2310E Active Piezoelectric Active Buzzer

High-Voltage Piezo Active Acoustic Module for Industrial Bus Integration:

Native 12VDC operation with 3–24V survival range — spans automotive, industrial, and battery-backup architectures without voltage conversion

Built-in oscillator circuit — fixed 3500 Hz tone upon DC application; zero MCU PWM resources or external drive components required

Exceptional acoustic efficiency — sample batch measures 91–94 dB, 6–9 dB above ≥85 dB specification threshold

Ultra-low 4 mA current draw at 12V — 96% lower power burden than electromagnetic active alternatives of comparable output

23 mm diameter piezoelectric diaphragm with wire-lead and mounting ears — flexible installation for panel-mount and chassis applications

Black ABS housing with 260 ℃ wave-solder and 350 ℃ manual-rework tolerance

Typical Applications

Industrial PLC and HMI alarm modules — fault indication, cycle completion, and emergency-stop audible feedback on 12V/24V control buses; zero EMI preserves analog sensor accuracy

Automotive 12V accessory systems — seatbelt warnings, door-ajar alerts, and key-in-ignition chimes; 3V cold-crank survival ensures reliable activation during engine start

Uninterruptible power supply (UPS) units — battery-mode activation, overload warnings, and maintenance alerts; 4 mA draw preserves backup battery capacity

Solar charge controllers and inverters — array fault tones, battery disconnect alerts, and load-shedding notifications in 12V/24V off-grid installations

Agricultural and construction machinery — operator presence alarms and hydraulic fault indicators; 75 ℃ operating limit accommodates engine-compartment proximity

Medical and laboratory equipment — sterilization-cycle completion, calibration timeout, and error-condition alerts; piezoelectric construction eliminates magnetic interference with sensitive instrumentation

FAQ

1. Does the 2310E Active Piezoelectric Active Buzzer require an external oscillator or microcontroller drive signal?

No. The HND-2310E is a fully self-contained active buzzer. An internal oscillator circuit generates the 3500 Hz drive signal upon application of DC voltage within the 3–24V range. No PWM output, square-wave generator, or timing components are required. Simply connect the positive lead to your voltage source and the negative lead to ground (or switching transistor) to produce audible output.

2. How does the 3–24V operating range affect sound pressure and current across different voltages?

Sound pressure increases approximately linearly with voltage from 3V to 12V, reaching the rated ≥85 dB at 12V. Below 6V, output may be marginal for noisy environments; above 12V, SPL continues to rise modestly but current consumption remains below 4 mA due to the piezoelectric capacitive load. At 24V, the internal oscillator current-limits to protect the drive IC; SPL is approximately 3–4 dB above 12V rating. For consistent performance, MEIDI recommends 9–15V operating range.

3. Can I use the HND-2310E in a 24V industrial system without additional components?

Yes, directly. The 24V maximum is a continuous operating rating, not merely a survival limit. At 24VDC, current consumption remains ≤4 mA and the internal oscillator maintains 3500 Hz output. No series resistor, zener clamp, or regulator is required. This distinguishes the HND-2310E from electromagnetic active buzzers that typically require voltage dropping above their 12V or 16V maximum.

4. What is the practical acoustic lifetime under continuous 12V operation at 75 ℃?

Expected minimum 5, 000 hours at 12V and +75 ℃ ambient. The primary wear mechanism is piezoelectric ceramic depolarization under sustained DC bias and thermal stress. For intermittent duty (e.g., 2-second alert every 60 seconds), lifetime extends proportionally beyond 50, 000 hours. For continuous alarm applications in high-temperature environments, MEIDI recommends implementing a 50% duty cycle (1 second on, 1 second off) to preserve ceramic polarization and extend lifetime beyond 15, 000 hours.

5. What mounting options does the wire-lead with mounting ears configuration provide?

The HND-2310E features flexible lead wires (typically 80–100 mm) with mounting ears integrated into the ABS housing. This configuration supports:
Panel-mount — secure via M2.5 or M3 screws through the mounting ears for front-panel alarm indicators
Chassis-mount — attach to metal frames or brackets in automotive and machinery applications
PCB-adjacent installation — route leads through chassis openings to PCB terminal blocks or connector headers, eliminating direct PCB soldering stress
Free-hanging — leads with connector terminals for modular replacement in serviceable equipment
The mounting ears provide mechanical strain relief independent of the electrical connections, reducing vibration-induced fatigue compared to through-hole pin mounts.