MLT-4020H-SMD電磁無源蜂鳴器-江蘇華能電子有限公司

MLT-4020H - SMD電磁無源蜂鳴器

Specification for Electro-Magnetic Buzzer (SMD Type)				Page 2 of 6
			Des.	Chk.
Model No.:	MLT-4020H	Part No.

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		3.0Vo-p
2	Operating Voltage		2.0～5.0Vo-p
3	Rated Current		Max.100mA at 4000Hz 50% duty Square Ware 3.0Vo-P
4	Sound Output at 10cm		Min. 75Db,at 4000Hz 50% duty Square Ware 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
Dimensions		Unit: mm

Unit: mm; Tolerance: ±0.3mm Except Specified Housing Material: Black LCP *Terminal plate: 3 soldering pads, tin Plating Brass

Electrical And Acoustical Measuring Condition
Recommended Driving Circuit Resonant frequency, 1/2 duty cycle. Square wave. Signal amplitude should be large enough tosaturate the transistor.	Recommended Setting

Frequency Response

3.6Vo-p 50% duty Square wave,10cm

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.

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.
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.

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.

Packing