1、Comments, suggestions or questions on this document should be addressed to DLA Land and Maritime, ATTN: VAT, Post Office Box 3990, Columbus, OH 43218-3990, or emailed to relaydla.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSI
2、ST Online database at https:/assist.daps.dla.mil/. AMSC N/A FSC 5945 INCH-POUND MIL-DTL-83725D 7 October 2011 SUPERSEDING MIL-DTL-83725C 14 March 2002 DETAIL SPECIFICATION RELAYS, VACUUM, GENERAL SPECIFICATION FOR This specification is approved for use by all Departments and Agencies of the Departme
3、nt of Defense. 1. SCOPE 1.1 Scope. This specification establishes the general requirements for relays with vacuum dielectric (see 6.3) for use in high or low voltage circuits of electronic and electrical equipment (see 6.1). 1.2 Part or Identifying Number (PIN). The PIN consists of the letter “M“, b
4、asic specification number; specification sheet number, and an assigned dash number (see 3.1), as shown in the following example: M 83725 /5 -001 Military General Specification Dash designator specification sheet number number number 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this s
5、ection 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
6、 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 do
7、cument to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. FEDERAL FED-STD-H28 - Screw Thread Standards for Federal Services. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-202 - Test Methods for Electronic and Electrica
8、l Component Parts. MIL-STD-1285 - Marking of Electrical and Electronic Parts. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-83725D 2 HANDBOOKS MIL-HDBK-454 - Electronic Equipment, General Guidelines for. (Copies of these documents are avail
9、able online at https:/assist.daps.dla.mil/quicksearch or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise
10、 specified, the issues of these documents are those cited in the solicitation or contract. AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) ANSI J-STD-004 - Requirements for Soldering Fluxes. (Application for copies can be found online at http:/www.ansi.org/ or 25 West 43rd Street, New York, NY 10036-80
11、02, telephone 212-642-4900, fax 212-302-1286) 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.
12、 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 even
13、t of any conflict between the requirements of this specification and the specification sheet, the latter shall govern. 3.2 Qualification. The relays furnished under this specification shall be a product which has been tested, and has passed the qualification inspection specified herein, and has been
14、 listed on or approved for listing on the applicable Qualified Products List (QPL). 3.3 Materials. Materials shall be as specified herein. However, when a definite material is not specified, a material shall be used which will enable the relay to meet the performance requirements of this specificati
15、on. Materials used shall be fungus inert (see 6.6), self-extinguishing; and shall not support combustion, give off noxious gases in harmful quantities, give off gases in quantities sufficient to cause explosion of sealed enclosures, cause contamination to any part of the relay, or form current carry
16、ing tracks when subjected to any of the tests specified herein. The selection of materials shall be such as to provide maximum shelf life. After qualification, any change of parts or material shall be submitted to the Government qualifying activity for approval. Acceptance or approval of any constit
17、uent material shall not be construed as a guaranty of the acceptance of the finished product. 3.3.1 Metals. Metals shall be of a corrosion-resistant type or shall be plated or treated to resist corrosion. The use of mercury or mercury compounds is prohibited. The use of magnesium or magnesium alloys
18、 is prohibited (not applicable to contact systems). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-83725D 3 3.3.1.1 Plated finishes. a. Pure tin plating as an underplate or final finish, is prohibited both internally and externally. Tin cont
19、ent of (product) and solder shall not exceed 97 percent, by mass. Tin shall be alloyed with a minimum of 3 percent lead, by mass (see 6.8). b. Pure zinc plating is prohibited internally and externally. c. Pure cadmium plating is prohibited internally and externally. 3.3.1.2 Dissimilar metals. When d
20、issimilar metals are used in intimate contact with each other, protection against electrolysis and corrosion shall be provided. The use of dissimilar metals in contact, which tends toward active electrolytic corrosion (particularly brass, copper, or steel used in contact with aluminum or aluminum al
21、loy), is not acceptable. However, metal spraying or metal plating of dissimilar base metals to provide similar or suitable abutting surfaces is permitted. Dissimilar metals should be as defined in 6.5. In hermetic seals, the 0.25 volt difference between the header material and the housing material i
22、s not applicable. 3.3.2 Magnet wire. Magnet wire shall be of such quality as to ensure that the relay meets all the performance requirements of this specification. 3.3.3 Plastic. Plastic shall be of such quality as to ensure that the relay meets all the performance requirements of this specification
23、 3.3.4 Ceramic. Ceramic shall be of such quality as to ensure that the relay meets all the performance requirements of this specification. 3.3.5 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum ex
24、tent possible provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.4 Interface and construction. Relays shall meet the interface and construction requirements specified in 3.1 (weight, physical dimensions
25、, etc). 3.4.1 Enclosure. The enclosure shall be of the type and within the dimensional limits specified on the applicable specification sheet (see 3.1). 3.4.2 Soldering. When soldering is employed, the use of flux shall be avoided whenever possible. If the use of flux is warranted, flux should be in
26、 accordance with ANSI J-STD-004. Soldering should be in accordance with guideline of MIL-HDBK-454. 3.4.3 Weight. The weight shall be as specified (see 3.1). 3.4.4 Threaded parts. All threaded parts shall be in accordance with FED-STD-H28. Whenever practical, all threads shall be in conformity with t
27、he coarse-thread series. The fine-thread series shall be used only for applications that might show a definite advantage through their use. Where a special diameter-pitch combination is required, the thread shall be of American National form and of any pitch between 16 and 36 which is used in the fi
28、ne-thread series. 3.4.5 Coil. The coil shall be insulated electrically from the housing and the contacts. 3.4.5.1 Coil mounting. The coil shall be mounted in such a manner that it will not loosen or become displaced during any of the tests specified herein. Provided by IHSNot for ResaleNo reproducti
29、on or networking permitted without license from IHS-,-,-MIL-DTL-83725D 4 3.4.6 Contact arrangement. Relays shall have the contact arrangement specified (see 3.1). Terminals shall be as specified (see 3.1). Solder terminals shall be hot tinned dipped or solder coated. Unless otherwise specified, gold
30、 plated terminals shall not be used. 3.5 Dielectric withstanding voltage. When tested as specified in 4.5.2, the relays shall withstand the applications of the specified voltage without damage or breakdown. Any arcover (air discharge), flashover (surface discharge), or breakdown (puncture) causing e
31、xcessive leakage current shall constitute failure. Unless otherwise specified (see 3.1), leakage current shall be considered excessive if greater than 30 microamperes root mean square (rms) continuous or more than (2) current surges of 100 microamperes or higher. 3.6 Insulation resistance. When rela
32、ys are measured as specified in 4.5.3, the insulation resistance shall be 1,000 megohms minimum, unless otherwise specified (see 3.1). 3.7 Electrical characteristics. 3.7.1 DC resistance (coil). When relays are tested as specified in 4.5.4.1, DC resistance (coil) shall be as specified (see 3.1). 3.7
33、.2 Contact bounce. When relays are tested as specified in 4.5.4.2, bounce time (see 6.3.5) shall be as specified (see 3.1). 3.7.3 Coil current. When relays are tested as specified in 4.5.4.3, the coil current shall be as specified (see 3.1). 3.7.4 Pickup and dropout voltage (or current). Relays shal
34、l pickup and all switching circuits shall close or open, as applicable, in the energized position when the energizing voltage (or current) is increased to a value equal to the maximum value specified, and must drop out before the energizing voltage (or current) is reduced to a value equal to the min
35、imum value specified (see 3.1). For qualification inspection, unless otherwise specified (see 3.1), the pickup and dropout voltages (or currents) shall fall within the applicable limits when the relay is mounted in each of three mutually perpendicular planes (see 4.5.4.3 and 4.5.4.4). 3.7.5 Operate
36、and release time. When specified (see 3.1), the relays shall be tested in accordance with 4.5.4.5. The operate and release time shall not include any contact bounce and shall be as specified (see 3.1). 3.7.6 Contact resistance. When relays are tested as specified in 4.5.4.6, the resistance of any pa
37、ir of mated contacts shall not exceed the value specified (see 3.1). 3.7.7 Capacitance. When relays are tested as specified in 4.5.4.7, the capacitance shall not exceed the value specified (see 3.1). 3.8 High and low temperature operation. When relays are tested as specified in 4.5.5, the relays sha
38、ll be free of mechanical defects and shall meet the requirements of dielectric withstanding voltage, insulation resistance, contact bounce, operate and release time and pickup and dropout voltage (or current) as specified in 3.5, 3.6, 3.7.2, 3.7.5, and 3.7.4 respectively. 3.9 Salt spray (corrosion).
39、 When relays are tested as specified in 4.5.6, there shall be no evidence of corrosion, no breaking, chipping, or flaking of the finish nor exposure of base metal due to corrosion which would adversely affect the application of performance characteristics of the relay. 3.10 Terminal strength. When r
40、elays are tested as specified in 4.5.7, the terminals shall not loosen nor shall there be any other damage. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-83725D 5 3.11 Vibration, high frequency. When tested as specified in 4.5.8, vibration
41、shall not impair operation and contact chatter shall not exceed 10 microseconds. Following the vibration test, the relays shall be free of any observable damage and meet the requirements of pickup and dropout voltage (or current) as specified 3.7.4. 3.12 Moisture resistance. When tested as specified
42、 in 4.5.9, relays shall meet the requirements of dielectric withstanding voltage and insulation resistance as specified in 3.5 and 3.6, respectively. 3.13 Shock (specified pulse). When relays are tested as specified in 4.5.10, contact chatter shall not exceed the value specified (see 3.1) and there
43、shall be no evidence of loosening of parts. 3.14 Seal. When relays are tested as specified in 4.5.11, they shall meet the requirements of 3.5. 3.15 Life (mechanical cycling). When tested as specified in 4.5.12, relays shall not exhibit any failure to operate 1/ or any failure to release 2/. The cont
44、act resistance shall not exceed twice the value specified (see 3.1) during any contact resistance check and the contact bounce shall not exceed twice the initial limits specified (see 3.1) when measured following the test. Other electrical characteristics shall be as specified (see 3.1) when measure
45、d following the test. 3.16 Thermal shock. When relays are tested as specified in 4.5.13, there shall be no damage to the relay, loosening of terminals, or cracking or flaking of glass insulation. 3.17 Load life (carry only). When relays are tested as specified in 4.5.14, the temperature shall not ex
46、ceed +125C at any time with any load current (see 3.1) or contact combination. 3.18 Resistance to solvents. When relays are tested as specified in 4.5.15, the marking shall remain legible. 3.19 Marking. Relays shall be marked in accordance with MIL-STD-1285 with the following information: a. Militar
47、y part number. b. Terminal identification (see 3.1). c. Manufacturers name, trademark, or code symbol. d. Date code. 3.20 Workmanship. The relays shall be fabricated in such a manner as to be uniform in quality, and shall be free from cracked or displaced parts, sharp edges, burrs, and other defects
48、 that will affect life, serviceability, and appearance. 4. VERIFICATION 4.1 Classification of inspection. The inspection requirements specified herein are classified as follows: a. Qualification inspection (see 4.3). b. Conformance inspection (see 4.4). Provided by IHSNot for ResaleNo reproduction o
49、r networking permitted without license from IHS-,-,-MIL-DTL-83725D 6 4.2 Inspection conditions. Unless specified herein, all inspections shall be made in accordance with the test conditions specified in the general requirements of MIL-STD-202. 4.3 Qualification inspection. Qualification inspection shall be performed at a laboratory acceptable to the government (see 6.4) on sample units produced with equipment and procedures normally used in p
