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
