FT-20B-71E

RYD FT-20B-71E is a Ø20.0mm piezoelectric ceramic buzzer disc with brass plate for compact sound indication in control panels, home appliances and portable devices. The element resonates at 7.1±0.7kHz with maximum resonant impedance of 300Ω and static capacitance of 15.0nF at 100Hz, producing a clear high-pitched notification tone while accepting up to 30Vp-p input over -20℃ to +70℃. The 0.20mm brass plate and 0.45mm total thickness give a robust yet compact structure that mounts easily into small housings and panels. Customization available: resonant frequency and impedance can be adjusted via dimension tuning, electrode pattern and lead wire connection are configurable, protective coating on the ceramic surface can be applied per your design, and waterproof or dustproof options are available for demanding environments; new designs can be developed for volume projects. Target scenarios: control panels, household appliances, consumer electronics, IoT terminals and alarm equipment.