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| www.vishay.com 1 307C1258bglab, 307C1258bgmab vishay cera-mite ceramite.support@vishay.com document number: 23028 revision 19-apr-01 ptc thermistors application - starting in electronic fluorescent ballasts parameter unit resistance ? 85 25% maximum voltage v rms 280 maximum continuous voltage v rms 60 withstand voltage v rms 560 switching temperature c 120 standard electrical specifications @ 25 c general application diagram lamp ignition time can be optimized to increase life of discharge tube operating time to 50% current parameter wire copper clad steel coating none packaging bulk pack mechanical specifications dimensions in millimeters ptc c discharge tube diameter a 10.0 max. thickness b 4.5 max. height c 14.5 max. lead length d 307C1258bglab 34 min. 307C1258bgmab 4.75 0.6 lead spacing e 5.0 0.8 lead diameter 0.64 0.5 0.75 1 1.25 1.5 current (a) 10.0 1.0 0.1 operating time (sec) a c d e b
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