规格书
Specification
江苏华½电子有限公司
JIANGSU HUANENG ELECTRONICS CO., LTD.
CUSTOMER:
MODEL NO.: MLT-7525
OUR PART NO..:
CUSTOMER PART NO.:
CUSTOMER
APPROVED
CHECKED
Add: Chenbao Industrial Park, Chenbao Town, Xinghua,Taizhou City, Jiangsu China.
江苏省兴化市陈堡镇工业园区
Tel:+86-523-83710666
Fax:+86-523-83724866
Email: hn@huawha.com; http://www.huawha.com
江苏华½电子有限公司
JIANG SU HUANENG ELECTRONICS CO.,LTD
Chenbao Industrial Park, Chenbao Town, Xinghua,Taizhou
City,China.
Jiangsu China.
Tel:+86-523-83710666
Fax:+86-523-83724866
Email: hn@huawha.com; http://www.huawha.com
Specification for Electro-Magnetic Buzzer
(SMD Type)
Model No.:
Des.
5/22/2017
Page 2 of 6
Chk.
5/22/2017
MLT-7525
Part No.
1. Technical Parameter
Measuring condition
Part shall be measured under a condition (Temperature: 5
½
35℃, Humidity: 45%
½
85%R.H.,
Atmospheric pressure: 860
½
1060hPa) unless the standard condition (Temperature: 25±3℃,
Humidity: 60±10%R.H. Atmospheric pressure: 860
½1060hPa)
is regulated to measure.
Rated Voltage
Operating Voltage
Rated Current
Sound Output at 10cm
Coil Resistance
Resonant Frequency
Operating Temperature
Store Temperature
Net Weight
RoHS
Unit: mm
1
2
3
4
5
6
7
8
9
10
3.6 Vo-p
2.5½4.5Vo-p
Max.95mA ,at 2700Hz 50% duty Square Wave 5Vo-p
Min. 80dB,at 2700Hz 50% duty Square Wave 5Vo-p
16±3Ω
2700Hz
-20℃½+70℃
-40℃½+85℃
Approx 1g
Yes
2. Dimensions
*Unit: mm; Tolerance:
±0.3mm
Except Specified
*Housing Material: Black LCP
*Terminal plate: 3 soldering pads, tin Plating Brass
江苏华½电子有限公司
JIANG SU HUANENG ELECTRONICS CO.,LTD
Chenbao Industrial Park, Chenbao Town, Xinghua,Taizhou
City,China.
Jiangsu China.
Tel:+86-523-83710666
Fax:+86-523-83724866
Email: hn@huawha.com; http://www.huawha.com
Specification for Electro-Magnetic Buzzer
(SMD Type)
Model No.:
Des.
5/22/2017
Page 3 of 6
Chk.
5/22/2017
MLT-7525
Part No.
3. Electrical And Acoustical Measuring Condition
Recommended Driving Circuit
Recommended Setting
SM-1641
FUNC TION GENERATOR
信号发生仪
Resonant frequency, 1/2 duty cycle. Square wave.
Signal amplitude should be large enough tosaturate
the transistor.
Amplifier
放大器
Mic.
Buzzer
10cm
dB
SPL
Power
电源
40cm
测试示意图
4. Frequency Response
3.6Vo-p 50% duty Square wave,10cm
江苏华½电子有限公司
JIANG SU HUANENG ELECTRONICS CO.,LTD
Chenbao Industrial Park, Chenbao Town, Xinghua,Taizhou
City,China.
Jiangsu China.
Tel:+86-523-83710666
Fax:+86-523-83724866
Email: hn@huawha.com; http://www.huawha.com
Specification for Electro-Magnetic Buzzer
(SMD Type)
Model No.:
Des.
5/22/2017
Page 4 of 6
Chk.
5/22/2017
MLT-7525
Part No.
5. Surface mounting condition
5.1 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.
5.2 Soldering pattern
江苏华½电子有限公司
JIANG SU HUANENG ELECTRONICS CO.,LTD
Chenbao Industrial Park, Chenbao Town, Xinghua,Taizhou
City,China.
Jiangsu China.
Tel:+86-523-83710666
Fax:+86-523-83724866
Email: hn@huawha.com; http://www.huawha.com
Specification for Electro-Magnetic Buzzer
(SMD Type)
Model No.:
Des.
5/22/2017
Page 5 of 6
Chk.
5/22/2017
MLT-7525
Part No.
6. 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
6.1 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.
6.2 High Temperature Test
The part shall be capable of with standing a storage temperature of +80
℃
for 96
hours.
6.3 Low Temperature Test
The part shall be capable of with standing a storage temperature of -30
℃
for 96
hours.
6.4 Humidity Test
Temperature:+40℃±3℃ Relative Humidity:90%½95% Duration: 48 hours
and expose to room temperature for 6 hours
6.5 Temperature Shock Test
Temperature:60℃ /1hour→ 25℃/3hours→-20℃/1hour→ 25℃/3hours (1cycle)
Total cycle: 10 cycles
6.6 Drop Test
Standard Packaging From 75cm(Drop on hard wood or board of 5cm thick,
three sides, six plain.)
6.7 Vibration Test
Vibration:1000cycles /min. Amplitude:1.5mm, Duration: 1 hour in each 3 axes
6.8 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.
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