Editorial Technical Reference

Piezoelectric Sounder

This page explains how Piezoelectric Sounder is classified within Computer, Electronic and Optical Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

An electronic audio signaling device that generates sound using piezoelectric effect

Product Specifications

Technical details and manufacturing context for Piezoelectric Sounder

Definition
A piezoelectric sounder is a compact electronic audio signaling component used in audible and visual alarm systems. It converts electrical signals into audible tones through the piezoelectric effect, where a piezoelectric ceramic element deforms mechanically when an alternating voltage is applied. This deformation vibrates a metal diaphragm attached to the ceramic, producing sound waves at specific frequencies. Typically employed for alerts, warnings, and notifications in electronic devices, this component is characterized by its small size, low power consumption, and reliable operation. The sounder operates within a rated voltage range of 3–24 V DC, with a sound pressure level (SPL) of 85–95 dB measured at 10 cm under rated voltage. Its resonant frequency typically falls between 2300 and 4200 Hz, suitable for alarm tones. The operating temperature range is -40 to 85 °C, and current consumption at rated voltage with no load is ≤30 mA. Capacitance at 1 kHz and 1 Vrms ranges from 10000 to 30000 pF. The housing material is liquid crystal polymer (LCP) with a UL 94 V-0 flame retardant grade. Weight varies from 1.5 to 3.0 g depending on size and housing. The component offers dust and water resistance per IEC 60529 with IP ratings from IP54 to IP65. Unit-to-unit variation in SPL is ±3 dB. Materials include piezoelectric ceramic, metal diaphragm, plastic housing, and electrical contacts. This directory entry provides reference ranges; actual model-specific values and standards must be verified with the legal manufacturer or supplier.
Working Principle
When an alternating voltage is applied to the piezoelectric ceramic element, it causes mechanical deformation due to the piezoelectric effect. This deformation creates vibrations in a metal diaphragm attached to the ceramic, producing sound waves at specific frequencies. The frequency of the sound is determined by the resonant frequency of the ceramic-diaphragm assembly, typically in the range of 2300–4200 Hz. The amplitude of the sound, measured as sound pressure level, depends on the applied voltage and the construction of the sounder. The component is designed to operate within a specified voltage range (3–24 V DC) and temperature range (-40 to 85 °C). The piezoelectric effect is reversible, but in this application, it is used to generate sound from electrical signals. The metal diaphragm amplifies the vibrations and couples them to the air, producing audible tones. The sounder's performance is characterized by parameters such as SPL, resonant frequency, and current consumption, which are influenced by the materials and design.
Common Materials
Piezoelectric ceramic, Metal diaphragm, Plastic housing, Electrical contacts
Technical Parameters
ParameterTypical rangeNotes & selection driver
Rated Voltage3–24 V DCOperating voltage range for continuous operation
Sound Pressure Level85–95 dBMeasured at 10 cm, rated voltage
Resonant Frequency2300–4200 HzTypical frequency range for alarm tones
Operating Temperature-40–85 °CStorage and operation limits
Current Consumption≤30 mAAt rated voltage, no load
Capacitance10000–30000 pFAt 1 kHz, 1 Vrms
Housing MaterialLCPFlame retardant gradeUL 94 V-0
Weight1.5–3.0 gDepends on size and housing
IP RatingIP54–IP65Dust and water resistanceIEC 60529
Tolerance on SPL±3 dBUnit-to-unit variation

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Piezoelectric Ceramic Element Part
    Converts electrical signals into mechanical vibrations through piezoelectric effect
    Material: Lead zirconate titanate (PZT) ceramic
  • Metal Diaphragm Part
    Amplifies vibrations from ceramic element to produce audible sound waves
    Material: Brass or stainless steel
  • Resonance Chamber
    Enhances sound output by creating acoustic resonance
    Material: Plastic housing
  • Electrical Terminals Part
    Provides connection points for power and signal input
    Material: Tin-plated brass

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Piezoelectric Sounder.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 1.5 bar (standard), up to 3 bar for specialized models
other spec: Humidity: 5% to 95% RH non-condensing, Sound Pressure Level: 70-100 dB at 10 cm, Frequency Range: 2-4 kHz typical
temperature: -40°C to +85°C (typical operating range)
Media Compatibility
✓ Indoor air environments ✓ Clean gas monitoring systems ✓ Dry particulate detection applications
Unsuitable: Submerged or high-moisture liquid environments (causes acoustic damping and potential damage)
Sizing Data Required
  • Required sound pressure level (dB)
  • Operating voltage/current specifications
  • Mounting constraints/enclosure dimensions

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Piezoelectric element fatigue cracking
Cause: Cyclic mechanical stress from continuous vibration at resonant frequency, leading to material fatigue and crack propagation in the ceramic element.
Moisture-induced electrical failure
Cause: Water ingress or high humidity causing short circuits, corrosion of electrodes, or degradation of insulation, often due to inadequate sealing or environmental exposure.
Maintenance Indicators
  • Intermittent or distorted sound output, indicating potential element damage or electrical connection issues
  • Visible cracks, discoloration, or moisture accumulation on the sounder body or terminals
Engineering Tips
  • Operate within specified voltage and frequency ranges to avoid overdriving the piezoelectric element, which accelerates fatigue and heating
  • Ensure proper environmental sealing and use in controlled humidity conditions to prevent moisture ingress and corrosion

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
IEC 60068-2-6: Environmental testing - Vibration ISO 3744: Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure EN 61000-6-2: Electromagnetic compatibility (EMC) - Generic standards - Immunity for industrial environments

Quoted from the published standard.

Manufacturing Precision
  • Resonant Frequency: +/- 5%
  • Sound Pressure Level (SPL): +/- 3 dB at 10 cm, 1 kHz
Quality Inspection
  • Impedance Test
  • Sound Pressure Level (SPL) Test

Manufacturers of Piezoelectric Sounder

5 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

BluNet
Ningbo, Zhejiang, CN
CE UL
Also makes: Alarm System, Radar Sensor, Motion Sensor and 3 more
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Piezo Sounder”
View source page ↗ blunet.com.cn · checked 2026-08-22
Changzhou Shenghui Electronic Co., Ltd.
Changzhou, Jiangsu, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Piezo Buzzer”
View source page ↗ shenghui.com · checked 2026-09-05
FBelec
Dongguan, Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “piezo buzzer”
View source page ↗ fbelec.com · checked 2026-08-28
NINGBO SANCO ELECTRONICS CO., LTD.
Ningbo, Zhejiang, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Piezo Sounder”
View source page ↗ sancobuzzer.com · checked 2026-09-09
RHT
Ningbo, Zhejiang, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “- Piezo Buzzers”
View source page ↗ rhtecp.com · checked 2026-09-14

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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Frequently Asked Questions

What is the operating voltage range of this piezoelectric sounder?

The rated voltage range for continuous operation is 3–24 V DC. However, the actual operating voltage should be confirmed with the manufacturer for the specific model, as the sounder's performance may vary outside this range.

What sound pressure level can be expected?

The sound pressure level is typically 85–95 dB, measured at a distance of 10 cm under rated voltage. There is a unit-to-unit variation of ±3 dB, so the actual SPL for a specific unit may differ slightly.

What is the resonant frequency range?

The typical resonant frequency range for alarm tones is 2300–4200 Hz. This frequency is determined by the piezoelectric ceramic and diaphragm assembly and is suitable for audible alerts.

What are the environmental and safety specifications?

The operating temperature range is -40 to 85 °C. The housing material is LCP with a UL 94 V-0 flame retardant grade. The component has an IP rating of IP54 to IP65 per IEC 60529, indicating dust and water resistance. These specifications should be verified for the specific model.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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