spec ification for approval customer description magnetic transducer date 2008-12-18 customer model no. date of approval ST-025BLA sob erton part no. authorization signature approved checked design ryan 2008/12/18 wang wei rong 2008/12/18 xu hong wei 2008/12/18
vo - p 0v a:scope 2/7 b:specification test condition: temp=+252 related humidity=45~605% air pressure:860-1060mbar no. item unit specification condition this specification applies magnetic buzzer, ST-025BLA 1 rated voltage vo-p 3.6 2 operating voltage vo-p 2.5 - 4.5 3 mean current ma max. 100 applying rated voltage & rated frequency, square wave 1/2 duty 4 coil resistance ? 16 3 5 sound output dba 80/10cm distance at 10cm(a-wei ght free air), applying rated voltage & rated frequency, square wave,1/2duty 6 rated frequency hz 2500 7 operating temp -30-+85 8 storage temp -40-+85 9 dimension mm 7.5 7.5 2.5 see attached drawing. 10 weight gram 0.8 11 material lcp (black) 12 terminal smd type see attached drawing ( plating sn ) 13 environmental protection regulation rohs 14 storage life month 3 3 months preservation at room temp(253 ), humidity40%
c:environment test 3/7 no. item test condition evaluation standard 1 high temp. test after being placed in a chamber at +85 for 96 hours. 2 low temp. test after being placed in a chamber at -30 for 96 hours. 3 thermal shock the part shall be subjected to 10 cycles. one cycle shall consist of; 4 temp. / humidity cycle the part shall be subjected to 10 cycle and consist of; after the test the part shall meet specifications without any degradation in appearance and performance except spl. after 4 hours at +25 , the spl shall be in 10 dba compared with initial one. d: reliability test no. item test condition evaluation standard 1 operating life test applying rated voltage, rate d frequency, square wave , 1/2 duty cycle ordinary temperature the part shall be subjec ted to 96 hours at room temperature. after the test the part shall meet specifications without any degradation in appearance and performance except spl. after 4 hours at +25 ,the spl shall be in 10 dba compared with initial one. test condition. standard test condition : a)temperature: +5~+35 b)humidity:45~85% c) pressure: 860~1060mbar judgment test condition :a)temperature:+252 b)humidity:60~70% c)pressure: 860~1060mbar +70 +25 a b c 24hrs 3hrs 3hrs 12 0.5hrs a, b: 90~98%rh c: 80~98%rh -30 +20 30 min 15 min 30 min +20 15 min +85
e:mechanical characteristics 4/7 no item test condition evaluation standard 1 solderability lead terminal are immersed in rosin for 5 seconds and then immersed in solder bath of +2605 for 30.5 second 2 soldering heat resistance lead terminal are immersed in soldering bath of +2605 for30.5 second. 3 iron soldering heat resistance lead terminal are soldering of +3505 , 2.50.5 second. 90% min. lead terminals shall be wet with solder no interference in operation 4 terminal mechanical strength apply the terminal with 9.8n(1kg) strength for 101 sec. no damage and cutting off 5 vibration the part shall be subjected to a vibration cycle of 10hz to 55hz to 10hz in a period of 1 minute. total peak amplitude shall be 1.52mm(9.3g).the vibrati on test shall consist of 2 hours per axis in each thr ee axes(x,y,z),total 6 hours. 6 drop test the part only shall be dropped from a height of 75cm onto a wooden board 1 times. after the test the part shall meet specifications without any damage in appearance and performance except spl. the spl shall be in 10 dba compared with initial one. 100 c max. 250 c 220 c 200 c 150 c max. 10 sec. 40 ~ 60 sec. 60 ~ 120 sec. time(sec) 50 c temp.( c) * reflow profile of lead-free recommendable reflow 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 250c max.10 sec., with a maximum duration of 40~60 sec. between 220c and 250 c
5/7 bz magnetic transducer sound level meter tes1350a magnetic transducer 40cm 10cm vo-p ov g: f: +vcc inspection fixture measurement method
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