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Specification for Electro-Magnetic Buzzer
     (SMD Type)

Page 4 of 6

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. Electrical And Acoustical Measuring Condition

1. Frequency Response

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.