1、AMSC N/A FSC 5945 MIL-PRF-83726E 01 September 2011SUPERSEDING MIL-PRF-83726D 17 November 2008 PERFORMANCE SPECIFICATION RELAYS, HYBRID AND SOLID STATE, TIME DELAY, GENERAL SPECIFICATION FOR This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE
2、1.1 Scope. This specification establishes the general requirements for time delay relays that are a combination of hybrid microcircuits, solid state electronics with an integral electromagnetic relay, or solid state output. Relays covered by this specification are intended for use in aerospace and a
3、ssociated ground support electrical and electronic systems and equipment (see 6.1). For additional application and caution information see 6.1. 1.2 Classification. Time delay relays covered by this specification are of the following types and classes, as specified (see 3.1 and 6.10): Type I - Time d
4、elay on operate. IIA - Time delay on release (separate control and power terminals). IIB - Time delay on release (true). III - Interval timer. IV - Repeat cycle timer. V - Time sequence as specified (see 3.1). Class A - Hybrid (integral electromagnetic relay qualified to MIL-PRF-39016). B - Hybrid (
5、integral electromagnetic relay qualified to MIL-PRF-83536). C - Solid state. 1.2.1 Ratings. Time delay relays with electromechanical relay output and with contact ratings 10 A or greater are covered in class B. 1.2.2 Part or Identifying Number (PIN). PINs to be used for relays acquired to this speci
6、fication are created as follows: M 83726 /5 -0001 -P | | M prefix Specification Slash Dash Mounting designator sheet number sheet number number type when applicable Contact information is as follows: INCH-POUND Comments, suggestions or questions on this document should be addressed to DLA Land and M
7、aritime, 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 ASSIST Online database at https:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reprodu
8、ction or networking permitted without license from IHS-,-,-MIL-PRF-83726E 2 2.1 General. The documents listed in this section are specified in section 3 and section 4 of this specification. This section does not include documents cited in other sections of this specification or recommended for addit
9、ional 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 of documents cited in section 3 and section 4 of this specification, whether or not they are listed. 2.2 Government
10、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. FEDERAL STANDARDS
11、FED-STD-H28 - Screw Thread Standards for Federal Services. COMMERCIAL ITEM DESCRIPTIONS A-A-55568 - Headset-Microphone, Lightweight, General Requirements for DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-PRF-15160/2 - Fuse, Instrument, Power, and Telephone (Nonindicating), Style F02. MIL-PRF-15160/3 - Fu
12、se, Instrument, Power, and Telephone (Nonindicating), Style F03. MIL-PRF-38534 - Hybrid Microcircuits, General Specification for. MIL-PRF-39016 - Relays, Electromagnetic, Established Reliability, General Specification for. MIL-PRF-83536 - Relays, Electromagnetic, Established Reliability, General Spe
13、cification For. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-202 - Electronic and Electrical Component Parts. MIL-STD-461 - Requirements for the Control of Electromagnetic Interference Characteristics of Subsystems and Equipment. MIL-STD-704 - Aircraft Electric Power Characteristics. MIL-STD-790 - Establ
14、ished Reliability and High Reliability Qualified Products List (QPL) Systems for Electrical, Electronic, and Fiber Optic Parts Specifications. MIL-STD-883 - Microcircuits. MIL-STD-1285 - Marking of Electrical and Electronic Parts. (Copies of these documents are available online at https:/assist.daps
15、.dla.mil/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 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 ar
16、e those cited in the solicitation or contract. AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) ANSI Y32.2 - Graphic Symbols for Electric and Electronic Diagrams. (Applications for copies are available online at http:/www.ansi.org or should be addressed to American National Standards Institute (ANSI), 1
17、1 West 42ndStreet, New York, NY 10036-8002.) TECHAMERICA FOUNDATION Techamerica EIA-557-B - Statistical Process Control Systems. (Applications for copies are available online at http:/www.techamerica.org/ or should be addressed to the Techamerica, 601 Pennsylvania Avenue NW, North Building, Suite 60
18、0, Washington DC 20004.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-83726E 3 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 specification sheets),
19、 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 Specification sheets. The individual item requirements shall be as specified herein and
20、 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. 3.2 Pure tin. The use of pure tin relays as an underplate or final finish, is prohibited both internally and externall
21、y. Tin content of relalys 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). 3.3 Qualification. Relays furnished under this specification shall be products that are authorized by the qualifying activity for listing on the applic
22、able qualified products list before contract award (see 4.2 and 6.3). 3.4 Qualified Products List (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. 3.4.1 Statistical Process Cen
23、ter (SPC). As part of the overall MIL-STD-790 QPL system, the manufacturer shall establish an SPC system that meets the requirements of EIA-557-B. 3.4.2 Electrostatic discharge (ESD) control program. As part of the overall MIL-STD-790 QPL system, the manufacturer shall establish and maintain an ESD
24、control system. As a minimum, this program shall address the identification of ESD sensitive (ESDS), sub-components and end items, facilities, training design protection, handling procedures, marking, cleaning, packaging, and verification. A model ESD control program is available from the qualifying
25、 activity and may be used as a guideline document. Further guidance for ESD control is available from the EOS/ESD Association and the Electronics Industry Association (EIA). 3.5 Materials. Materials shall be as specified herein. However, when a definite material is not specified, a material shall be
26、 used which will enable the relay to meet the performance requirements of this specification. Materials used shall be fungus inert, 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
27、 enclosures, cause contamination, or form current carrying tracks which prevent meeting the post test requirements specified herein. The use of silicone (see 6.10) or silicone compounds for any purpose other than external gaskets is prohibited. The selection of materials shall be as such as to provi
28、de maximum shelf life. Acceptance or approval of any constituent material shall not be construed as a guaranty of the acceptance of the finished product. 3.5.1 Metals. Metals shall be of a corrosion-resistant type or shall be plated or treated to resist corrosion. The use of mercury or mercury compo
29、unds is prohibited. The use of magnesium or magnesium alloys is prohibited (not applicable to contact systems). 3.5.1.1 Plated finishes. a. Pure tin plating is prohibited internally and externally. Tin-lead finish is acceptable provided that the minimum lead content is 3 percent. Other tin alloys ar
30、e acceptable as approved by the qualifying activity. b. Pure zinc plating is prohibited internally and externally. c. Pure cadmium plating is prohibited internally and externally. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-83726E 4 3.5.1
31、.2 Dissimilar metals. When dissimilar 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
32、with aluminum or aluminum alloy), 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 6.6. In hermetic seals, the 0.25 volt difference between the header materia
33、l and the housing material is not applicable. 3.5.2 Magnet wire. Magnet wire shall be of such quality as to ensure that the relay meets all the performance requirements of this specification. Additional information and guidance on magnet wire is provided in 6.9. 3.6 Interface and construction requir
34、ements. Relays shall meet the interface and construction requirements (weight or physical dimensions) as specified (see 3.1). 3.6.1 Integral electromagnetic relay (class A and class B relays). For hybrid relays covered by this specification, where the time delay circuitry is external to the integral
35、 electromagnetic relay, the integral electromagnetic relay (mounting means, housing, and terminal styles excepted) shall have been tested and qualified to the following specifications, as applicable (see 3.1). For hybrid relays covered by this specification, where the time delay circuitry is contain
36、ed inside the integral electromagnetic relay, the integral electromagnetic subassembly shall be similar in design and construction to, and manufactured with essentially the same materials and processes as, a family of relays that are qualified to the following specifications, as applicable (see 3.1)
37、. The integral electromagnetic subassembly shall be subjected to an unmonitored 3,000 cycle mechanical run-in at room ambient temperature in a nitrogen atmosphere prior to connection to the time delay circuitry. The cycle rate shall be 600 cycles per minute 100 cycles per minute. Class A - - - - - -
38、 - - - - - - - - MIL-PRF-39016 B - - - - - - - - - - - - - - MIL-PRF-83536 3.6.2 Electronic components. All active components shall be hermetically sealed or sealed in a hermetic package. 3.6.3 Case. The case shall be of sufficient mechanical strength to withstand the normal abuse incurred in handli
39、ng, transit, storage, and installation without malfunction or distortion of parts. 3.6.3.1 Case grounding. The case shall not be part of the electrical circuit but it may be part of the magnetic circuit. The case, or permanent attachments thereto, shall provide a means of electrical grounding. 3.6.4
40、 Sealing process. Hermetically sealed (non-potted) relays shall be dried, degassed, and backfilled with an atmosphere and sealed by welding such that the requirements of this specification are met. Adjunct sealant, (see 6.10), if used, must comply with the following characteristics: a. Shall not ext
41、end above 20 percent of the length of the exposed terminals above the glass meniscus. b. Trace color is permitted if it is a natural result of the sealant process. c. Shall form, after curing, a permanent, nonconductive, noncracking seal under all relay environments. d. Adjunct sealant shall only be
42、 applied to relays that have initially passed the gross leak seal requirement of this specification. 3.6.5 Enclosures. 3.6.5.1 Unsealed enclosure. Unsealed relays shall be totally enclosed for mechanical and dust protection and shall be explosion-proof. The enclosure design shall be such that pressu
43、re differentials cannot exist between the inside and outside. Metal covers shall be provided with a means for grounding as specified. 3.6.5.2 Hermetically sealed enclosure. Hermetically sealed enclosures shall be dried, degassed, and backfilled with an atmosphere and sealed such that the requirement
44、s of this specification are met. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-83726E 5 3.6.5.3 Environmentally sealed (non-hermetic enclosures). Environmentally sealed enclosures shall be constructed by any means other than that defined un
45、der hermetically sealed enclosure (see 3.6.5.2) to achieve the degree of seal specified (see 3.1). 3.6.5.4 Grounding enclosures. The mounting shall provide an effective electrical contact to ground when the relay is mounted. 3.6.6 Threaded parts. Unless otherwise specified (see 3.1), all threaded pa
46、rts shall be in accordance with FED-STD-H28. Where practical, all threads shall conform to the coarse thread series. The fine thread series shall be used only when beneficial to the application. 3.6.7 Installation clearances. Adequate clearance shall be provided for installation of terminals and mou
47、nting hardware. Special installation tools shall not be required. 3.6.8 Contacts. Contacts shall have load ratings and arrangements (see MIL-STD-1285) as specified (see 3.1). Unless otherwise specified (see 3.1), contacts shall be capable of carrying the maximum rated current continuously as well as
48、 making and breaking the specified current under all environmental conditions specified herein. 3.6.9 Coils. Coils shall be adequately insulated electrically from the contacts and the case. The resistance and rated voltage (or current) shall be as specified (see 3.1). Unless otherwise specified (see
49、 3.1), coils shall be designed for continuous operation at maximum rated voltage and temperature. 3.6.9.1 Coil terminal identification. Terminals identification shall be marked as specified and in accordance with MIL-STD-1285. When specified, a bead of contrasting color shall be used to designate the X1 (positive, if applicable)
