蜂鳴器以1/2方波(V o-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
Direct Current Resistance 以電表直接量測的直流阻抗
Sound Output 加以額定的電壓,1/2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: AX series with built drive circuit will be the best choice when we cannot provide frequency signal to a buzzer, it only needs direct current.
Dimension: Dimension affects frequency, small size result in high frequency.
Voltage: Depend on V o-p (1/2 square waves)
Fixed methods: From the highest cost to the lowest- DIP, wires/ connector, SMD.
Soldering methods: AS series is soldered by hand, the frequency is lower because of the holes on the bottom.On the other hand, we suggest AC series for the reflow soldering, the reliability is better.

驅動方式 若無法提供頻率信號給蜂鳴器工作,可考慮用AX系列(內含驅動線路),給予直流電壓即可.
尺寸大小 尺寸會影響頻率,小尺寸頻率會較高.
電壓大小 以V 0-P計算 (1/2方波).
固定方式 DIP最便宜,焊線次之,SMD成本最高.
焊接方式 手焊可用AS系列,底部有氣孔頻率可較低,過鍚爐建議使用AC系列,信賴度較好.