Product Details:
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| Other Name: | Magnetic Door Buzzer | Rated Voltage: | 1.5V; 3V; 5V |
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| Resonant Frequency: | 2048Hz | Rated Current: | Max.30mA |
| Sound Pressure Lever: | Min.85dB/10cm | Weight: | 2g |
| Highlight: | electromagnetic buzzer,smd magnetic buzzer |
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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:
Contact Person: Mr. Roy Zhang
Tel: 86 574 55878090
Fax: 86-574-55878097
