Overview
A piezo buzzer is a miniature electroacoustic transducer that generates sound when an alternating voltage is applied to its piezoelectric element. Widely adopted in industrial and consumer electronics, these devices are valued for their simplicity, durability, and cost-effectiveness. Unlike magnetic buzzers, piezo variants require no coils or moving parts, making them resistant to wear. Their typical sound output ranges from 2–4 kHz, with variants available for specific frequency requirements. SMD (surface-mount) models dominate modern PCB designs due to space efficiency.
Structure and Working Principle
The core component is a piezoelectric ceramic disc bonded to a metal plate. When voltage is applied, the ceramic deforms, causing the metal plate to vibrate and produce sound waves. The housing—often ABS plastic—acts as a resonant chamber to amplify volume. Drive circuits can be self-oscillating (integrated oscillator) or external-drive (requires PWM signal). Self-oscillating models are plug-and-play but offer limited frequency control, while external-drive types allow precise tone modulation for complex alert patterns.
Key Features
Modern piezo buzzers operate at low currents (typically <10mA), making them ideal for battery-powered devices. Sound pressure levels range from 70–95 dB at 10 cm distance, with higher dB models used in noisy environments. Temperature tolerance spans -20°C to +70°C for standard units, with industrial-grade variants surviving -40°C to +85°C. Encapsulation designs include waterproof (IP67) options for outdoor equipment. Lead-free models comply with RoHS and REACH regulations.
Application Areas
Primary applications include household appliances (microwaves, smoke detectors), automotive dashboards (seatbelt reminders), and medical devices (infusion pumps). Industrial uses encompass machinery fault alerts and access control systems. In IoT devices, miniature SMD buzzers provide haptic feedback and low-power alerts. Customizable frequencies (e.g., 2.7 kHz for fire alarms) allow compliance with industry sound standards. Recent designs integrate LED indicators for dual visual/auditory signaling.
Maintenance and Precautions
Avoid DC voltage application beyond 1 second, which can depolarize the ceramic element. Mechanical stress from PCB bending or impacts may crack the ceramic disc, requiring shock-absorbent mounting in high-vibration environments. For cleaning, use isopropyl alcohol instead of water unless IP-rated. Storage should be in anti-static bags at <40°C humidity. Lifespan averages 50,000 hours at rated voltage, halving for every 20% voltage overdrive.
B2B Procurement Guide
Specify operating voltage (3V, 5V, 12V common), sound frequency, and SPL requirements. MOQs start at 1,000 units for standard models, with 8–12 week lead times for custom frequencies or connectors. Verify supplier certifications like ISO 9001 and IATF 16949 for automotive-grade units. Testing should include 100% sound output checks and batch sampling for frequency accuracy (±500 Hz tolerance). Top manufacturing clusters are in Shenzhen (China), Taiwan, and Japan, with unit prices dropping 15–30% for orders >50,000 pieces.
Related Manufacturers
- 主营：蜂鸣器
- 主营：蜂鸣器、蜂鸣片、喇叭
- 主营：报警器、电磁无、通信设备、蜂鸣器、电磁式无源蜂鸣器、电磁有源蜂鸣器、蜂鸣器模块、压电电磁蜂鸣器、压电蜂鸣器、9650蜂鸣器、报警器压电蜂鸣器、高精密无源蜂鸣器、5120R压电蜂鸣器、无源蜂鸣器、智能家居、仪器仪表、精密行星、家电产品、报警系统、通讯设备、家用电器、安全监控、定制音调、疏散系统、车载电子
- 主营：主机喇叭、玩具喇叭、电声器件、蜂鸣器、贴片喇叭、手表喇叭、麦拉喇叭、麦克风咪头、水滴加湿器、液晶显示器、传声器咪头、逆流加湿器、电视机广告机、加湿器雾化片、数码喇叭定制、补差专用补邮、喇叭电子器件、喷雾器消毒枪、紫外线消毒枪、全指向麦克风、超声波传感器、智能门锁指纹锁、门锁安防扬声器
- 主营：smaj6.0ca、hef4040bt、ld7750rgr、5020无源蜂鸣器、gl850g-37、锂电池、stn1hnk60、hef4046bt、sy7201abc、fds4435bz、nce60p04y、aw8145csr、ika15n60t、iso7721dr、stp20nm60、nce01p13k、hef4081bt、lm3150mhx、sy7203dbc、max485esa、irf840pbf、fdms6681z、1318183-1、max660esa、bq32000dr、74hc123pw
- 主营：隔离电源模块、双隔离稳压、隔离电源、模块电源
- 主营：吹风机、吸尘管、通风管、倒车蜂鸣器、换气扇、排气管、铝合金、活性炭、钢丝管、风帘机、排风管、引风机、风幕机、鼓风机、出风口、净水器、排气扇、过滤器、防雨罩、冷风机、风管机、排风扇、金鼓风、过滤嘴、砂滤罐、旋涡气泵
- 主营：遥控器、混水阀、压力计、蜂鸣器、喷雾器、出气阀、开关线、刻磨机、供水器、缓冲器、甩干机、起重机、砂轮机、差压计、压缩机、制动器、充气宝、变压器、热水器、编码器、传动带、阻尼器、加湿器、脱水机、测试仪、差压表
- 主营：贴片蜂鸣器、电磁无源蜂鸣器、电磁有源蜂鸣器、压电无源蜂鸣器、压电有源蜂鸣器
- 主营：汽车连接器、连接器、Ic、TE泰科连接器、HuLane胡连连接器
- 主营：PC、PA66、PC/PBT、PP、POM、PBT、奇美PA-757、燕山K8303、云天化M90、杜邦500P
- 主营：wmsod-323、wcsod-123、a6sod-123、贴片、sesod-123、wxsod-123、wdsod-323、x4sod-123、6hsod-123、6csod-123、4zsod-123、mmbd4148t、mmbd4148a、3esod-323、蜡烛灯、wgsod-123、5psod-123、y2sod-323、稳压管、wnsod-123、d6sod-123、sksod-123、mmsz5244b、c0sod-323、5nsod-123、4fsod-123
- 主营：ne3503m04、ne3512s02、sp0503bah、蜂鸣器、iso1044bd、lt8410edc、保险丝、比较器、b02p-vl-r、ase5s4010、触发器、解码器、thvd1500d、thvd1451d、sy8032abc、hip2100ib、opa4172id、连接器、mx1a-11nw、lshd-7501、ths4531id、二极管、hsmm-c170、tps22914b、lf353dre4、装原封
- 主营：芯片、集成IC、TI、蜂鸣器PS1240P02CT3、ST、NXP、ADI、tlc354cpw、b3u-1000p、衰减器、pcb批量、a991-2015、a999-3283、多层板、b140af-13、a999-3530、733910070、放大器、a999-3323、2474r-25l、制pcb板、国内pcb、多层pcb、逆变器
- 主营：费斯托电磁阀、FESTO气缸、ASCO电磁阀、IDEC蜂鸣器材质寿命、喜开理气缸、CAMOZZI电磁阀、派克软管、THK、诺冠电磁阀、意大利SIRAI电磁阀、贺德克蓄能器、易福门传感器、罗克韦尔、宝德电磁阀、Atos溢流阀、Aventics气缸、danfoss压力开关
- 主营：报警探测器、报警主机、震动探测器、高分比蜂鸣器、报警柱、防爆探测器、一键报警、泄漏电缆、微震动探测器、振动电缆、脉冲电子围栏、激光对射、张力围栏、定位型振动光纤、安防雷达、可视对讲、水域雷达、振动光纤、校园防欺凌报警、防破坏型振动光纤、雷视一体机、防爆烟感、防爆震动、网络对讲、井盖报警器、周界雷达
- 主营：花边梁、卷扬机、反光吊带、蜂鸣器、隧道施工、左开道岔、轨道接头、双钩链条、吊车垫木、支架液压枪、喇叭包胶辊、矿用自救器、弹簧扳道器、轨道防腐枕木、单体支柱柱帽、自救一体装置、单体支柱升柱器、液压支柱防倒带、紧急避险安全门、无压风门、托辊、防火栅栏两用门、避难硐室门
- 主营：玻璃矿物、POM塑胶原料、PA66塑胶原料、TPV蜂鸣器、LCP塑胶原料、PA12塑胶原料、PA6塑胶原料、ABS塑胶原料、PC/ABS塑胶原料、PPO塑胶原料、PMMA亚克力、PA9T工程塑料、PBT工程塑料、沙林料、PC塑料、PVA降解塑料、TPU弹性体、TPEE塑胶原料
- 主营：ckd气缸、ckd气控、asco脉冲、IDEC蜂鸣器功能、无杆气缸、ab伺服电机、气体遮蔽阀、紧急开放阀、吸附式干燥器、ASCO电磁阀、费斯托电磁阀、FESTO气缸、诺冠电子压力开关、贝加莱模块、博力谋、Hydac压力传感器、霍尼韦尔限位开关、伊顿叶片泵、Origa无杆气缸、邦纳传感器、Pilz继电器、松下传感器、阿托斯液压阀
- 主营：利达消防、海湾消防、北大青鸟消防、诺帝菲尔消防报警、霍尼韦尔消防、探测器、编码器、控制模块、主机维修、监视模块、输出模块、防爆感烟、气体灭火、消防设备、消防主机、感温电缆、手动报警、报警主机、手报按钮、防爆烟感、智能应急、多线控制卡、声光报警器、可燃气体探测器、红外火焰探测器
- 主营：护照阅读器、证件采集仪、车牌识别相机、旅行社护照录入系统
- 主营：压力器、报警器、传感器、蜂鸣器、油管接头、扣压接头、行程开关、过度接头、倒警喇叭、防汛警报器、喇叭扬声器、保养指示器、高分贝喇叭、膨胀副水箱、不锈钢接头、语音提示器、空气滤清器、举升报警开关、气体探测报警、进气阻力报警、行程报警开关、液压快速接头、副水箱水位电极、JK-E水位控制仪、水位控制仪
- 主营：蜂鸣器、贴片蜂鸣片、电磁蜂鸣器、喇叭扬声器