AC type 2048Hz Φ12*5.4mm electronic magnetic buzzer for door bell
Description:
Buzzer is a signaling device that is not a loudspeaker. It can be
mechanical, electromechanical, or electronic (a piezo transducer).
When a lower frequency is required, an electromagnetic buzzer can
fill the need. These are very common in automotive chimes and
higher end clinical diagnostic devices. The electromagnetic buzzer
generally consists of a plastic housing with a metal diaphragm that
is flexed by an electro- magnet. The main benefit of this design is
the ability to obtain low frequencies in a small package. Drawbacks
include mechanical wear, electrical noise, lower sound output, and
large power consumption.
Application:
It is widely used in computers, printers, photocopiers, alarms,
electronic toys, automotive electronic devices, telephones, timers
and other electronic products for voice devices.
Specifications:
| Type | Unit | 12054W01 | 12054W03 | 12054W05 |
| 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 | ≥80 | ≥80 | ≥80 |
| Resonant frequency | Hz | 2048 |
| Operating temperature | ℃ | -20~+70 |
| Storage temperature | ℃ | -30~+80 |
| Weight | g | 2 |
Difference between active and passive:
An active buzzer has a built-in oscillating source, so it will make
sounds when electrified. An active buzzer can be connected just
like an LED, but as they are a little more robust, you won’t be
needing a resistor to protect them.
A passive buzzer does not have such 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. The active buzzer is
often more expensive than the passive one because of multiple
built-in oscillating circuits.
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 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 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.
• 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
Frequency response:
