Split pin terminal type buzzer , Φ12*8.5mm AC type without
oscillator circuit
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.
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.
Application:
• Medical equipment: glucose meter for blood, temperature test
instrument, ECG monitor, fetal heart tester, blood glucose meter
• Home appliances: refrigerator, washing machine, computer, air
conditioner, telephone, microwave oven, oven, TV set, keychain
• Electronic products: mobile phone, remote control, anti-lost
device, POS machine, electronic toy, robot, watch, facial massager,
instruments and apparatuses, unmanned aerial vehicle
• Security equipment: warning lights, anti-theft electronic locks,
safety equipment and sirens/alarms/car alarm.
Specifications:
| Type | Unit | 12085W01 | 12085W03 | 12085W05 |
| 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:
