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          HN ELECTRONIC

          专业从事电磁式蜂鸣器、压电式蜂鸣器生产及研发

          MLT-4020H

          MLT-4020H

          MLT-4020H

          MLT-4020H

          MLT-4020H

          产品说明

          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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