Piezo Buzzer 3 to 24V HP2312XW

Piezo Buzzer 12V (Active) – HP2312XW

This is an active piezo buzzer with a built-in oscillator—just add DC power and it makes sound (no PWM needed). Rated for 12 V and operates from 3–20 V, it delivers ~85 dB @10 cm around 3.5–4.5 kHz, ideal for alarms, status beeps, and DIY projects.

Active (with oscillator): drives a continuous tone from DC power
Wide voltage: works from 3–20 V DC (12 V rated)
Loud & efficient: ~85 dB @10 cm, 3.5–4.5 kHz
Compact: ~⌀23 mm × 12 mm can, lead-wire type
Low current: typically ≤8 mA at 12 V

Specifications

Series: HP2312XW (internal-driven piezo)
Rated voltage: 12 V DC
Operating range: 3–20 V DC
Sound pressure: ≥85 dB @10 cm (AXW variant)
Resonant frequency: 3.5 kHz ±500 Hz (AXW) or 4.5 kHz ±500 Hz (BXW)
Current (max): ~8 mA @ 12 V
Tone: continuous
Case size: ≈⌀23 mm × 12 mm; lead wires
Operating temp: −20…+70 °C

Note: Your current title says “3–24 V.” The manufacturer’s datasheet specifies 3–20 V operating and 12 V rated. Keep 12 V for best loudness and reliability.

Quick wiring

Direct drive: connect +V to red lead, GND to black lead (it will sound continuously).
MCU control: switch the +V line via an NPN transistor or logic-level MOSFET from Arduino/ESP32; add a diode only if you’re switching inductive loads.
Need a beeper that follows your PWM tone? Use a passive piezo transducer instead of an active buzzer.