85dB SMD 3V magnetic surface mounted buzzer for TV 8.5*8.5*3mm
Description:
A magnetic buzzer is based on the electromagnetic principle, the
metal diaphragm is pulled when input the power, and spring back
without power. And a passive buzzer emits a tone when a voltage is
applied across it. Because it does not have built-in oscillating
source, so it will not tweet if DC signals are used; instead, you
need to use square waves whose frequency is between 2K and 5K to
drive it.
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.
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(Magnetic and Piezo buzzer), 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) |
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 | 8530WS |
| Rated voltage | V | 3 |
| Operating voltage | V | 2-5 |
| Rated current | mA | ≤90 |
| Coil resistance | Ω | 16±3 |
| Sound output at 30cm | dB | ≥85 |
| Resonant frequency | Hz | 2700 |
| Operating temperature | ℃ | -20~+70 |
| Storage temperature | ℃ | -30~+80 |
| Weight | g | 1.5 |
Dimension: (mm)
Tolerance: ±0.5
Continuous tone
Frequency response:
