A 5V Active Piezoelectric Buzzer (Mini PCB Mount Alarm Speaker) is an audible signaling component designed to generate a continuous high-pitched alert tone when supplied with a direct current (DC) voltage. Unlike passive buzzers that require an external PWM frequency signal, this active buzzer contains an integrated oscillator circuit. Applying a constant DC voltage across its pins automatically produces an audible tone at approximately 2.3 KHz. Housed in a compact black plastic casing with through-hole pins, it comes equipped with a protective top seal sticker that shields internal components during wave-soldering and PCB cleaning.

This product is featured by Famephase Electronic Accessories as an essential sound transducer for alarm systems, micro-controller status indicators, timers, and user-feedback beepers.