Passive type 9V piezoelectric buzzer Φ30*5mm without oscillator
circuit
Description:
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.
Feature:
• 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:
• 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 | 3005WX |
| Rated voltage | V | 9 |
| Operating voltage | V | 1-30 |
| Rated current | mA | ≤9 |
| Sound output at 30cm | dB | ≥90 |
| Resonant frequency | Hz | 4500 |
| Operating temperature | ℃ | -20~+70 |
| Storage temperature | ℃ | -30~+80 |
| Housing material | ABS |
| Weight | g | 3.5 |
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:
