SPECIFICATION FOR APPROVAL Customer： Description： Magnetic Transducer Sob erton Part No. ： ST-025BLA Date：2008-12-18 Customer Model No. ： Date of Approval Authorization Signature 211 N. First Street Minneapolis, MN. 55401 612-849-6205 [email protected] Approved Checked Design Ryan Wang Wei Rong Xu Hong Wei 2008/12/18 2008/12/18 2008/12/18 A:SCOPE This specification applies magnetic buzzer, ST-025BLA 2/7 B:SPECIFICATION ■ Test condition: TEMP=+25±2 ℃ Related humidity=45~60±5% Air pressure:860-1060mbar NO. Item Unit Specification Condition Rated Voltage Vo-p 1 Vo-p 3.6 2 3 4 5 6 7 8 9 10 11 12 13 14 Operating Voltage Mean Current Coil Resistance Sound Output Rated Frequency Operating Temp Storage Temp Dimension Weight Vo-p mA Max. 100 Ω 16 ± 3 dBA 80/10cm Hz 2500 ℃ -30-+85 ℃ -40-+85 mm 7.5 × 7.5 × 2.5 gram 0.8 Material 0V Applying rated voltage & rated frequency, square wave 1/2 duty Distance at 10cm(A-weight free air), Applying rated voltage & rated frequency, square wave,1/2duty See attached drawing. LCP (Black) SMD type ( Plating Sn ) Terminal Environmental Protection Regulation Storage life 2.5 - 4.5 See attached drawing RoHS month 3 3 months preservation at room temp(25±3℃), Humidity40% 3/7 C:ENVIRONMENT TEST No. 1 2 Item Test condition Evaluation standard High temp. test After being placed in a chamber at +85℃ for 96 hours. Low temp. test After being placed in a chamber at -30℃ for 96 hours. The part shall be subjected to 10 cycles. One cycle shall consist of; 3 Thermal shock +85℃ +20℃ +20℃ -30℃ 30 min 15 min 15 min 30 min The part shall be subjected to 10 cycle and consist of; +70℃ 4 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. a, b: 90~98%RH Temp. / Humidity Cycle c: 80~98%RH +25℃ a b 3hrs 12±0.5hrs 3hrs c 24hrs D: RELIABILITY TEST No. Item Test condition □ Applying rated voltage, rated frequency, square wave , 1/2 duty cycle： 1 Operating life test Ordinary temperature The part shall be subjected to 96 hours at room temperature. TEST CONDITION. Standard Test Condition : a)Temperature: +5~+35℃ b)Humidity:45~85% Judgment Test Condition :a)Temperature:+25±2℃ b)Humidity:60~70% Evaluation standard 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. c)Pressure: 860~1060mbar c)Pressure: 860~1060mbar E:MECHANICAL CHARACTERISTICS No Item Test condition Lead terminal are immersed in rosin for 5 seconds and then Solderability immersed in Solder bath of +260±5℃ for 3±0.5 second 1 2 Soldering Heat Lead terminal are immersed in soldering bath of +260±5℃ Resistance for3±0.5 Second. 3 Iron Soldering Heat Resistance 4 Terminal Mechanical Strength 5 6 Vibration Drop test Lead terminal are soldering of +350±5℃, 2.5±0.5 Second. Apply the terminal with 9.8N(1kg) strength for 10±1 sec. 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 vibration test shall consist of 2 hours per axis in each three axes(X,Y,Z),Total 6 hours. The part only shall be dropped from a height of 75cm onto a wooden board 1 times. Temp.(° C) * Reflow profile of lead-free Max. 10 sec. Max. 250° C 220° C 200° C 150° C 100° C 50° C 60 ~ 120 sec. 40 ~ 60 sec. Time(sec) 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 250°C Max.10 sec., with a maximum duration of 40~60 sec. between 220°C and 250° C 4/7 Evaluation standard 90% min. lead terminals shall be wet with solder No interference in operation No damage and cutting off 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. 5/7 F: MEASUREMENT METHOD +Vcc BZ Vo-p Magnetic Transducer 180 VCE OV G: INSPECTION FIXTURE Magnetic Transducer 40cm 10cm Sound Level Meter TES1350A