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 switchesdla.mil. Since contact information can change, you may want to verify the currency of this address information using the A
2、SSIST Online database at https:/assist.dla.mil. AMSC N/A FSC 5930 INCH-POUND MIL-DTL-3950J 9 September 2013 SUPERSEDING MIL-DTL-3950H 1 October 2010 DETAIL SPECIFICATION SWITCHES, TOGGLE, ENVIRONMENTALLY SEALED GENERAL SPECIFICATION FOR This specification is approved for use by all Departments and A
3、gencies of the Department of Defense. 1. SCOPE 1.1 This specification covers the requirements for environmentally sealed toggle switches. 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 d
4、ocuments 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 of documents cited in sections 3 and
5、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 docum
6、ents are those cited in the solicitation or contract. FEDERAL SPECIFICATIONS A-A-59588 - Rubber, Silicone STANDARDS FED-STD-H28 - Screw-Thread Standards for Federal Services. DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-DTL-83133 - Turbine Fuels, Aviation, Kerosene Types, NATO F-34(JP-8), NATO F-35, and
7、 JP-8 + 100 or (NATO F-37). MIL-PRF-7808 - Lubricating Oil, Aircraft Turbine Engine, Synthetic Base. MIL-PRF-15160/2 - Fuses: Instrument, Power, and Telephone (Nonindicating), Style F02. MIL-PRF-87252 - Coolant Fluid, Hydrolytically Stable, Dielectric Provided by IHSNot for ResaleNo reproduction or
8、networking permitted without license from IHS-,-,-MIL-DTL-3950J 2 STANDARDS MIL-STD-202 - Electronic and Electrical Component Parts. MIL-STD-1285 - Marking of Electrical and Electronic Parts. (See supplement 1 for list of specification sheets). (Copies of these documents are available online at http
9、:/quicksearch.dla.mil/ or https:/assist.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 spec
10、ified, the issues of these documents are those cited in the solicitation or contract. AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) NCSL Z540.3 - Calibration of Measuring and Test Equipment, Requirements for (Copies of these documents are available online at http:/www.ansi.org or from the American Na
11、tional Standards Institute (ANSI), 125 West 43rd Street, New York, NY 10036-8002, telephone 212-642-4900.) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM-D5948 - Molding Compounds, Thermosetting, Standard Specification for. ASTM-E1119 - Glycol, Industrial Grade Ethylene, Standard Specificati
12、on for. ASTM-G21 - Materials to Fungi, Synthetic Polymeric, Determining Resistance of (Copies of these documents are available online at http:/www.astm.org or from the American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, Pennsylvania, 19428-2959.) INTERNATIONAL ORGAN
13、IZATION FOR STANDARDS (IS0) ISO 10012 - Measurement Management Systems - Requirements for Measurement Processes and Measuring Equipment (Copies of these documents are available online at http:/www.ansi.org or from the American National Standards Institute (ANSI), 125 West 43rd Street, New York, NY 1
14、0036-8002, telephone 212-642-4900.) IPC ASSOCIATION CONNECTING ELECTRONICS INDUSTRIES J-STD-002 - Solderability Tests for Component Leads, Terminations, Lugs, Terminals and Wires. J-STD-004 - Requirements for Soldering Fluxes. (Copies of these documents are available online at www.ipc.org/ or from A
15、merican National Standards Institute (ANSI), 11 West 42nd Street, New York, NY 10036-8002, telephone 212-642-4900) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3950J 3 SOCIETY OF AUTOMOTIVE ENGINEERS SAE-AS7928 - Terminals, Lug: Splices, C
16、onductor: Crimp Style, Copper, General Specification for. SAE-AS5086 - Wire, Electric, Polyvinyl Chloride Insulated, Copper or Copper Alloy. (Copies of these documents are available from Society of Automotive Engineers, 400 Commonwealth Drive, Warrendale, Pennsylvania, 15096-0001 or www.sae.org/) UN
17、DERWRITERS LABORATORIES, INC. (UL) UL94 - Tests for Flammability of Plastic Materials for Parts in Devices and Appliances. (Copies of these documents are available online at or from the Underwriters Laboratories, Inc., 333 Pfingsten Road, Northbrook, IL 60062-2002.) 2.4 Order of precedence. Unless
18、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. Nothing in this document, however, supersedes applicable laws and regulations
19、 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 speci
20、fication sheet, the latter shall govern. 3.2 Switch categories. Switches furnished under this specification shall be category I, category II, and category III, as defined in 3.2.1, 3.2.2, and 3.2.3, respectively. 3.2.1 Category I switches. Category I switches are completely defined by a MS standard
21、or specification sheet (see 3.1). 3.2.2 Category II switches (see 6.2). Category II switches are the same as category I switches except for minor differences such as termination configuration, operating characteristics, and minor actuator variations, which do not change the basic design or construct
22、ion of the qualified switch. Category II switches shall be acquired from a source listed on the Qualified Products List (QPL) for the particular similar product in category I. Category II switches are nonstandard. 3.2.3 Category III switches (see 6.2). Category III switches are not covered by MS sta
23、ndards or specification sheets. These switches are nonstandard. 3.3 Qualification. Category I switches furnished under this specification shall be products which are qualified for listing on the applicable QPL at the time set for opening of bids. 3.4 Material. Unless otherwise approved by the prepar
24、ing activity material shall be as specified herein. When a definite material is not specified, a suitable material shall be used which enables the switches to conform to the performance requirements of this specification. Acceptance or approval of any constituent material shall not be construed as a
25、 guaranty of the acceptance of the finished product. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3950J 4 3.4.1 Metals. All metal parts, other than current-carrying parts, shall be of corrosion-resistant material, or shall be suitably prot
26、ected to resist corrosion. Paint is not acceptable for corrosion protection. Ferrous material shall not be used for current-carrying parts. 3.4.1.1 Dissimilar metals. When dissimilar metals are used in intimate contact with each other, protection against electrolysis and corrosion shall be provided.
27、 The use of dissimilar metals which, in contact, tend toward active electrolytic corrosion (particularly brass, copper, or steel used in contact with aluminum or aluminum alloy) is not acceptable. However, metal plating or metal spraying of dissimilar base metals to provide similar or suitable abutt
28、ing surfaces is permitted. The use of dissimilar metals separated by a suitable insulating material is also permitted. For additional information and guidance on dissimilar metals see 6.7. 3.4.1.2 Pure tin. The use of pure tin, as an underplate or final finish, is prohibited both internally and exte
29、rnally. Tin content of switch components and solder shall not exceed 97 percent, by mass. Tin shall be alloyed with a minimum of 3 percent lead, by mass (see 6.9). The only exception allowed is if the pure tin is used on non-current carrying parts and said component is completely isolated from all c
30、urrent carrying parts by materials that are not electrically conductive. 3.4.2 Plastic materials. Unless otherwise specified (see 3.1), molded plastic material shall conform to ASTM D 5948-96. Stacked laminations shall not be used for the switch body. Other types of plastic materials may be used pro
31、vided the manufacturer submits acceptable evidence of performance to the qualifying activity during the qualification test program on the submitted product. The plastic material used shall be inert or fungus resistant in accordance with ASTM G-21 plastic material used in all external switch parts an
32、d enclosures shall be tested in accordance with UL94 and classified as 94V-0; this requirement applies to all materials for external parts and enclosures regardless of whether the material used is acquired to a specification or not. 3.4.3 Elastomer seals. The material for elastomer seals shall be si
33、licone rubber in accordance with A-A-59588. Other types of silicone rubber may be used provided the manufacturer submits acceptable evidence of performance to the preparing activity during the qualification test program on the submitted product. 3.5 Interface and physical dimension requirements. Swi
34、tches shall be of the interface and physical dimensions specified (see 3.1 and 3.2). 3.5.1 Toggle lever. The toggle lever shall be metal, shall have a lusterless finish, and shall be insulated from all current-carrying parts. 3.5.2 Attitude. Switches shall be constructed to assure proper operation w
35、hen mounted in any position. 3.5.3 Terminals. Terminals shall be as specified (see 3.1). Only the number of terminals required to accomplish the circuit characteristic shall be furnished. 3.5.3.1 Solderable terminals. Solderable terminals shall be treated to facilitate soldering. Silver plating shal
36、l not be used as the external coating. When gold plating is used because the terminals are integral with the gold contacts, its thickness shall be a minimum of 30 millionths of an inch and a maximum of 100 millionths of an inch. Terminals shall be designed so that wires can be mechanically secured p
37、rior to soldering. Terminals may be tapped or drilled after coating. 3.5.3.2 Screw terminals. Screw terminals shall be provided with the hardware specified (see 3.1 and the appendix herein). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-395
38、0J 5 3.5.4 Mounting bushing. The mounting bushing shall be as specified (see 3.1). The bushing shall be provided with a seal between the toggle lever and the switching mechanism. The body of the elastomer seal shall not protrude from the top of the mounting bushing with the exception of the tapered
39、joint or meniscus where the seal joins the toggle lever, which may be permitted to exceed the height of the mounting bushing slightly. 3.5.5 Hardware. For direct Government acquistion, all hardware (see 3.1), mounting, and terminal, shall be supplied in a separate package and packaged with the switc
40、h. QPL sources may provide switches to sources, other than the Government, without hardware and may mark these switches with the appropriate MS or M part number. Crimp pin contacts, for switches with integrated wire termination, are not supplied with the switch. 3.5.5.1 Mounting hardware. The mounti
41、ng hardware shall be as specified (see 3.1). 3.5.5.2 Terminal hardware. The terminal hardware shall be as specified (see 3.1). 3.5.6 Anti-rotational means. All switches shall be designed to have an anti-rotational mounting means which shall be as specified (see 3.1). 3.5.7 Screw threads. Screw threa
42、ds on external threaded parts shall be in accordance with FED-STD-H28. Threading of nonmetallic parts shall not be permitted. Terminal thread engagement shall be at least two full threads. 3.5.8 Solder. Where solder is employed, flux shall be in accordance with J-STD-004. Solder shall not be used to
43、 obtain mechanical strength. 3.5.9 Weight. Weight shall be as specified (see 3.1). 3.6 Performance. 3.6.1 Solderability (applicable to solderable terminals). When switches are tested as specified in 4.8.2, the criteria for acceptable solderability shall be in accordance with ANSI/J-STD-002. 3.6.2 Re
44、sistance to soldering heat (applicable to solderable terminals). When switches are tested as specified in 4.8.3, the switches shall remain operable. When opened, there shall be no internal deformation or damage. 3.6.3 Switching characteristics. When tested as specified in 4.8.4, switches shall opera
45、te as specified (see 3.1). 3.6.4 Strength of terminals. When switches are tested as specified in 4.8.5, there shall be no breakage, loosening, or rotating of terminals, and no damage to the switch body. 3.6.5 Strength of toggle lever, pivot, and lever stop. When switches are tested, as specified in
46、4.8.6, there shall be no malfunction damage, breakage, or short circuit; switches shall operate mechanically and electrically. 3.6.6 Strength of mounting bushing. When switches are tested as specified in 4.8.7, there shall be no loosening of the mounting bushing or other mechanical damage. 3.6.7 Con
47、tact voltage drop. When switches are tested as specified in 4.8.8., the contact voltage drop shall not exceed 2.5 millivolts initially and 5 millivolts after mechanical endurance. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3950J 6 3.6.8
48、Dielectric withstanding voltage. When switches are tested as specified in 4.8.9, the switches shall withstand the application of the specified voltages without arcing, flashover, breakdown of insulation, or damage; there shall be no momentary flashover or leakage current in excess of five hundred mi
49、croamperes. 3.6.9 Mechanical endurance. When switches are tested as specified in 4.8.10, there shall be no deterioration of the toggle seal, mechanical breakage, or malfunction. Circuitry and degree of toggle level movement shall be as specified (see 3.1). 3.6.10 Electrical overload, electrical endurance, intermediate current, low-level life, and temperature rise. When switches are tested as specified in 4.8.11, each pair of switch
