The MEIDI HND-1475 is a compact piezoelectric active buzzer with an integrated oscillator circuit. Designed for DC operation, it produces a continuous 4000±500Hz tone when the rated voltage is applied, eliminating the need for an external PWM or signal-generation circuit.
The HND-1475 operates from a 4–8VDC supply with a 5VDC rated voltage, consuming Max. 10mA at rated conditions. It delivers Min. 85dB sound pressure at 5VDC measured at 10cm. The Φ14×7.5mm black PBT housing and approximately 1.3g weight make this piezoelectric active buzzer suitable for space-constrained equipment such as handheld devices, small appliances, and embedded control modules.
Built-in oscillator — DC drive eliminates the need for external PWM or oscillator circuitry
Continuous tone output — factory-set 4000±500Hz continuous tone
Low current consumption — Max. 10mA at 5VDC rated voltage
4–8VDC operating range — supports 5V nominal and nearby supply rails
Compact PBT housing — Φ14×7.5mm form factor for dense PCB layouts
| Parameter | Value | Test Conditions |
| Product Type | Piezoelectric Active Buzzer | — |
| Rated Voltage | 5 VDC | — |
| Operating Voltage | 4–8 VDC | DC supply range |
| Rated Current | Max. 10 mA | At 5VDC |
| Sound Pressure Level | Min. 85 dB | At 5VDC, 10cm |
| Operating Frequency | 4000 ±500 Hz | Continuous tone |
| Tone Type | Continuous | — |
| Operating Temperature | -20℃ ~ +70℃ | Continuous |
| Storage Temperature | -30℃ ~ +80℃ | Non-operating |
| External Dimensions | Φ14 ±0.2 × 7.5 ±0.3 mm | Body only, per dimension drawing |
| Total Height with Pins | 13.8 ±0.3 mm | Per dimension drawing |
| Pin Spacing | 7.6 ±0.2 mm | Per dimension drawing |
| Pin Diameter | 2-Φ0.7 ±0.1 mm | Per dimension drawing |
| Net Weight | Approx 1.3 g | — |
| Housing Material | PBT | Black |
| Environmental Compliance | RoHS | — |
Small electronic devices — handheld instruments, portable meters, and battery-powered equipment
Home appliances — status alerts, timer completion tones, and fault notifications
Embedded control modules — microcontroller-driven alert outputs requiring simple DC drive
Security sensors — compact intrusion and status indicators
Office equipment — printer and scanner status tones
| Design Requirement | HND-1475 Advantage |
| Simple drive circuit | Built-in oscillator operates from DC voltage; no external PWM required |
| Compact size | Φ14×7.5mm body for space-constrained designs |
| Low current draw | Max. 10mA at 5VDC for battery and low-power systems |
| Wide supply margin | 4–8VDC operating range accommodates supply variation |
| Through-hole mounting | Pin leads suit standard PCB assembly processes |
MEIDI manufactures the HND-1475 piezoelectric active buzzer under controlled production processes. Each production lot undergoes:
Frequency verification — operating frequency test at 4000±500Hz
SPL verification — sound pressure verification at 5VDC, 10cm
Current consumption test — Max. 10mA check at rated voltage
Dimensional inspection — Φ14±0.2 × 7.5±0.3mm body and pin-layout check
Reliability testing — including 96-hour life test, +80℃ high-temperature storage, -30℃ low-temperature storage, 48-hour humidity exposure at +40℃/90–95%RH, 10-cycle temperature shock (+70℃↔-20℃), 1.2m drop test, and multi-axis mechanical vibration
Products are manufactured with RoHS-compliant materials. Contact MEIDI for detailed quality documentation and test reports.
1. Does the HND-1475 require an external oscillator or PWM signal?
No. The HND-1475 is a piezoelectric active buzzer with a built-in oscillator. It produces a continuous tone when DC voltage within the rated range is applied across the power leads.
2. What voltage should I use to drive the HND-1475?
The rated voltage is 5VDC, and the operating range is 4–8VDC. For rated sound output and current consumption, drive at 5VDC. The buzzer will operate across the full 4–8VDC range with varying SPL and current.
3. What is the pin configuration of the HND-1475?
The HND-1475 has two through-hole pins spaced 7.6±0.2mm apart with a diameter of 2-Φ0.7±0.1mm. Polarity must be observed for DC operation. Refer to the dimension drawing for detailed mechanical layout.
4. Can the HND-1475 be driven by a microcontroller GPIO?
The HND-1475 draws Max. 10mA at 5VDC. Many microcontroller GPIO pins can source or sink this current directly, but a transistor buffer is recommended for reliable operation and to protect the GPIO. Contact MEIDI for a recommended drive circuit.
5. What environmental tests has the HND-1475 passed?
The source specification lists life test, high-temperature storage at +80℃, low-temperature storage at -30℃, humidity exposure, temperature shock, drop test, and mechanical vibration test. Contact MEIDI for detailed test reports.
For technical datasheets, drive circuit application notes, or OEM configuration discussion, contact MEIDI. Product specifications and qualification documentation are available under mutual NDA.
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No.6, Wenlin Road, Chenbao Town, Xinghua City, Jiangsu Province, China
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