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產(chǎn)品中心 > BM1238-0320-16
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BM1238-0320-16

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

3Vo-p

2

Operating Voltage

1-3Vo-p

3

Rated Current

Max.90mA ,at 2000Hz 50% duty Square Wave 3.0Vo-p

4

Sound Output at 10cm

Min. 85dB,at 2000Hz 50% duty Square Wave 3.0Vo-p

5

Coil Resistance

16±5Ω

6

Resonant Frequency

2048Hz

7

Operating Temperature

-20℃～+70℃

8

Store Temperature

-30℃～+80℃

9

Net Weight

Approx 2g

10

RoHS

Yes

2. Dimensions

Unit: mm

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*Unit: mm; Tolerance: ±0.5mm Except Specified

*Housing Material: Black PBT

 

 

3. Electrical And Acoustical Measuring Condition

Recommended Driving Circuit

2(4).png 

Resonant frequency, 1/2 duty cycle. Square wave.

Signal amplitude should be large enough tosaturate

the transistor.

Recommended Setting

3(4).png

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4. 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 +80℃ 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:70℃ /1hour→ 25℃/3hours→-30℃/1hour→ 25℃/3hours (1cycle)

Total cycle: 10 cycles

 Drop Test

Standard Packaging From 75mm(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

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.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5. PACKING

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