20mm Piezo Buzzer Disc

Compact & Loud Alarm Sounder for DIY Projects

The 20mm Piezo Buzzer Disc is a highly efficient, compact, and lightweight sound-producing device ideal for electronic alarms, buzzers, or audio indicators. It uses the piezoelectric effect to generate sound when voltage is applied, making it perfect for battery-powered devices and energy-efficient designs.

This disc is often used in DIY electronics, robotics, Arduino projects, alarm circuits, and toys due to its loud output, compact size, and reliable performance. Designed to be embedded or surface-mounted, it suits applications where space is limited but a noticeable sound is required.

Features & Applications

• Generates a loud and clear tone suitable for alerts and alarms

• Works efficiently with low DC voltage

• Commonly used in timers, game sound feedback, smoke detectors, toys, and buzzers

• Compatible with microcontrollers like Arduino, Raspberry Pi, etc.

• Lightweight and compact for embedded applications

Technical Specifications

• Type: Piezoelectric Buzzer Disc

• Diameter: 20mm

• Thickness: ~0.5mm

• Operating Voltage: Typically 3V to 24V (DC)

• Sound Pressure Level: Around 85-100 dB

• Resonant Frequency: ~4kHz

• Material: Brass base with ceramic disc

• Weight: Approx. 2 grams

• Connection Type: Solderable surface or wire leads

• Polarity: Center is positive, outer ring is negative

Why Choose This Buzzer Disc?

This piezo disc is ideal for developers and hobbyists looking for a cost-effective, durable, and simple-to-use buzzer for sound notifications in compact devices. Its sturdy construction and loud performance make it a reliable choice for electronics and embedded systems.