DC type piezoelectric buzzer for security door alarming Φ23*12mm
Description:
A buzzer can be either AC or DC operated and can be mounted
anywhere according to the need and purpose. When used as an alarm
device, the buzzer is usually mounted on a control panel. The
latest technological developments have led to using buzzers in
sirens and signals for a wide range of applications.
The piezo electric emits a high-pitch beep that is sure to capture
everyone’s attention! To use them, you’ll need to match the wire
colors to the wires from the battery pack. If the volume is too
loud, simply use a piece of tape over the top hole on the buzzer
and the volume will substantially lower.
Feature:
• High-performance buzzers that employ unimorph piezoelectric
elements and are designed for easy incorporation into various
circuits.
• 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:
| Type | Unit | 2312YX |
| Rated voltage | V | 3.5 | 5 | 6 |
| Operating voltage | V | 2-4 | 4-6 | 3-9 |
| Rated current | mA | ≤60 | ≤60 | ≤10 |
| Sound output at 30cm | dB | ≥85 | ≥90 | ≥85 |
| Resonant frequency | Hz | 3300±500 | 3400±500 | 3300±500 |
| Operating temperature | ℃ | -20~+60 |
| Housing material | ABS |
| Weight | g | 14 |
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.
| Piezo buzzer | Magnetic buzzer |
| Start method | Piezoelectric effect | Electro-magnetic effect |
| Size | Big (10-50mm) | Small(6-25mm) |
| Resonant frequency | High(2-6KHz) | Low(1-3KHz) |
| Operating voltage | High(9-24V) | Low(1.5-12V) |
| Sound level | Louder(85-120dB) | Lower(70-95dB) |
| Current consumption | Low(5-20mA) | High(35-60mA) |
Dimension: (mm)
Tolerance: ±0.5
Continuous tone
Frequency response:
