PZT Piezo Buzzer Discs with PVC Wires – Customizable 27mm/35mm Diameter

Description

The PZT Piezo Buzzer Discs are bare piezoelectric diaphragms consisting of a ceramic layer bonded to a brass substrate, supplied with pre-attached PVC-insulated wire leads for immediate connection. Available in 27mm and 35mm diameters, these larger elements are suited for applications requiring higher sound pressure output or broader tonal response than smaller discs.

The 27mm variant is optimized for a 4.6 kHz resonant frequency, while the 35mm variant resonates at 2.8 kHz . These lower frequencies produce deeper tones than the 12mm/15mm discs, making them suitable for speech and music reproduction, alarm sirens, and larger drum triggers . The PVC wire insulation provides flexibility and basic protection for routing in enclosures.

Critical limitations: These elements do not produce sound with DC voltage alone—they require an AC signal or microcontroller-generated square wave at or near the resonant frequency. Murata explicitly warns that applying DC voltage for long periods may cause silver migration and permanent damage . For sensor use, the output is a high-impedance voltage spike requiring signal conditioning. The lead wires are fragile—do not pull or sharply bend them, as the solder joint may separate .

Features

• Two Larger Sizes: 27mm (4.6 kHz resonance) and 35mm (2.8 kHz resonance) for higher sound pressure and deeper tones .

• Pre-Attached PVC Wires: Saves soldering time and simplifies connection to breadboards and PCBs.

• Dual Function: Can generate sound (with external drive) or detect vibration/impact (generating voltage).

• Wide Tonal Response: Suitable for speech and music applications, not just simple beeps .

• Low Power Consumption: Piezoelectric elements draw minimal current when driven.

• Brass Substrate: Durable construction with good conductivity .

• RoHS Compliant: Lead-free construction for environmentally sensitive applications.

Technical Specifications