MIL-C-25F
2.3 Non-Government publications. The following documents form a part of this document to the extent specified
herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract.
AMERICAN SOCIETY FOR TESTING MATERIALS
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Standard Test Method for Flash and Fire Points by Cleveland Open Cup Tester.
ASTM D92
(Copies of this document may be ordered online at www.astm.org or from the American Society for Testing
Materials, 1916 Race Street, Philadelphia, PA 19103.)
2.4 Order of precedence. Unless otherwise specified herein or in the contract, in the event of a conflict between
the text of this document and the references cited herein (except for related specification sheets), the text of this
document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless
a specific exemption has been obtained.
3. REQUIREMENTS
3.1 Specification sheet. The individual item requirements shall be as specified herein and in accordance with the
applicable specification sheet. In the event of any conflict between requirements of this specification and the
specification sheet, the latter shall govern (see 6.2).
3.2 Qualification. Capacitors furnished under this specification shall be products that are authorized by the
qualifying activity for listing on the applicable qualified products list before contract award (see 4.4 and 6.3).
3.3 Material. The material shall be as specified herein. However, when a definite material is not specified, a
material shall be used which will enable the capacitors to meet the performance requirements of this specification.
Acceptance or approval of any constituent material shall not be construed as a guaranty of the acceptance of the
finished product.
3.3.1 Insulation, impregnating, and sealing compounds. Compounds used in the impregnation and filling of
capacitors shall be chemically inactive with respect to the capacitor unit and the case (see 3.4.1, 6.11, and 6.12).
The compounds, either in the state of original application or as a result of having aged, shall have no adverse effect
on the performance of the capacitor. For liquid-filled capacitors, the same material shall be used for impregnating as
is used for filling.
3.3.2 Metals. Metals shall be of a corrosion resisting type, or shall be plated or treated to resist corrosion (see
3.11).
3.4 Interface and physical dimensions. Capacitors shall meet the interface and physical dimensions specified (see
3.1).
3.4.1 Case. Each capacitor shall be enclosed in a hermetically-sealed metal case which will protect the capacitor
element from moisture and mechanical damage under all of the specified test conditions.
3.4.2 Capacitor elements. The capacitor elements shall consist of conducting layers separated by two or more
layers of dielectric tissues (paper).
3.4.2.1 Noninductive construction. Capacitors having capacitance and dc voltage ratings equal to or less than 1
microfarad and 3,000 volts, respectively, shall have extended foil construction, tab construction, or an equivalent
construction. When tab construction is used, each pair of tabs shall be brought out from opposite foils within one turn
3.4.3 Terminals.
3.4.3.1 Case as terminal. When the case is a terminal, any protective coating applied to the mounting surface
shall be such as to provide a direct conducting path for an electric current from the case to the surface on which it is
mounted.
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