MODEL: ST-025BH

PRODUCT: Electromagnetic Buzzer

EDITION: A/2017

PAGE 1/5

THIS SPECIFICATION APPLIES TO THE ELECTROMAGNETIC BUZZER

SPECIFICATION

TEST CONDITION: TEMP= +25 ±2oC RELATED HUMIDITY= 65 ±5% AIR PRESSURE: 860 ~ 1060MBAR

item

unit

specification

condition

rated voltage

Vo-p

3.6

operating volt

Vo-p

2.5 ~ 4.5

mean current

mA

Max.100

At rated voltage, square wave, 1/2 duty

coil resistance

Ω

16 ±3

sound output

dBA

85

At 10cm (A-weight free air), at rated voltage

2700Hz, square wave, 1/2duty

rated frequency

Hz

2700

operating temp

oC

-30 ~ +85

storage temp

oC

-40 ~ +85

dimension

mm

7.5×7.5×H2.5

See attached drawing

weight

gram

0.8

material

LCP(Black)

terminal

SMD Type (Plating Sn)

See attached drawing

environmental

protection regulation

RoHS

ENVIRONMENT TEST

item

test condition

evaluation standard

high temp. test

After being placed in a chamber at +85oC for 96

hours.

After the test the part will meet specifications

without any degradation in appearance and per-

formance except SPL. After 4 hours at +25oC.

The SPL will be in ±10dBA compared with initial

one.

low temp. test

After being placed in a chamber at -30oC for 96

hours.

thermal shock

The part will be subjected to 10 cycles.

One cycle shall consist of:

temp./humidity cycle

The part will be subjected to 10 cycles.

One cycle shall be 24 hours and consist of:

Vo-p

0V

a,b: 90~98%RH

c: 80~98%RH

+85oC

+25oC

3hrs

3hrs

12±0.5hrs

24 hrs

a

b

c

60 min

30 min

-30oC

+85oC

30 min