DC type 12V 4500Hz piezoelectric buzzer Φ23*16mm for car alarming

Description:

A buzzer is used in the domestic, official and industrial fields and it has almost entirely replaced the electro-mechanical bell. In houses and offices, the buzzer is used to catch the attention of people. In the industrial arena, it is mostly used as an alarm device.

A piezo buzzer generates sound because of the piezoelectric effect from the piezoelectric ceramic which drives the metallic diaphragm to vibrate.

Feature:

• High-performance buzzers that employ unimorph piezoelectric elements and are designed for easy incorporation into various circuits.
• They feature extremely low power consumption in comparison to electromagnetic units.
• Because these buzzers are designed for external excitation, the same part can serve as both a musical tone oscillator and a buzzer.
• They can be used with automated inserters.Moisture-resistant models are also available. The lead wire type with both-sided adhesive tape installed easily is prepared.

Application:

Electric ranges, washing machines, computer terminals, various devices that require speech synthesis output.

Specifications:

Difference between piezo buzzer & magnetic buzzer:

A piezo buzzer generates sound because of the piezoelectric effect from the piezoelectric ceramic which drives the metallic diaphragm to vibrate.

A magnetic buzzer is based on the electromagnetic principle, the metal diaphragm is pulled when input the power, and spring back without power.

The piezo buzzer is driven by square waves, and the magnetic buzzer needs 1/2 square waves to drive.

We suggest inputting higher voltage for a piezo buzzer, normally over 9V to have enough SPL. On the other hand, a magnetic buzzer can be driven to generate 85 dB by only 1.5V, but the consumption of the current will be much higher than Piezo one.

To compare the two types of buzzers, the magnetic type can have lower frequency response with the same dimension.

Though being limited by the dimension, the SPL of a magnetic buzzer can only reach to 90 dB. The piezo buzzer can achieve the SPL of 120 dB in some spec., some larger size can also easily reach to 100 dB.

Precautions for use:
• 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 piezo- electric buzzer.
• 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.
• Do not apply any mechanical force to the piezoelectric buzzer; otherwise the case may deform and result in improper operation.
• Be sure to solder the buzzer terminal at 350℃ max.(80W max.)(soldering iron trip) within 5 seconds using a solder containing silver.
• Be careful not to drop the piezoelectric buzzer.

Dimension: (mm)

Tolerance: ±0.5

Continuous tone

Frequency response: