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Piezoelectric Sounder Hydz D22H7 - Low Power, High Reliability | China Suppliers & Factory
⚡ Electrical Characteristics
| Part No：HYR-2240A | ||
| 1 | Resonance Frequency (KHz) | 4.0 |
| 2 | Max Input Voltage (Vp-p) | 30 |
| 3 | Capacitance at 120Hz (nF) | 28,000±40% at 120Hz |
| 4 | Sound Output at 10cm (dB) | ≥85 at 4.0KHz Square Wave 12Vp-p |
| 5 | Current Consumption (mA) | ≤5 at 4.0KHz Square Wave 12Vp-p |
| 6 | Operating Temperature (℃) | -20～+70 |
| 7 | Storage Temperature (℃) | -30～+80 |
| 8 | Weight (g) | 0.7 |
| 9 | Housing Material | Black PBT |
📐 Dimensions and Material (unit: mm)
⚠️
Tolerance：±0.5mm Except Specified
📋 Notice (Handling)
- 🔵 Do not apply DC bias to the piezoelectric buzzer; otherwise insulation resistance may become low and affect the performance.
- 🔵 Do not supply any voltage higher than applicable to the piezoelectric buzzer.
- 🔵 Do not use the piezoelectric buzzer outdoors. It is designed for indoor use. If the piezoelectric buzzer has to be used outdoors, provide it with waterproofing measures; it will not operate normally if subjected to moisture.
- 🔵 Do not wash the piezoelectric buzzer with solvent or allow gas to enter it while washing; any solvent that enters it may stay inside a long time and damage it.
- 🔵 A piezoelectric ceramic material of approximately 100µm thick is used in the sound generator of the buzzer. Do not press the sound generator through the sound release hole otherwise the ceramic material may break. Do not stack the piezoelectric buzzers without packing.
- 🔵 Do not apply any mechanical force to the piezoelectric buzzer; otherwise the case may deform and result in improper operation.
- 🔵 Do not place any shielding material or the like just in front of the sound release hole of the buzzer; otherwise the sound pressure may vary and result in unstable buzzer operation. Make sure that the buzzer is not affected by a standing wave or the like.
- 🔵 Be sure to solder the buzzer terminal at 350°C max. (80W max.) (soldering iron trip) within 5 seconds using a solder containing silver.
- 🔵 Avoid using the piezoelectric buzzer for a long time where any corrosive gas (H2S, etc.) exists; otherwise the parts or sound generator may be corroded and result in improper operation.
- 🔵 Be careful not to drop the piezoelectric buzzer.
❓ Frequently Asked Questions (FAQ)
Q
What is the resonance frequency of the HYR-2240A piezoelectric buzzer?
The HYR-2240A has a resonance frequency of 4.0 KHz, which is the optimal operating frequency for achieving maximum sound output performance.
Q
What is the maximum input voltage for the HYR-2240A?
The maximum input voltage is 30 Vp-p. Supplying any voltage higher than this specification may damage the piezoelectric buzzer and cause improper operation.
Q
Can the HYR-2240A piezoelectric buzzer be used outdoors?
The HYR-2240A is designed for indoor use. If outdoor use is required, appropriate waterproofing measures must be provided, as moisture exposure will cause the buzzer to not operate normally.
Q
What is the operating temperature range of the HYR-2240A?
The HYR-2240A operates within a temperature range of -20°C to +70°C. For storage, the acceptable temperature range is -30°C to +80°C.
Q
What soldering conditions are recommended for the HYR-2240A buzzer terminals?
Soldering should be performed at a maximum temperature of 350°C (80W max.) within 5 seconds using a silver-containing solder. Exceeding these conditions may damage the buzzer.
Q
What is the sound output level of the HYR-2240A and how is it measured?
The sound output of the HYR-2240A is ≥85 dB, measured at a distance of 10 cm under a 4.0 KHz square wave signal at 12 Vp-p input. Current consumption under the same conditions is ≤5 mA.