Surge arrester 3-electrode arrester Series/Type: Ordering code: T20-A420X B88069X7820C203 Version/Date: Version: Issue 02 / 2007-04-23 01 Content of header bars 1 and 2 of data sheet will be automatically entered in headers and footers! Please fill in the table and then change the color to "white" (or invisible). This ensures that the table disappears for the customer PDF. To update the data sheet, click on the symbol "Preview" and then "Close". Please do not alter the header or footer when copying the content. Identification/Classification 1: (header 1 + top left header bar) Surge arrester Identification/Classification 2: (header 2 + bottom left header bar) 3-electrode arrester Ordering code: (top right header bar) B88069X7820C203 Series/Type: (top right header bar) T20-A420X Preliminary data (optional): (if necessary) Department: KB AB E / KB AB PM Date: Issue 02 / 2007-04-23 © EPCOS AG 2007. Reproduction, publication and dissemination of this document, enclosures hereto and the information contained therein without EPCOS' prior express consent is prohibited. Surge arrester 3-electrode arrester B88069X7820C203 T20-A420X Features Applications Standard size Fast response time Very high current rating Stable performance over life Very low capacitance High insulation resistance RoHS-compatible Line protection Station protection Base stations Electrical specifications DC spark-over voltage 1) 2) 4) 350 ... 550 V Impulse spark-over voltage 4) at 100 V/µs - for 99 % of measured values - typical values of distribution < 750 < 700 V V < 850 < 800 V V 10 50 20 25 5 A A kA kA kA Insulation resistance at 100 Vdc 4) > 10 GΩ Capacitance at 1 MHz 4) < 1.5 pF Transverse delay time 3) < 0.2 µs Arc voltage at 1 A Glow to arc transition current Glow voltage ~ 30 ~1 ~ 200 V A V Weight ~2 g Operation and storage temperature -40 ... +90 °C Climatic category (IEC 60068-1) 40/ 90/ 21 at 1 kV/µs Service life 10 1 10 1 1 - for 99 % of measured values - typical values of distribution operations operation operations operation operation 50 Hz; 1 s 5) 50 Hz; 9 cycles 5) 8/20 µs 5) 8/20 µs 5) 10/350 µs 5) Marking, blue negative 420 YY M O 420 YY M O KB AB E / KB AB PM Please read Cautions and warnings and Important notes at the end of this document. - Nominal voltage - Year of production - Month of production (1 ... 9 = Jan ... Sep; O ... D = Oct ... Dec) - Non radioactive Issue 02 / 2007-04-23 Page 2 of 4 Surge arrester 3-electrode arrester B88069X7820C203 T20-A420X 1) At delivery AQL 0.65 level II, DIN ISO 2859 In ionized mode 3) Test according to ITU-T Rec. K.12 4) Tip or ring electrode to center electrode 5) Total current through center electrode, half value through tip respectively ring electrode. Terms in accordance with ITU-T Rec. K.12 and DIN 57845/VDE0845 2) Dimensional drawing Not to scale Dimensions in mm Non controlled document Cautions and warnings Surge arresters must not be operated directly in power supply networks. Surge arresters may become hot in case of longer periods of current stress (danger of burning). Surge arresters may be used only within their specified values. In case of overload, the lead contacts may fail or the component may be destroyed. Damaged surge arresters must not be re-used. KB AB E / KB AB PM Please read Cautions and warnings and Important notes at the end of this document. Issue 02 / 2007-04-23 Page 3 of 4 Important notes The following applies to all products named in this publication: 1. Some parts of this publication contain statements about the suitability of our products for certain areas of application. These statements are based on our knowledge of typical requirements that are often placed on our products in the areas of application concerned. We nevertheless expressly point out that such statements cannot be regarded as binding statements about the suitability of our products for a particular customer application. As a rule, EPCOS is either unfamiliar with individual customer applications or less familiar with them than the customers themselves. For these reasons, it is always ultimately incumbent on the customer to check and decide whether an EPCOS product with the properties described in the product specification is suitable for use in a particular customer application. 2. We also point out that in individual cases, a malfunction of passive electronic components or failure before the end of their usual service life cannot be completely ruled out in the current state of the art, even if they are operated as specified. In customer applications requiring a very high level of operational safety and especially in customer applications in which the malfunction or failure of a passive electronic component could endanger human life or health (e.g. in accident prevention or life-saving systems), it must therefore be ensured by means of suitable design of the customer application or other action taken by the customer (e.g. installation of protective circuitry or redundancy) that no injury or damage is sustained by third parties in the event of malfunction or failure of a passive electronic component. 3. The warnings, cautions and product-specific notes must be observed. 4. In order to satisfy certain technical requirements, some of the products described in this publication may contain substances subject to restrictions in certain jurisdictions (e.g. because they are classed as “hazardous”). Useful information on this will be found in our Material Data Sheets on the Internet (www.epcos.com/material). Should you have any more detailed questions, please contact our sales offices. 5. We constantly strive to improve our products. Consequently, the products described in this publication may change from time to time. The same is true of the corresponding product specifications. Please check therefore to what extent product descriptions and specifications contained in this publication are still applicable before or when you place an order. We also reserve the right to discontinue production and delivery of products. Consequently, we cannot guarantee that all products named in this publication will always be available. 6. Unless otherwise agreed in individual contracts, all orders are subject to the current version of the “General Terms of Delivery for Products and Services in the Electrical Industry” published by the German Electrical and Electronics Industry Association (ZVEI). 7. The trade names EPCOS, EPCOS-JONES, Alu-X, Baoke, CeraDiode, CSSP, MLSC, PhaseCap, PhaseMod, SIFERRIT, SIFI, SIKOREL, SilverCap, SIMID, SIOV, SIP5D, SIP5K, UltraCap, WindCap are trademarks registered or pending in Europe and in other countries. Further information will be found on the Internet at www.epcos.com/trademarks. Page 4 of 4