# Piezoelectric Ceramic Buzzer

- Link: https://robonixkart.com/product/piezoelectric-ceramic-buzzer/
- Published: 2026-10-02T08:54:52+00:00
- Author: admin

### 20mm Piezoelectric Ceramic Buzzer – Compact Sound Generator for Alarms and Notifications

The **20mm Piezoelectric Ceramic Buzzer** is a compact and lightweight audio transducer
that produces a clear and sharp sound when an AC voltage is applied. It is ideal
for use in **buzzers, alarms, timers**, and **electronic notification systems**.
This passive buzzer requires an external driving signal (typically square wave) 
and is commonly used in **Arduino**, **ESP32**, and **embedded electronics projects**.

#### Key Features:

 * **Compact Size**: Small 20mm diameter makes it suitable for space-constrained
   applications.
 * **Piezoelectric Element**: Generates sound via ceramic vibration, offering low
   power consumption.
 * **Clear & Loud Sound**: Produces an audible tone in the **2kHz – 4kHz** range.
 * **Passive Buzzer**: Requires a square wave signal to produce sound, allowing 
   control over frequency and tone.
 * **Easy to Mount**: Lightweight and suitable for PCB or panel mounting.

#### Product Specifications:

  |  Feature |  Specification |  
   |  Diameter |  20mm |  
 |  Type |  Piezoelectric Passive Buzzer |  
 |  Rated Voltage |  3V – 24V AC (typical use at 5V or 12V) |  
 |  Resonant Frequency |  ~2.7kHz – 4kHz |  
 |  Sound Pressure Level |  ≥85 dB @ 10cm (depending on drive) |  
 |  Drive Type |  Requires external square wave signal |  
 |  Material |  Piezoelectric Ceramic Disc |  
 |  Operating Temperature |  -20°C to +70°C |  
 |  Mounting Type |  Through-Hole or Adhesive Backing |

#### Applications:

 * Buzzer Systems in Alarms and Alerts
 * Timers and Notification Devices
 * Toy and Game Sound Effects
 * Embedded Electronics Projects
 * DIY Arduino and Robotics Projects