Specialist in Acoustic Components  




Introduction of Magnetic Buzzer


buzzer structure

working Theory

Testing Method

Testing Circuit



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℃.

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.

How to choose a buzzer