SAE GEIA-STD-0008-2011 Derating of Electronic Components (Formerly TechAmerica GEIA-STD-0008).pdf
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1、 TechAmerica Standard Derating of Electronic Components GEIA-STD-0008 August 2011 GEIA-STD-0008 ANSI/GEIA STD-0008-2012 Approved: Feb 9, 2012 NOTICE TechAmerica Engineering Standards and Publications are designed to serve the public interest by eliminating misunderstandings between manufacturers and
2、 purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards and Publications shall not in any respect preclude any member or nonmember of Te
3、chAmerica from manufacturing or selling products not conforming to such Standards and Publications, nor shall the existence of such Standards and Publications preclude their voluntary use by those other than TechAmerica members, whether the standard is to be used either domestically or international
4、ly. Standards and Publications are adopted by TechAmerica in accordance with the American National Standards Institute (ANSI) patent policy. By such action, TechAmerica does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Standard or P
5、ublication. This TechAmerica Standard is considered to have International Standardization implications, but the ISO/IEC activity has not progressed to the point where a valid comparison between the TechAmerica Standard and the ISO/IEC document can be made. This Standard does not purport to address a
6、ll safety problems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this Standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations before its use. (Formulated under the cognizan
7、ce of the TechAmerica G-12 Solid State Devices Committee.) This document is maintained under the ANSI/TechAmerica continuous maintenance program. Changes may be submitted at any time on any part of the standard using the TechAmerica Document Improvement Proposal at the back of this document or a sim
8、ilar method containing the same information. These comments shall be acted on for revision of the standard at the first meeting following working group resolution of the comment. Published by 2011 TechAmerica Standards & Technology Department 601 Pennsylvania Ave., NW North Building, Suite 600 Washi
9、ngton, DC 20004-2650 All rights reserved - Printed in U.S.A. PLEASE! DONT VIOLATE THE LAW! This document is copyrighted by TechAmerica and may not be reproduced without permission. Organizations may obtain permission to reproduce a limited number of copies by entering into a license agreement with o
10、ur distributors. For distributor information please see our web site www. techamerica.org/ or contact TechAmerica at 703-284-5355 TechAmerica Derating of Electronic Components GEIA-STD-0008 Revision Description of change Date - Initial Release Aug 2011 GEIA-STD-0008 i ACKNOWLEDGEMENTS Members of Tas
11、k Group GTG03-02 of the TechAmerica G-12 Solid State Devices Committee developed this document. The Task Group and Committee would like to recognize the principle contributors shown below and to extend gratitude to the many others who assisted in the evolution of this Standard. Ken Finney - Boeing W
12、es Hubbell - Raytheon John Nirschl - Rockwell-Collins Jeff Jarvis - ARMY Redstone Arsenal Dan Quearry - NAVY Crane Joe Flarity - Boeing FOREWORD Derating is a method of reducing stress and/or making quantitative allowances for a components functional degradation. Consequently, derating is a means of
13、 reducing failures, extending component life, and increasing reliability. In addition, derating helps protect components from unforeseen application anomalies and overstresses. Component derating may sometimes be difficult to achieve in some instances but is critical for systems being used in severe
14、 environments. When uncontrolled components are employed they often need protection from environmental conditions and/or need derating more than controlled components. GEIA-STD-0008 ii Contents Acknowledgements i Foreword i 1 PURPOSE . 1 1.1 Definitions 1 1.2 Scope . 1 1.3 Use of this Standard 1 1.4
15、 Components not addressed in this standard . 1 2 REFERENCE DOCUMENTS 2 3 REQUIREMENTS 2 Tables 1 Integrated Circuits 3 2 Semiconductors . 4 3 Optoelectronics 6 4 Resistors 7 5 Capacitors 8 6 Magnetics . 9 7 Fuses . 10 8 Contacts (switches/relays) . 11 9 Connectors, Wire, and Cable . 12 GEIA-STD-0008
16、 1 1 PURPOSE This document is generated to provide an industry standard for derating of electronic components. For the purposes of this document, the following definitions apply: 1.1 Definitions Controlled/Uncontrolled See paragraph 3 herein. Derate To reduce the rating(s) of a component to improve
17、its reliability or to permit operation at high ambient temperatures. Derating The reduction in rating of a component. Derating limits The maximum nominal stresses that a component is allowed to experience in an application. The Derating Limits are always less than the components rated maximum stress
18、es. 1.2 Scope This Standard specifies the minimum derating requirements for using electronic components in moderately severe environments. These environments are assumed to include Airborne Inhabited Cargo (AIC), Airborne Inhabited Fighter (AIF), Ground Mobile (GM), and Naval Sheltered (NS) environm
19、ents specified in MIL-HDBK-217. This Standard is intended to supersede the derating limits contained in Defense Standardization Program Office (DSPO) Standardization Directive SD-18, Naval Standard TE000-AB-GTP-010, and Air Force ESD-TR-85-148. It is intended that a future revision of this Standard
20、will include additional requirements for derating for other environments (e.g. Airborne Uninhabited Cargo). Since this Standard specifies the minimum derating requirements, (sub)contractors may derate in excess of these requirements. This Standard is not intended for use in space or launch system ap
21、plications, which have their own existing derating standards, and shall not be used for such applications unless specifically allowed by contract. 1.3 Use of this Standard It is intended that this Standard be called out in contractual documents, and that the call-out specify what to do in case the d
22、erating limits herein cannot be met in certain cases. 1.3.1 Sample contract language: The (sub)contractor shall derate electronic components in accordance with GEIA-STD-0008. In the event the (sub)contractor intends to exceed a derating limit, the (sub)contractor shall obtain customer approval of th
23、at exception. NOTE: JEP149 may be used as the basis of the engineering evaluations, which include the component supplier in determining alternate derating criteria that will meet the application reliability requirements. The customer may want to grant blanket approval of all derating exceptions that
24、 are successfully addressed by JEP149 engineering evaluations. 1.4 Components not addressed in this standard When a component is being used that is not addressed by this standard, the user is strongly encouraged to contact the appropriate TechAmerica chairperson (G-12 Chair for solid state component
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