1、Comments, suggestions or questions on this document should be addressed to Defense Supply Center Columbus, ATTN: VAT, Post Office Box 3990, Columbus, OH 43218-3990), or emailed to switchdla.mil. Since contact information can change, you may want to verify the currency of this address information usi
2、ng the ASSIST Online database at http:/assist.daps.dla.mil AMSC N/A FSC 5930 INCH-POUND MIL-DTL-9419G 25 March 2008 SUPERSEDING MIL-DTL-9419F 1 June 2001 DETAIL SPECIFICATION SWITCH, TOGGLE, MOMENTARY, FOUR-POSITION ON, CENTER OFF, GENERAL SPECIFICATION FOR This specification is approved for use by
3、all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers four-position, momentary on, center off, positive action switch with free return to the off position. 1.2 Classification. Switches covered by this specification will be classified by type as indi
4、cated herein (see 3.1). Type I - Snap action, positive break operation. Type II - Nonpositive break operation. 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 sec
5、tions 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, wheth
6、er 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 so
7、licitation or contract. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-9419G 2 DEPARTMENT OF DEFENSE STANDARDS MIL-STD-202 - Test Methods for Electronics and Electrical Component Parts. MIL-STD-810 - Environmental Engineering Considerations
8、and Laboratory Tests. (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch/ or http:/assist.daps.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
9、 documents 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. AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) ANSI/NCSL Z540-1 - General Requirements for Calibration Laboratories and Mea
10、suring and Test Equipment. (Copies of these documents are available online at http:/dod.nssn.org or from the American National Standards Institute (ANSI), 11 West 42nd Street, New York, NY 10036-8002, telephone 212-642-4900, fax 212-302-1286.) INTERNATIONAL ORGANIZATION FOR STANDARDS (IS0) ISO 10012
11、-1 - Quality Assurance Requirements for Measuring Equipment - Part 1; Metrological Confirmation System for Measuring Equipment. (Copies of these documents are available online at http:/dod.nssn.org or from the American National Standards Institute (ANSI), 11 West 42nd Street, New York, NY 10036-8002
12、, telephone 212-642-4900, fax 212-302-1286.) SOCIETY OF AUTOMOTIVE ENGINEERS (SAE) SAE-AS50881 - Wiring, Aerospace Vehicle. (Copies of these documents are available online at http:/www.sae.org or from Society of Automotive Engineers, 400 Commonwealth Drive, Warrendale, Pennsylvania, 15096-0001) UNDE
13、RWRITERS LABORATORIES (UL), INCORPORATED UL94 - Test for Flammability of Plastic Materials for Parts in Devices and Appliances. (Copies of these documents are available online at http:/ or from the Underwriters Laboratories, Inc., 333 Pfingsten Road, Northbrook, IL 60062-2002.) 2.4 Order of preceden
14、ce. 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 unless a specific exemption has been o
15、btained. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-9419G 3 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 o
16、f any conflict between the requirements of this specification and the specification sheet, the latter shall govern. 3.2 Qualification. Switches furnished under this specification, shall be products which are authorized by the qualifying activity for listing on the applicable qualified products list
17、at the time of award of contract (4.5 and 6.5). 3.3 Material. Material shall be as specified herein. When a definite material is not specified, a material shall be used which shall enable the switches to meet the performance requirements of this specification. Acceptance or approval of any constitue
18、nt material shall not be construed as a guarantee of acceptance of the finished product. 3.3.1 Metals. All metal parts, other than current-carrying parts, shall be of corrosion-resistant material, or shall be suitably plated to resist corrosion. 3.3.1.1 Ferrous material. Ferrous material shall not b
19、e used for current carrying parts. 3.3.1.2 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 which, in contact, tend toward active electrolytic corrosion (particularly
20、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 abutting surfaces is permitted. The use of dissimilar metals separated by a suitable insulating materiel is al
21、so permitted. For further guidance on the selection and use of metals see 6.7. 3.3.2 Insulating material. Molded material shall be used. Cellulose-filled phenolic shall not be used. 3.3.2.1 Plastic. The plastic material used in all external switch parts and enclosures shall be tested in accordance w
22、ith 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 detail specification or not. 3.3.3 Protective treatment. Materials that are subject to deterioration when exposed to climatic and env
23、ironmental conditions likely to occur during service usage shall be protected against such deterioration in a manner that will in no way prevent compliance with the performance requirements of this specification. The use of any protective coating that will crack, chip, or scale with age or extremes
24、of climatic and environmental conditions shall be avoided. 3.4 Interface and physical dimensions. Switches shall be of sufficiently rugged construction to meet the requirements of this specification. Switches shall be direct acting, normally open type incorporating a positive action to assure good c
25、ontact and snap feel with quick-make and quick-break circuits. Switches shall be designed to permit manual centering to the “off” position which shall permit breaking of welded contacts. Switches shall be constructed to assure free return of the movable contact member to the neutral “off” position w
26、hen relieved of any external actuation forces. Switches shall not permit dual contact in any possible position of the lever. Movement of the actuating lever shall close the circuit between the common terminal and each other terminal in the direction of lever travel, as indicated in the circuit diagr
27、am of the MS sheet or detail specification sheets. 3.4.1 Dimensions. Switches shall conform to the dimensions shown on the MS sheet or detail specification sheets. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-9419G 4 3.4.2 Mounting. Switch
28、 shall be operable when mounted in any attitude. 3.4.3 Stationary contact members and terminals. Stationary contact members and terminals shall be of such construction to meet the requirements of the specification. When terminals and contact members are separate pieces they shall be joined in a secu
29、re manner. All terminals shall be external and shall be treated to facilitate soldering. Silver plating shall not be used. Gold plating is allowable up to a thickness of .000030 inch to .000100 inch. 3.4.4 Cap. A cap of insulating material shall be fixed on the end of the actuating lever so that it
30、cannot be readily removed and shall not rotate relative to the switch. 3.4.5 Electrical ratings. As specified (see 3.1). 3.4.6 Screw threads. Screw threads shall be as specified on the specification sheet. 3.4.7 Pure tin. The use of pure tin, as an underplate or final finish, is prohibited both inte
31、rnally and externally. 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 6.3.6) 3.5 Performance. 3.5.1 Actuating force. When switches are tested as specified in 4.7.3, the actuating force shall be wit
32、hin the limits specified (see 3.1) 3.5.2 Actuating lever travel. When switches are tested as specified in 4.7.4, the actuating lever travel shall be as specified. 3.5.3 Strength of actuating lever pivot, lever stop and cap. When switches are tested as specified in 4.7.5, there shall be no breakage o
33、f the cap or body, loosening or rotation of terminals or other damage to the switch. 3.5.4 Strength of terminals. When switches are tested as specified in 4.7.6, there shall be no short circuit, breakage, loosening, rotation of terminals or other damage to the switch. 3.5.5 Electrical overload. When
34、 switches are tested as specified in 4.7.7, there shall be no electrical or mechanical damage. 3.5.6 Electrical endurance. When switches are tested as specified in 4.7.8, switch contacts under test shall open and close the circuit in proper sequence during each cycle of the switch actuating member.
35、3.5.7 Temperature rise. When switches are tested as specified in 4.7.9, the temperature rise shall not exceed 30 degree Celsius (C). 3.5.8 Dielectric withstanding voltage. When switches are tested as specified in 4.7.10, the switches shall withstand the application of the specified voltages without
36、arcing, flashover, breakdown of insulation, or damage; there shall be no current leakage in excess of 1 milliampere. 3.5.9 Vibration. When switches are tested as specified in 4.7.11, there shall be no separation of closed contacts or closure of open contacts having a duration exceeding 10 microsecon
37、ds. There shall be no evidence of damage. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-9419G 5 3.5.10 Shock. When switches are tested as specified in 4.7.12, the opening or closing of contacts shall not exceed 10 microseconds. 3.5.11 Accel
38、eration. When switches are tested as specified in 4.7.13, there shall be no closure of open contacts. 3.4.12 Moisture resistance. When switches are tested as specified in 4.7.14, there shall be no electrical or mechanical failures and the switches shall meet dielectric withstanding voltage test spec
39、ified herein. 3.5.13 Thermal shock. When switches are tested as specified in 4.7.15, there shall be no electrical or mechanical damage. 3.5.14 Altitude. When switches are tested as specified in 4.7.16, there shall be no electrical or mechanical damage. 3.5.15 Salt spray. When switches are tested as
40、specified in 4.7.17, there shall be no electrical failures, or breaking, spalling, cracking, or loosening of terminals. 3.5.16 Fungus. When switches are tested as specified in 4.7.18, there shall be no electrical or mechanical damage. This test may be waived by the preparing activity provided suitab
41、le evidence is provided that all materials used (such as fungus inert or treated) are non-nutrient. 3.5.17 Solderability (applicable to solderable terminations). 3.5.17.1 Small wire. When switches with solid wire terminations of .045 maximum diameter or stranded wire terminations of number 18 AWG or
42、 smaller are tested as specified in 4.7.19, the dipped surface of the termination: a. Shall be at least 95 percent covered by a continuous new solder coating. b. Shall not have pinholes or voids that are concentrated in one area or that exceed 5 percent of the total area. 3.5.17.2 Large wire. When s
43、witches with solder terminals, solid wire terminations greater than .045 diameter, and stranded wire terminations larger than number 18 AWG are tested as specified in 4.7.19, the dipped surface of the terminations: a. Shall have 95 percent of the total length of the filet, which is between the stand
44、ard wire wrap and the termination, tangent to the surface of the termination being tested and shall be free from pinholes and voids. b. Shall not have a ragged or interrupted line at the point of tangency between the filet and the termination under test. 3.5.18 Resistance to soldering heat (applicab
45、le to switches with solderable terminals) (not applicable to switches with integral lead wire terminals). When switches are tested as specified in 4.7.20, switches shall meet the switch resistance requirement, and there shall be no deformation or other damage at the conclusion of the test sequence.
46、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-9419G 6 3.5.19 Switch resistance. When measured as specified in 4.7.21, the switch resistance shall not exceed 25 milliohms initially and 40 milliohms after the mechanical endurance test. After
47、electrical endurance, the switch resistance shall not exceed 1 percent of the load impedance using the electrical parameters of the electrical endurance test load. For switches with integral lead wires, the switch resistance shall be as specified (see 3.1). 3.6 Marking. Switches shall be marked in a
48、ccordance with the following: a. MS part number or detail specification sheet part number. b. Switch manufacturers name, trademark or code symbol. c. Switch manufacturers part number. d. Date of manufacture; such as day, month, or year. 3.7 Workmanship. Switches shall be processed in such a manner a
49、s to be uniform in quality and free from cracked or displaced parts or other defects which effect life, serviceability, or appearance. Switches shall have an all over smooth, high finish surface and shall be free from warpage, checks, blisters, projecting ridges or chips. Gate marks shall not be considered a defect. 4. VERIFICATION 4.1. Responsibility for compliance. All items must meet all requirements of sections 3 and 5. The i
