spsemi ... www .spsemi.cn page 1 of 3 gas discharge tube features electronic stability small volume, easy to placement machine operation large flow capacity, impact resistant ability static electricity capacity, good insulation reaction speed is 50 ns - 150 ns applications adsl modem fax telephone rs485 rs232 can level of protection catv power supply prevents thunder common-mode protection gdt/gsm***c series gsm***c series electrical characteristics storage and operating temperature -40~125 c rev 2018 02 29 line cards dc spark-over voltage (@100v/s (v) part number impulse spark-over voltage (@1kv/s) (v) discharge current 10hits (@8/20s) (ka) ac discharge current (@50hz) (a) max. capacitance (@1mhz) (pf) min.insulation resistance (@dc) (g) test voltage (v) GSM075C gsm090c gsm150c gsm300c gsm470c gsm600c 75 30 % 90 30 % 150 20 % 300 20 % 470 20 % 600 20 % 600 600 600 850 1100 1200 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 50 50 100 100 100 100 1 1 1 1 1 1
spsemi ... www.spsemi.cn page 2 of 3 initial characteristics test item dc-spark-over voltage vs insulation resistance capacitance c(pf) add and measure the dc voltage gradually maxto get the discharge threshold voltage. the measuring current is 1ma/1 second max. 1sec .(1ma) test method specification it depands on each spec. 1g min. 1.0pf max. surge characteristics test item surge withstand capability surge life test in the glass tube ends in 8/20 us surge tester, applying the model that corresponds to the impact resistance current, time interval for the 60 s of plus or minus the test 5 times. test the dc voltage, insulation resistance, static capacitance and check the appearance. apply 10kv voltage charged in 1500pf condenser and apply the current to the specimen,200 times at 10 seconds of intervals. test method specification dc spark-over voltage jse: vs/vs 30% Q dimensions dimensions in millimeters 4.5 0 3 . 2.7 0 2 . 3.2 0 2 . 0.5 4.5 0 3 . 0.5 3.2 0 2 . rev 2018 02 29 gdt/gsm***c series
spsemi ... www.spsemi.cn page 3 of 3 enviromental characteristics test item test method specification cold resistance after -403 (1000hrs) / room temp.,normal humidity(4 hrs) cycle, measure the properties. within standard mentioned in initial characteristics. within standard mentioned in initial characteristics. within standard mentioned in initial characteristics. within standard mentioned in initial characteristics. after 1252 (1000hrs) / room temp.,normal humidity(4 hrs) cycle, measure the properties. after 852 rh85%(1000hrs) / room temp.,normal humidity(4 hrs) cycle, measure the properties. 25 times repetition of cycle -403 (30 min.),roon temp., (4 min.), 1252 (30min.), room temp., normal humidity(4hrs) . heat resistance temperature resistance temperature period tensile strength bending strength resistance to soldering attachment by solder dip resistance to soldering heat by solder dip apply 2.5kgs load approximately 30 seconds, then check for pull-out and breaking of the lead wire. within standard mentioned in initial characteristics. within standard mentioned in initial characteristics. bend the lead wire, with jig which radius is 0.75~0.8mm, at the point of 2mm from the body, under 0.25 kgs load applied at the right angle the direction of theamis and get the bent lead wire back to its original poing after the procedure was repeated 2times. apply flux and immerse in molten solder, up to the point of 3mm from the body,for 5 sec. (235 5 ). wash the leadwire and check for soldering adhesion. lead wire is evenly covered by solder over 90%. apply flux and immerse in molten solder, up to the point of 3mm from the body,for 5 sec. (235 5 ). wash the leadwire and check forsoldering adhesion.) within standard mentioned in initial characteristics. recommended wave slodering profile rev 2018 02 29 gdt/gsm***c series
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