MIL-PRF-87164 Capacitors, Fixed, Mica Dielectric, High Reliability, General Specification For \(See Notice 1 For Replacement Information\)This specification covers the general requirements for high reliability, mica dielectric, fixed capacitors for space, missile, and other high reliability applications. Capacitors covered by this specification may be used in critical applications where the utmost in stability and dependability is required and where variations in capacitance with respect to temperature, voltage, frequency, and life cannot be tolerated \(see 6.1\). An acceleration factor of 25:1 has been used to relate life test data obtained at 150 percent of rated voltage at rated temperature to rated voltage at rated temperature.

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MIL-PRF-87164A

STANDARDS

DEPARTMENT OF DEFENSE

MIL-STD-202

Test Methods Standard Electronics and Electrical Component Parts.

MIL-STD-790

Standard Practice for Established Reliability and High Reliability Qualified

Products List (QPL) Systems for Electrical, Electronic, and Fiber Optic Parts

Specifications.

MIL-STD-810

Environmental Test Methods and Engineering Guidelines.

MIL-STD-1285

Marking of Electrical and Electronic Parts.

(Unless otherwise indicated, copies of the above specifications, standards, and handbooks are available from the

Defense Automated Printing Service, Building 4D (DPM-DODSSP), 700 Robbins Avenue, Philadelphia, PA 19111-

5094.)

2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited

herein (except for related associated specifications, specification sheets, or MS standards), 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 sheets. The individual item requirements shall be as specified herein and in accordance with

the applicable specification sheet. In the event of any conflict between the requirements of this specification and the

specification sheet, the latter shall govern.

3.2 Qualification. The capacitors furnished under this specification shall be products which are qualified for listing

on the applicable QPL at the time set for opening of bids. Distributors shall not be used (see 4.4 and 6.3).

3.3 QPL system. The manufacturer shall establish and maintain a QPL system for parts covered by this

specification. Requirements for this system are specified in MIL-STD-790 and herein. As part of the MIL-STD-790

QPL system, the manufacturer shall establish and document a system which would include the following:

Traceability of materials

Capacitor design requirements

Silver to mica attachment

Assembly

Termination and connections

Encapsulation

Curing

Solder formulation

Visual inspection criteria.

3.4 Material. The material shall be as specified herein. However, when a definite material is not specified, a

material shall be used that 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.

3.4.1 Terminal leads. Lead shall be solderable and meet the solderability requirements of 3.12.

3.5 Interface and physical dimensions. The capacitors shall be of the interface and physical dimensions specified

(see 3.1).

3.5.1 Tin plated finishes. Tin plating is prohibited as a final finish or as an undercoat. Tin-lead (Sn-Pb) finishes

are acceptable provided that the minimum lead content is three percent (see 6.4).