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Random Vibration Testing of Advanced Wet Tantalum CapacitorsAdvanced wet tantalum capacitors allow for improved performance of power supply systems along with substantial reduction of size and weight of the systems that is especially beneficial for space electronics. Due to launch-related stresses, acceptance testing of all space systems includes random vibration test (RVT). However, many types of advanced wet tantalum capacitors cannot pass consistently RVT at conditions specified in MIL-PRF-39006, which impedes their use in space projects. This requires a closer look at the existing requirements, modes and mechanisms of failures, specifics of test conditions, and acceptance criteria. In this work, different lots of advanced wet tantalum capacitors from four manufacturers have been tested at step stress random vibration conditions while their currents were monitored before, during, and after the testing. It has been shown that the robustness of the parts and their reliability are mostly due to effective self-healing processes and limited current spiking or minor scintillations caused by RVT do not increase the risk of failures during operation. A simple model for scintillations events has been used to simulate current spiking during RVT and optimize test conditions. The significance of scintillations and possible effects of gas generation have been discussed and test acceptance criteria for limited current spiking have been suggested.
Document ID
20150018413
Acquisition Source
Goddard Space Flight Center
Document Type
Presentation
Authors
Teverovsky, Alexander (ASRC Federal Space and Defense Greenbelt, MD, United States)
Date Acquired
September 28, 2015
Publication Date
March 23, 2015
Subject Category
Electronics And Electrical Engineering
Quality Assurance And Reliability
Report/Patent Number
GSFC-E-DAA-TN23782
Meeting Information
Meeting: Quality and Reliability Technical Symposium (QRTS)
Location: Mesa, AZ
Country: United States
Start Date: March 23, 2015
End Date: March 25, 2015
Sponsors: Electronic Components Industry Association
Funding Number(s)
CONTRACT_GRANT: NNG13CR48C
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
wet tantalum capacitors
PME
space electronics
reliability
cracking

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