MODEL: ST-0503

PRODUCT: Electromagnetic Buzzer

EDITION: A/2017

RELIABILITY TEST

item

test conditions

evaluation standard

operating life test

ORDINARY TEMPERATURE

The part will be subjected to 96 hours of

continuous operation at +25±10oC

After the test the part will meet specifications

without any degradation in appearance and

performance except SPL, after 4 hours at +25oC.

The SPL would be in ±10dBA compared with

initial one.

HIGH TEMPERATURE

The part will be subjected to 72 hours of

continuous operation at +70oC with 3.0V,

4000Hz applied.

LOW TEMPERATURE

The part will be subjected to 72 hours of

continuous operation at -30oC with 3.0V, 4000Hz

applied.

TEST CONDITION

Standard Test Condition : a)Temperature: +5~+35oC b)Humidity:45~85% c)Pressure: 860~1060mbar

MECHANICAL CHARACTERISTICS

item

test condition

evaluation standard

solderability

Lead terminals are immersed in solder bath of

+250±5oC for 3±1 seconds.

90% min. lead terminals will be wet with solder

No interference in operation.

soldering heat resistance

The product followed the reflow profile to test

its reflow thermo-stability.

terminal mechanical

strength

Lead pads will be soldered on the pc board, and

the force 9.8N(1.0Kg) will be applied behind the

part for 10 seconds.

No damage and cutting off

vibration

The part will be subjected to a vibration cycle of

10Hz to 55Hz to 10Hz in a period of 1 minute.

Total peak amplitude will be 1.52mm(9.3G). The

vibration test will consist of 2 hours per axis in

each three axes (X,Y,Z). Total 6 hours.

After the test the part will meet specifications

without any damage in appearance and per-

formance except SPL. SPL would be in ±10dBA

compared with initial one.

drop test

The part only will be dropped from a height of

75cm onto a 40mm thick wooden board 3 times

in 3 axes (X,Y,Z). Total of 9 times.

RECOMMENDED TEMPERATURE PROFILE FOR REFLOW OVEN

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Recommendable wave soldering condition is as follows:

Note 1: It is requested that reflow soldering should be executed

after heat of product goes down to normal temperature.

Note 2: Peak reflow temperature of 250˚C maximum of 10 seconds,

with a maximum duration of 40-60 seconds between 220˚C and

250˚C