Piezo Buzzer, 5-12V, 95dB Sound Output

A piezo buzzer produces sound through the mechanical vibration of a piezoelectric ceramic disc rather than an electromagnetic coil and diaphragm, a construction that tends to be more efficient and longer-lasting for simple tone generation than a traditional electromagnetic buzzer of similar size, while drawing comparatively modest current for the sound output it produces.

This unit is rated at a genuinely loud 95dB sound pressure level, well above the level needed for a clearly audible alert in a typical indoor or workshop environment, at a tone frequency centered around 3900Hz (plus or minus 500Hz) - a pitch range that sits squarely in the frequency band human hearing is most sensitive to, making alerts at this tone noticeably attention-grabbing even at moderate volume. Current draw is a modest 20mA, light enough to drive directly from many microcontroller circuits without needing a separate amplifier stage.

Operating voltage spans a flexible 5 to 12V range, with a 12V rated voltage for peak output, giving compatibility across both common 5V logic-level projects and higher-voltage 12V systems like automotive or larger embedded electronics builds. Unlike an active buzzer with its own internal oscillator, a basic piezo element like this typically needs a driving signal of the appropriate frequency from an external circuit or microcontroller PWM output to produce sound - worth confirming against the specific driving approach a project plans to use.

Operating temperature is rated from -20 to 50C, with storage tolerance down to -30C, giving reasonable headroom for both indoor and lightly exposed project environments. Makers building an alarm system, a notification chime, a simple audible alert for a sensor-triggered event, or any project needing a loud, attention-getting tone will find this piezo buzzer a straightforward, inexpensive sound-output component.