Product: 16ohm AC Passive Buzzer 50Piece Pack for 3V 5V 9V 12V Systems Key benefits Bulk supply for projects and production: 50 identical buzzers packaged together to support prototyping, small runs, and maintenance replacements. Stable, predictable sound output: 16 ohm impedance provides consistent electrical load and repeatable acoustic response when driven at the appropriate frequency. Flexible voltage compatibility: designed for use with 3V, 5V, 9V, and 12V drive sources, allowing integration with a wide range of control boards and alarm circuits. Passive design for controlled tones: requires an external AC or pulsed drive signal so tone, cadence, and volume can be tailored by the driving circuit. What this product does Functions as an instrumentation alarm sounder. It converts an applied AC or pulsed electrical signal into an audible alert for status indication, alarms, and user feedback. Passive construction means the buzzer does not include an internal oscillator. This allows the driving system to define alert patterns and frequencies for precise signaling needs. Important attributes Impedance: 16 ohm nominal, providing predictable current draw for designing drive circuits and power supplies. Voltage compatibility: suitable for 3V, 5V, 9V, and 12V systems when driven with an appropriate AC or pulsed signal. Quantity: 50 pieces in one pack, suitable for multiple installations or inventory stocking. Stability: manufactured for consistent performance across units, reducing variability in multibuzzer applications. How it helps solve common problems Simplifies inventory management by supplying a uniform set of components for and assembly needs. Enables consistent alert behavior across multiple devices by using a fixed impedance and passive design that responds predictably to the same drive signals. Provides design flexibility by letting controllers or microcontrollers generate custom tones and patterns rather than being limited to an internal buzzer waveform. Typical applications Industrial instrumentation and control panels for status and fault indication. Security and alarm systems where custom tone and cadence are generated by a control board. Educational electronics and DIY projects that require reliable audible feedback driven by microcontrollers or signal generators. Integration notes Must be driven with an AC or pulsed signal; not a selfoscillating unit. Match the drive frequency and duty cycle to achieve the desired tone and sound level. Account for the 16 ohm load when selecting driver transistors or buffer circuits and when sizing power supplies. Package contents 50 units of 16ohm passive AC buzzers, compatible with 3V, 5V, 9V, and 12V driven applications. This product is intended for electronic signaling and instrumentation use.