MIL-C-11272E
6.5 Subject term (key word) listing.
Dielectric withstanding voltage
Dissipation factor
Insulation resistance
Quality factor
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6.6 Tin whisker growth. The use of alloys with tin content greater than 97 percent, by mass, may exhibit tin
whisker growth problems after manufacture. Tin whiskers may occur anytime from a day to years after manufacture
and can develop under typical operating conditions, on products that use such materials. Conformal coatings
applied over top of a whisker-prone surface will not prevent the formation of tin whiskers. Alloys of 3 percent lead, by
mass, have shown to inhibit the growth of tin whiskers. For additional information on this matter, refer to ASTM
B545, Standard Specification for Electrodeposited Coating of Tin.
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6.7. Environmentally preferable material. Environmentally preferable materials should be used to the maximum
extent possible to meet the requirements of this specification. As of the dating of this document, the U.S.
Environmentally Protection Agency (EPA) is focusing efforts on reducing 31 priority chemicals. The list of chemicals
is available on their website at https://www.epa.gov/epaoswer/hazwaste/minimize/chemlist.htm. Further information is
available at the following EPA site: https://www.epa.gov/epaoswer/hazwaste/minimize/. Included in the EPA list of 31
priority chemicals are cadmium, lead, and mercury. Use of the materials on the list should be minimized or
eliminated unless needed to meet the requirements specified herein (see Section 3).
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6.8 Part or Identifying Number (PIN) (see 1.2.1). The term "Part or Identifying Number (PIN)" is equivalent to the
term "type designation" that was used previously in this specification.
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6.9 Changes from previous issue. The margins of this specification are marked with asterisks to indicate where
changes from the previous issue were made. This was done as a convenience only and the Government assumes
no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the
requirements of this document based on the entire content irrespective of the marginal notations and relationship to
the previous issue.
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