5*5*2.5mm external drive type SMD magnetic buzzers with 4000Hz 3V
Description:
SMD magnetic buzzer features in small volume, light weight,
convenient installation,especially in low voltage but high sound.
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.
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:
Widely used in computers, printers, photocopiers, alarms,
electronic toys, automotive electronic devices, telephones, timers
and other electronic products for voice devices
Specifications:
| Type | Unit | 5025WS |
| Rated voltage | V | 3 |
| Operating voltage | V | 2-4 |
| Rated current | mA | ≤100 |
| Coil resistance | Ω | 12±3 |
| Sound output at 30cm | dB | ≥78 |
| Resonant frequency | Hz | 4000 |
| Operating temperature | ℃ | -20~+70 |
| Storage temperature | ℃ | -30~+85 |
| Weight | g | 1 |
Precautions for use:
• Do not apply DC bias to the buzzer; otherwise insulation
resistance may become low and affect the performance.
• Do not supply any voltage higher than applicable to the buzzer.
• Do not use the buzzer outdoors. It is designed for indoor use. If
the buzzer has to be used outdoors, provide it with waterproofing
measures; it will not operate normally if subjected to moisture.
• Do not wash the buzzer with solvent or allow gas to enter it
while washing; any solvent that enters it may stay inside a long
time and damage it.
• Do not apply any mechanical force to the buzzer; otherwise the
case may deform and result in improper operation.
• Do not place any shielding material or the like just in front of
the sound release hole of the buzzer; otherwise the sound pressure
may vary and result in unstable buzzer operation. Make sure that
the buzzer is not affected by a standing wave or the like.
• Be sure to solder the buzzer terminal at 350℃ max.(80W max.)(soldering iron trip) within 5 seconds using a
solder containing silver.
• Avoid using the buzzer for a long time where any corrosive gas
(H2S, etc.) exists; otherwise the parts or sound generator may
corroded and result in improper operation.
• Be careful not to drop the buzzer.
Dimension: (mm)
Tolerance: ±0.5
Continuous tone
Frequency response:
