surge arrester T90-A420XSMD 3-electrode-arrester ordering code: b88069x2670t902 kb ab e / kb ab pm issue 04, 20.07.2004 page 1 of 2 dc spark-over voltage 1) 2) 4) dc spark-over voltage 2) 5) 357 ? 525 357 ? 1200 v v impulse spark-over voltage at 100 v/s - for 99 % of measured values 4) - typical values of distribution 4) at 1 kv/s - for 99 % of measured values 4) - typical values of distribution 4) at 1 kv/s - for 99 % of measured values 5) - typical values of distribution 5) < 1000 < 800 < 1200 < 1000 < 2200 < 1800 v v v v v v nominal impulse discharge current (wave 8/20 s) 6) single impulse discharge current (wave 10/350 s) 6) 5 1 ka ka nominal alternating discharge current (50 hz, 1 s) 6) 5 a impulse life 300 operations 10/1000 s 5) 200 a insulation resistance at 100 v dc 4) > 1 g ? capacitance at 1 mhz 4) < 1.5 pf transverse delay time 3) < 0.2 s arc voltage at 1 a glow to arc transition current glow voltage ~ 10 ~ 1 ~ 60 v a v weight ~ 0.8 g operation and storage temperature -40 ... +90 c climatic category (iec 60068-1) 40/ 90/ 21 marking, blue 420 yy o 420 - nominal voltage yy - year of production o - non radioactive 1) at delivery aql 0.65 level ii, din iso 2859 2) in ionized mode 3) test according to itu-t rec. k.12 4) tip or ring electrode to center electrode 5) tip to ring electrode 6) total current through center el ectrode, half value through tip respectively ring electrode terms in accordance with itu-t rec. k.12 and din 57845/vde0845
surge arrester T90-A420XSMD 3-electrode-arrester ordering code: b88069x2670t902 ? epcos ag 2002. reproduction, publicati on and dissemination of this data sheet, enclosures hereto and the information contained therein without epcos' pr ior express consent is prohibited. purchase orders are subject to the general conditions for t he supply of products and services of the electrical and electronics industry recommended by the zvei (german el ectrical and electronic manufacturers' association), unless otherwise agreed. kb ab e / kb ab pm issue 04, 20.07.2004 page 2 of 2 not to scale dimensions in mm non controlled document smd-gurtverpackung nach iec 60286-3 / tape and reel packing comply with the specification of iec 60286-3
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