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Forum: Reliability & Maintainability Questions and Answers

Topic: Reliability & Maintainability Questions and Answers

Topic Posted by: Reliability & Maintainability Forum (src_forum@alionscience.com )
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998

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Original Message:

Posted by: Daniel Mahoney
Date posted: Tue Feb 15 16:38:00 US/Eastern 2000
Subject: Filament Reliability
Message:
Hi all, Does anyone have any reliability data for filaments? Is there an equivalent 217 type I could use? Thanks in advance


Reply:

Subject: Filaments
Reply Posted by: Bruce Dudley (bdudley@iirti.org )
Organization: Reliability Analysis Center
Date Posted: Mon Feb 21 9:51:48 US/Eastern 2000
Message:
Mil-Hdbk-217 has a failure rate model for incandescentlamps which has tungsten filament as the primary failure mode. The accelerating failure factors for the tungsten material include voltage stress, percent utlization and type of current.


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