Φ30mm active piezo buzzer intermittent with 55mm wire and connector
for auto
Description:
This interrupted buzzer is customized for our client.
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.
Piezo buzzer is an electronic device commonly used to produce
sound. Light weight, simple construction and low price make it
usable in various applications like car/truck reversing indicator,
computers, call bells etc.
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) |
Specifications:
| Resonant frequency(KHz) | 2.8±0.5 |
| Rated voltage(VDC) | 12.0 |
| Operating voltage(VDC) | 5~36 |
| Max. current consumption at rated voltage(mA) | 20 |
| Tone | Interrupted |
| T/ON | 0.5S±0.2S |
| T/OFF | 0.5S±0.2S |
| Min. sound output at 100cm at rated voltage(dB) | 90±10 |
| Operating temperature(℃) | -20~+60 |
| Storage temperature(℃) | -30~+70 |
| Environment protection regulation | RoHS |
| Buzzer soldering process | Soldering parameter |
| Temp.(℃) | Times(Sec.) | Times |
| Inclusive lead | Reflow soldering | 230±10 | Above 170℃ time 40~70 | 2 |
| Wave soldering | 245±5 | 3~6 | 1~2 |
| Manual soldering | 330±10 | 1~2 | 1~2 |
| Lead free | Reflow soldering | 245±15 | Above 180℃ | 3 |
| Wave soldering | 260±5 | 4~8 | 2~3 |
| Manual soldering | 350±10 | 1~3 | 2~3 |
Dimension: (mm)
