Surge Arrester 2-Electrode-Arrester A81-A250X Ordering code: B88069X1500xxxx a) DC spark-over voltage 1) 250 ± 20 V % < 550 < 500 V V < 700 < 650 V V Nominal impulse discharge current (wave 8/20 µs) Single impulse discharge current (wave 8/20 µs) 20 25 kA kA Nominal alternating discharge current (50 Hz, 1 s) Alternating discharge current (50 Hz, 9 cycles) 10 100 A A Insulation resistance at 100 Vdc > 10 GΩ Capacitance at 1 MHz < 1.5 pF Arc voltage at 1 A Glow to arc transition current Glow voltage ~ 15 ~ 0.5 ~ 60 V A V Weight ~ 1.5 g Operation and storage temperature -40 ... +90 °C Climatic category (IEC 60068-1) 40/ 90/ 21 Impulse spark-over voltage at 100 V/µs - for 99 % of measured values - typical values of distribution at 1 kV/µs - for 99 % of measured values - typical values of distribution Marking, blue 250 YY O 250 YY O a) - Nominal voltage - Year of production - Non radioactive xxxx = S102 (100 pcs on 5 taped stripes) = T502 (500 pcs on tape and reel) 1) At delivery AQL 0.65 level II, DIN ISO 2859 Terms in accordance with ITU-T Rec. K.12 and DIN 57845/VDE0845 AB E / AB PM Issue 01, 27.10.2003 Page 1 of 2 Surge Arrester 2-Electrode-Arrester A81-A250X Ordering code: B88069X1500xxxx a) Not to scale Dimensions in mm Non controlled document EPCOS AG 2002. Reproduction, publication and dissemination of this data sheet, enclosures hereto and the information contained therein without EPCOS' prior express consent is prohibited. Purchase orders are subject to the General Conditions for the Supply of Products and Services of the Electrical and Electronics Industry recommended by the ZVEI (German Electrical and Electronic Manufacturers' Association), unless otherwise agreed. AB E / AB PM Issue 01, 27.10.2003 Page 2 of 2