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1998 ? document no. d10211ej5v0ds00 (5th) date published april 2002 n cp(k) printed in japan zener diodes rd2.0e to rd120e 500 mw planar type silicon zener diodes data sheet 2002 the information in this document is subject to change without notice. before using this document, please confirm that this is the latest version. not all devices/types available in every country. please check with local nec representative for availability and additional information. the rd2.0e to rd120e are zener diodes with an allowable dissipation of 500 mw and a planar type glass sealed dhd (double heatsink diode) structure. features ? the zener voltage series has a wide voltage range of 2 v to 120 v and is ideal for standardization. the e24 series is employed for the zener voltage nominal value. ordering information any of the b1 to b7 voltage classifications are available for customers who request the b grade product of the rd2.0e to rd39e. applications zener voltage and constant-current circuit waveform clipper circuit and limiter circuit surge absorption circuit package drawing (unit: mm) absolute maximum ratings (ta = 25 c) parameter symbol ratings unit remarks power dissipation p 500 mw junction temperature t i 175 c forward current i f 200 ma storage temperature t stg ?65 to +175 c surge reverse power p rsm 100 (t = 100 s) w refer to figure 6. marking color: black jedec: do-35

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notes 1. the zener voltage (v z ) of the b and b1 to b7 grades is tested for 40 ms after power on. 2. the operation resistance (z z , z zk ) is tested by superimposing a micro ac on the standard current (i z ). 3. the b grade is a composition of the b1 to b7 grades. any of the b1 to b7 voltage classifications are available for customers who request the b grade product.

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m8e 00. 4 the information in this document is current as of july, 2001. the information is subject to change without notice. for actual design-in, refer to the latest publications of nec's data sheets or data books, etc., for the most up-to-date specifications of nec semiconductor products. not all products and/or types are available in every country. please check with an nec sales representative for availability and additional information. no part of this document may be copied or reproduced in any form or by any means without prior written consent of nec. nec assumes no responsibility for any errors that may appear in this document. nec does not assume any liability for infringement of patents, copyrights or other intellectual property rights of third parties by or arising from the use of nec semiconductor products listed in this document or any other liability arising from the use of such products. no license, express, implied or otherwise, is granted under any patents, copyrights or other intellectual property rights of nec or others. descriptions of circuits, software and other related information in this document are provided for illustrative purposes in semiconductor product operation and application examples. the incorporation of these circuits, software and information in the design of customer's equipment shall be done under the full responsibility of customer. nec assumes no responsibility for any losses incurred by customers or third parties arising from the use of these circuits, software and information. while nec endeavours to enhance the quality, reliability and safety of nec semiconductor products, customers agree and acknowledge that the possibility of defects thereof cannot be eliminated entirely. to minimize risks of damage to property or injury (including death) to persons arising from defects in nec semiconductor products, customers must incorporate sufficient safety measures in their design, such as redundancy, fire-containment, and anti-failure features. nec semiconductor products are classified into the following three quality grades: "standard", "special" and "specific". the "specific" quality grade applies only to semiconductor products developed based on a customer-designated "quality assurance program" for a specific application. the recommended applications of a semiconductor product depend on its quality grade, as indicated below. customers must check the quality grade of each semiconductor product before using it in a particular application. "standard": com puters, office equipment, communications equipment, test and measurement equipment, audio and visual equipment, home electronic appliances, machine tools, personal electronic equipment and industrial robots "special": transportation equipment (automobiles, trains, ships, etc.), traffic control systems, anti-disaster systems, anti-crime systems, safety equipment and medical equipment (not specifically designed for life support) "specific": aircraft, aerospace equipment, submersible repeaters, nuclear reactor control systems, life support systems and medical equipment for life support, etc. the quality grade of nec semiconductor products is "standard" unless otherwise expressly specified in nec's data sheets or data books, etc. if customers wish to use nec semiconductor products in applications not intended by nec, they must contact an nec sales representative in advance to determine nec's willingness to support a given application. (note) (1) "nec" as used in this statement means nec corporation and also includes its majority-owned subsidiaries. (2) "nec semiconductor products" means any semiconductor product developed or manufactured by or for nec (as defined above). ? ? ? ? ? ?

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