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      HN ELECTRONIC

      專業從事電磁式蜂鳴器、壓電式蜂鳴器生產及研發

      MLT-4020H

      MLT-4020H

      MLT-4020H

      MLT-4020H

      MLT-4020H

      產品說明

      Specification for Electro-Magnetic Buzzer
           (SMD Type)

       

      Page 2 of 6

      Des.

      Chk.

      Model No.:

      MLT-4020H

      Part No.

       

       

       

        
      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

      3.0Vo-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

      1. Dimensions

      Unit: mm

       

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

      1. 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
            

      1. Frequency Response

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

      1. 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.

      1. 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

        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.

        1. Humidity Test

      Temperature:+40℃±3℃   Relative Humidity:90%~95% Duration: 48 hours
             and expose to room temperature for 6 hours

        1. Temperature Shock Test

      Temperature:60℃ /1hour→ 25℃/3hours→-20℃/1hour→ 25℃/3hours (1cycle)
             Total cycle: 10 cycles

        1. Drop Test

      Standard Packaging From 75cm(Drop on hard wood or board of 5cm thick,
             three sides, six plain.)

        1. Vibration Test

      Vibration:1000cycles /min. Amplitude:1.5mm, Duration: 1 hour in each 3 axes

        1. 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.

      1. Packing

       

       


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