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Compact Surface Mount Passive Buzzer In Security Systems

  • FBPT3057


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Model No.


Rated Voltage

12Vp-p Square Wave

Max.Allowable Voltage

30Vp-p Square Wave

Max.Rated Current

4mA at 1.3Khz/12Vp-p Square Wave

Min.Sound Pressure Level

88dB at 1.3Khz/12Vp-p Square Wave/30cm

Resonant Frequency


Operating Temperature


Storage Temperature




Compact Surface Mount Passive Buzzer In Security Systems

FBELE is a renowned company specializing in the production and research of passive buzzers. These electronic components are widely used in various applications, including alarms, timers, and electronic devices that require audio output. This article delves into the working principle of a passive buzzer, shedding light on how FBELE's products generate sound through the attachment of a buzzer plate and the application of an external excitation signal.

The Working Principle of piezo transducer:

A passive buzzer consists of a buzzer plate attached internally, which is responsible for generating sound when stimulated by an electric field. Unlike active buzzers, passive buzzers lack an internal vibrating mechanism. Therefore, they rely on an external excitation signal to produce sound. This unique design allows for greater flexibility and control over the sound output.

The Role of the passive buzzer:

The key component within a passive buzzer is the buzzer plate. This plate is typically made of piezoelectric material, which has the ability to convert electrical energy into mechanical vibrations. When an electric field is applied to the buzzer plate, it undergoes rapid oscillations, resulting in the production of sound waves. The frequency and intensity of these vibrations determine the pitch and volume of the sound produced by the passive buzzer.

External Excitation Signal:

To activate the passive buzzer and generate sound, an external excitation signal is required. This signal is typically provided by an electronic circuit or microcontroller, which sends a specific electrical waveform to the buzzer. The waveform can be in the form of a square wave, sine wave, or any other desired shape, depending on the application requirements. By varying the frequency and duration of the excitation signal, the sound output of the passive buzzer can be controlled and modulated.

Advantages of Passive Buzzers:

Passive buzzers offer several advantages over their active counterparts. Firstly, they are simpler in design and do not require an internal vibrating mechanism, making them more cost-effective and reliable. Additionally, passive buzzers allow for greater control over the generated sound, as the external excitation signal can be easily adjusted to achieve the desired pitch, volume, and duration. This flexibility makes passive buzzers suitable for a wide range of applications, from simple audio alerts to more complex musical compositions.

FBELE's Expertise in Passive Buzzer Production:

With years of experience in the field, FBELE has established itself as a leading manufacturer and developer of passive buzzers. The company's commitment to quality and innovation ensures that their products meet the highest standards and cater to the diverse needs of customers. FBELE's passive buzzers are known for their exceptional performance, durability, and versatility, making them a preferred choice for various industries worldwide.

Passive buzzers play a significant role in the field of electronics, providing audio output in a wide range of applications. FBELE's expertise in passive buzzer production and research enables them to deliver high-quality products that meet the demands of modern technology. By understanding the working principle of passive buzzers and the importance of external excitation signals, engineers and designers can effectively utilize these components to enhance the auditory experience in their electronic devices.


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Established in 1997, FBELE has been one of the best electronic components manufacturer and distributor in China, Our electronic components have been applied to various fields.

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