1﹒Electrical Characteristics
Oscillation Frequency (Hz)
Operating Voltage (VO-p)
Rated Voltage (VO-p)
Current Consumption (mA/max.)
Sound Pressure Level (dB/min.)
Coil Resistance
(Ω)
Operating Temperature (
℃
)
Storage Temperature (
℃
)
PS：Vp-p＝1/2duty , square wave
VER .:0
2731
2.5~4.5
3.6
100 at Rated Voltage
85at 10cm at Rated Voltage
16± 3
-30 ~ +70
-40 ~ +85
2﹒Typical Frequency Response Curve
3﹒Dimensions and Material
3-1 Shape
Unit : mm
3-2 Material
Housing
Leading Pin
Weight (Gram)
LCP plastic resin (Color : Black)
Tin Plated Brass
0.8
Tol:±0.3
4﹒Recommend Driving Circuit
The base current Ib should high enough so that it saturates the collector current of the
transistor with the CB load.
5. TESTING METHOD
．
Standard Measurement conditions
Temperature:25
±
2
℃
Humidity:45-60%
．
Acoustic Characteristics
The oscillation frequency, current consumption and sound pressure are measured by the
measuring instruments shown below.
10cm
FUNCTION
GENERATOR
AMPERE
METER
SOUNDER
MICROPHONE
dB
METER
In the measuring test, buzzers is placed as follows:
MICROPHONE
SAMPLE
1OCM
6.
RELIABILITY
ITEMS
Coldness
withstanding
Hotness
withstanding
Humidity
withstanding
METHOD OF TEST AND MEASUREMENTS
After 98 hours of being exposed to -30
℃
environment, should be returned to normal
environment for 2 hours, then re-proceed to test.
After 98 hours of being exposed to +80
℃
environment, should be returned to normal
environment for 2 hours, then re-proceed to test.
After 98 hours of being exposed to 40
℃
95%RH
environment in actual operation, should be
returned to normal environment for 2 hours, then
re-proceed to test.
Testing after 1,000 hours actual continuous
operation. (at standard measurement conditions)
A natural drop from 75cm high down to the
ground.
Vibration of 2,000 cycles per minute, 2mm
amplitude, applied in X, Y and Z directions for 30
minutes each.
PERFORMANCE
No abnormality
shall exist
No abnormality
shall exist
No abnormality
shall exist
Durability
Drop
withstanding
Vibration
withstanding
No abnormality
shall exist
No abnormality
shall exist
No abnormality
shall exist
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