MIL-PRF-29C
2. APPLICABLE DOCUMENTS
2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This
section does not include documents cited in other sections of this specification or recommended for additional
information or as examples. While every effort has been made to ensure the completeness of this list, document
users are cautioned that they must meet all specified requirements documents cited in sections 3 and 4 of this
specification, whether or not they are listed.
2.2 Government documents.
2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks 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 (see 6.2).
DEPARTMENT OF DEFENSE STANDARDS
MIL-STD-202
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Test Methods Standard Electronics and Electrical Components Parts.
MIL-STD-1285
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Marking of Electrical and Electronic Parts.
(Copies of these documents are available online at https://assist.daps.dla.mil/quicksearch/ or from the
Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094).
2.3 Order of precedence. Unless otherwise noted 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
unless otherwise noted. Nothing in this document, however, supersedes applicable laws and regulations unless a specific
exemption has been obtained.
3. REQUIREMENTS
3.1 Requirements for individual resistor types. Requirements or exceptions applicable to individual resistor types
3.2 Qualification. Resistors furnished under this specification shall be products that are authorized by the
qualifying activity for listing on the applicable qualified products list (QPL) before contract award (see 4.4 and 6.3).
3.3 Materials. Materials shall be used which will enable the resistors 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.
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3.3.1 Fume-emitting material. Material that emits deleterious or toxic fumes at a temperature of 110 C or lower
shall not be used.
3.3.2 Ferrous material. Ferrous material shall not be used for current-carrying parts.
3.3.3 Pure tin. The use of pure tin, as an underplate or final finish is prohibited both internally and externally. Tin
content of resistor components and solder shall not exceed 97 percent, by mass. Tin shall be alloyed with a
minimum of 3 percent lead, by mass (see 6.4).
3.4 Interface and physical dimension requirements. Resistors shall meet the interface and physical dimensions
specified herein. Resistors shall consist of a resistance element or series of elements of the wirewound or film type.
3.4.1 Protective coating or enclosure. The resistor assemblies shall be protected by a coating or enclosure of
insulating and moisture-resistant material which shall completely cover the exterior of the resistance element,
including connections between any two elements or between any element and a terminal ferrule. This material shall
afford adequate protection against the effects of prolonged exposure to high humidity. The protective coating or
enclosure shall be such as to minimize the establishment of leakage paths between terminals, resulting from
collection of moisture film on the exterior surface of the resistor.
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