Φ12*8.5mm split magnetic buzzer , AC type without pin terminal
Application:
Alarm devices
Timers
Confirmation of user input (ex: mouse click or keystroke)
Electronic metronomes
Annunciator panels
Game shows
Sporting events
Household appliances
Description:
A buzzer is a mechanical, electromechanical, magnetic,
electromagnetic, electro-acoustic or piezoelectric audio signalling
device.
A passive buzzer emits a tone when a voltage is applied across it.
It also requires a specific signal to generate a variety of tones.
Difference between two main types of buzzer: active and passive.
A passive buzzer emits a tone when a voltage is applied across it.
It also requires a specific signal to generate a variety of tones.
The active buzzers are a lot simpler to use, so these are covered
here.
An active buzzer can be connected just like an LED, but as they are
a little more robust, you won’t be needing a resistor to protect
them.
Specifications:
| Type | Unit | 12085WG01 | 12085WG03 | 12085WG05 |
| Rated voltage | V | 1.5 | 3 | 5 |
| Operating voltage | V | 1-4 | 3-6 | 4-8 |
| Rated current | mA | ≤30 | ≤30 | ≤30 |
| Coil resistance | Ω | 8±2 | 16±4 | 42±6 |
| Sound output at 10cm | dB | ≥85 | ≥85 | ≥85 |
| Resonant frequency | Hz | 2048 |
| Operating temperature | ℃ | -20~+70 |
| Storage temperature | ℃ | -30~+80 |
| Weight | g | 2 |
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
Frequency response:
