- Part number : BM5025SW-0340-12
Micro 3V SMD Buzzer , smallest SMD Electromagnetic Transducer For wristwatch
Quick Detail:
- Size: L5.0mm*W5.0mm*H2.0mm
- SPL: Min.75dB at 10cm Input 4KHz/3.0Vo-p 1/2 Duty Square Wave
- Coil Resistance: 12+/-3 ohm
- Operating Voltage: 2.5-4.5Vo-p
- Rated Current: Max.100mA Input 4KHz/3.0Vo-p 1/2 Duty Square Wave
Specification:
1. Technical Parameter
Measuring condition
Part shall be measured under a condition (Temperature: 5～35℃, Humidity: 45%～85%R.H., Atmospheric pressure: 860 ～1060hPa) unless the standard condition (Temperature: 25±3℃, Humidity: 60±10%R.H. Atmospheric pressure: 860 ～1060hPa) is regulated to measure.
| 1 | Rated Voltage | 3.0 Vo-p |
| 2 | Operating Voltage | 2.5～4.5 Vo-p |
| 3 | Rated Current | Max.100mA ,at 4000Hz 50% duty Square Wave 3.0Vo-p |
| 4 | Sound Output at 10cm | Min. 75dB,at 4000Hz 50% duty Square Wave 3.0Vo-p |
| 5 | Coil Resistance | 12±3Ω |
| 6 | Resonant Frequency | 4000Hz |
| 7 | Operating Temperature | -20℃～+70℃ |
| 8 | Store Temperature | -40℃～+85℃ |
| 9 | Net Weight | Approx 0.1g |
| 10 | RoHS | Yes |
*Unit: mm; Tolerance: ±0.3mm Except Specified
*Housing Material: Black LCP
*Terminal plate: 3 soldering pads, tin Plating Brass
3.Electrical And Acoustical Measuring Condition
Recommended Driving Circuit
Recommended Setting
Frequency Response
3.0Vo-p 50% duty Square wave,10cm
Surface mounting condition
Reflow soldering
Recommendable reflow soldering condition is as follows.
Note: (1) In automated mounting of the SMD sound transducers on PCB, any bending, expanding
and pulling forces or shocks against the SMD sound transducers shall be kept minimum
to prevent them from electrical failures and mechanical damages of the devices.
(2) In the reflow soldering, too high soldering temperatures and too large temperature
Gradient such as rapid heating or cooling may cause electrical failures and mechanical
damages of the devices.
Soldering pattern
Reliability Test
After any following tests the part shall meet specifications without any degradation in
appearance and performance except SPL. SPL shall not deviate more than -10 dB
from the initial value
Ordinary Temperature Life Test
The part shall be subjected to 96 hours at 25±10℃. Input rated voltage
Resonant frequency, 1/2 duty Square wave.
High Temperature Test
The part shall be capable of with standing a storage temperature of +85℃ for 96 hours.
Low Temperature Test
The part shall be capable of with standing a storage temperature of -40℃ for 96 hours.
Humidity Test
Temperature:+40℃±3℃ Relative Humidity:90%～95% Duration: 48 hours
and expose to room temperature for 6 hours
Temperature Shock Test
Temperature:60℃ /1hour→ 25℃/3hours→-20℃/1hour→ 25℃/3hours (1cycle)
Total cycle: 10 cycles
Drop Test
Standard Packaging From 75cm(Drop on hard wood or board of 5cm thick,
three sides, six plain.)
Vibration Test
Vibration:1000cycles /min. Amplitude:1.5mm, Duration: 1 hour in each 3 axes
Reflow Test
Use recommendable reflow soldering condition (as shown in 5.1)
(1) No abnormality should be found after reflow
(2) Good soldering to meet soldering requirements
Note:
As this product is not protected from foreign material entering, please make sure that any foreign materials (e.g. magnetic powder, washing solvent, flux, corrosive gas) do not enter this product in your production processes. The functional degradation (e.g. SPL down) may occur if foreign material enter it.
