1、INCH-POUNDMIL-PRF-49142B w/AMENDMENT 1 9 April 2008 SUPERSEDING MIL-PRF-49142B 27 October 2004 PERFORMANCE SPECIFICATION CONNECTOR, TRIAXIAL, RADIO FREQUENCY GENERAL SPECIFICATION FOR This specification is approved for use by Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope.
2、 This specification covers the general requirements and tests for radio frequency (RF), triaxial, connectors (see 6.1). 1.2 Classification. Connectors are of the following classes and Part or Identifying Number (PIN), as specified (see 3.1). 1.2.1 Classes. The class of connectors consists of the fol
3、lowing: a. Class 1: A class 1 connector is a connector which is intended to provide superior RF performance at specified frequencies, and for which all RF characteristics are completely defined. b. Class 2: A class 2 connector is intended to provide mechanical connection within an RF circuit providi
4、ng specified RF performance. 1.2.2 PIN. The PIN consists of the letter “M“ followed by the basic specification sheet number and a four digit dash number. The first digit of the dash number designates the material and finish of the connector body (shell); “0“ for silver plated brass, “7“ for nickel p
5、lated brass and “3“ for passivated corrosion resistant steel. The second digit of the dash number designates modified bayonet coupling mechanism keying when applicable (see figure 1). The third and fourth digits of the dash number are sequentially assigned. (See section 3 for specific plating requir
6、ements.) AMSC N/A FSC 5935 Comments, suggestions, or questions on this document should be addressed to Defense Supply Center Columbus, ATTN: VAI, P.O. Box 3990, Columbus OH 43218-3990 or email to RFConnectorsdscc.dla.mil. Since contact information can change, you may want to verify the currency of t
7、his address information using the ASSIST Online database at http:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49142B w/AMENDMENT 1 2PIN Example: M49142/XX X X XX Basic specification Specification sheet Body material a
8、nd finish Keying Sequentially assigned number 1.2.3 Categories. The categories of connectors are designated by an “A” (field serviceable) and “G” (field replaceable crimp center and outer contact) (see 3.1). a. Category A: Connectors which do not require special tools to assemble are designated as c
9、ategory A connectors. Standard wrenches, soldering equipment, pliers. etc., are not defined as special tools. b. Category G: Connectors which require only standard military crimp tools for the center contact and outer ferrule. The intermediate contact is assembled by a means other than solder. Piece
10、 parts are not defined. Stripping dimensions are given in the assembly instructions. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49142B w/AMENDMENT 1 3FIGURE 1 NOTES: 1. Bayonets are dimensioned in accordance with MIL-STD-348, unless othe
11、rwise specified. 2. All angle tolerances are 1. FIGURE 1. Keying configurations (TRB) only. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of this sp
12、ecification 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, 4, or 5 of this specification, whether or not
13、they are listed. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49142B w/AMENDMENT 1 42.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this docume
14、nt to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. FEDERAL STANDARDS FED-STD-H28 - Screw Thread Standards for Federal Services COMMERCIAL ITEM DESCRIPTIONS A-A-59588 - Rubber, Silicone DEPARTMENT OF DEFENSE ST
15、ANDARDS MIL-STD-202 - Test Methods for Electronic and Electrical Component Parts MIL-STD-348 - Radio Frequency Connector Interfaces for MIL-C-3643, MIL-C-3650, MIL-C-3655, MIL-C-25516, MIL-C-26637, MIL-PRF-39012, MIL-PRF-49142, MIL-PRF-55339, MIL-C-83517 MIL-STD-889 - Dissimilar Metals MIL-STD-1285
16、- Marking of Electrical and Electronic Parts (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch/ or http:/assist.daps.dla.mil or from the Standardization Documents Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Non-Government publ
17、ications. The following 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. ASTM INTERNATIONAL ASTM A342/A342M - Magnetic materials, Permeability of Feebly ASTM A484/A484M -
18、Standard Specification for General Requirements for Stainless Steel Bars, Billets, and Forgings ASTM A582/A582M - Standard Specification for Free-Machining Stainless Steel Bars ASTM B16/B16M - Standard Specification for Free-Cutting Brass Rod, Bar and Shapes for Use in Screw Machines ASTM B36/B36M -
19、 Standard Specification for Brass Plate, Sheet, Strip, and Rolled Bar ASTM B88 - Standard Specification for Seamless Copper Water Tube ASTM B121/B121M - Standard Specification for Leaded Brass Plate, Sheet, Strip, and Rolled Bar ASTM B139/B139M - Phosphor Bronze Rod, Bar and Shapes ASTM B152/B152M -
20、 Copper Sheet, Strip, Plate and Rolled Bar ASTM B194 - Standard Specification for Copper-Beryllium Alloy Plate, Sheet, Strip, and Rolled Bar ASTM B196/B196M - Standard Specification for Copper-Beryllium Alloy Rod and Bar ASTM B197/B197M - Standard Specification for Copper-Beryllium Alloy Wire ASTM B
21、455 - Standard Specification for Copper-Zinc-Lead Alloy (Leaded-Brass) Extruded Shapes. ASTM B488 - Gold for Engineering Uses, Electrodepositied Coatings of Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49142B w/AMENDMENT 1 5ASTM B700 - Ele
22、ctrodepositied Coatings of Silver for Engineering Use ASTM D2116 - FEP Fluorocarbon Molding and Extrusion Materials ASTM D4894 - Polytetrafluoroethylene (PTFE), Grandular Molding and Ram Extrusion Materials ASTM D4895 - Standard Specification for Polytetrafluoroethylene (PTFE), Resin Produced from D
23、espersion (Copies of these documents are available online at http:/www.astm.org or from the ASTM International, 100 Barr Harbor Drive, Conshohocken, PA 19428-2959.) AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) ANSI B46.1 - Surface Texture (Copies of these documents are available online at http:/www.
24、sae.org or from the American National Standards Institute, 25 West 43 Street, 4thFloor, New NY 10036.) ELECTRONIC INDUSTRIES ALLIANCE (EIA) EIA 364 - Electrical Connectors/Socket Test Procedures Including Environmental Classifications (Copies of these documents are available online at http:/www.eia.
25、org or from the Electronic Industries Alliance, Technology Strategy when an alternate method is used the qualifying activity must be notified prior to the performance of the test. The test methods described herein are proven methods and shall be the referee method in case of dispute. 4.6.1 Visual an
26、d mechanical examination. Connectors and associated fittings shall be examined to verify that the design, construction, physical dimensions, marking and workmanship are in accordance with the applicable requirements (see 3.1, 3.3, 3.4, 3.27, and 3.28). 4.6.1.1 Dimensional examination. Mating dimensi
27、ons shall be examined by mating the connector with its applicable mating gages or other suitable means acceptable to the Government. 4.6.2 Force to engage/disengage (see 3.5). 4.6.2.1 Bayonet and threaded types (see 3.5.1). The connector shall be engaged with its mating standard part (see 3.1). Duri
28、ng the entire coupling/uncoupling cycle (until the connector is fully engaged/disengaged) the forces and/or torques necessary shall not exceed those specified (see 3.1). A thread coupled connector is fully engaged with its mating standard part when their reference planes (see 3.1) coincide. A bayone
29、t coupled connector is fully engaged with its matting standard part when the bayonet studs have passed the detent and their reference planes coincide. No additional tightening torque shall be applied. The mating standard part is a steel jig containing the critical interface dimensions finished to th
30、e tolerances specified (see 3.1). As an option for this test, a qualified mating connector may be used in place of the standard steel jig with the approval of the qualifying agency (see 3.1). Its spring members when applicable shall be heat treated beryllium copper. The surface finish or mating surf
31、aces shall be 16 microinches maximum, in accordance with ANSI B46.1. 4.6.2.2 “Push-on” connector types (see 3.5.2). The connector under test shall be engaged with its standard mating part (gage). As an option for this test, a qualified mating connector may be used in place of the standard steel jig
32、with the approval of the qualifying agency. During this engaging cycle the force necessary to fully engage the connectors shall not exceed that specified (see 3.1). Upon completion of engagement, an opposite force necessary for disengagement shall be applied. This force shall be within the limits sp
33、ecified, and shall include any unlatching forces required. 4.6.3 Coupling proof torque (threaded types only) (see 3.6). The connector under test shall be engaged with its mating standard part (gage). As an option for this test, a qualified mating connector may be used in place of the standard steel
34、jig with the approval of the qualifying agency, and their reference planes (see 3.1) shall coincide. The coupling nut shall be tightened to the torque value specified (see 3.1). After 1 minute the connector under test and its mating standard past shall be disengaged. 4.6.4 Mating characteristics (se
35、e 3.7). After insertion of the specified oversize pin the specified number of times (see 3.1), the contact to be tested shall be held rigid by means of a suitable jig or fixture. As an option for this test, a qualified mating connector may be used in place of the standard steel jig with the approval
36、 of the qualifying agency. A gage containing the test pin or test ring and a suitable force indicating dial shall be aligned to within 0.004 total indicator reading (T.I.R) of any plane passing through the axis of the contact under test. Engagement or withdrawal of the test pin or test ring shall be
37、 made smoothly and at such a rate that the dial does not bounce or otherwise give a false reading. The test pin or test ring may be chamfered to facilitate entry, but the specified engagement length shall not include the chamfer length and the finish shall be as specified and in accordance with ANSI
38、 B46.1. 4.6.5 Permeability of nonmagnetic materials (see 3.8). The permeability of the connector shall be measured with an indicator conforming to ASTM A342/A342M. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49142B w/AMENDMENT 1 164.6.6 H
39、ermetic seal (pressurized connectors only) (see 3.9). Connectors shall be tested in accordance with method 112 of MIL-STD-202. The following details shall apply: a. Test condition letter: C. b. Procedure number: III. c. Leakage rate sensitivity: 108cubic centimeters (cm3) per second. 4.6.7 Leakage (
40、pressurized connectors only) (see 3.10). Connectors shall be subjected to air pressure specified (see 3.1), applied to one end, and the whole assembly immersed in water at a temperature of 15 to 25C. The connector shall remain immersed for at least 2 minutes. 4.6.8 Insulation resistance (see 3.11).
41、When applicable, (see 3.1), the connector shall be tested in accordance with test procedure 021 of EIA 364. The following details shall apply: Points of measurement: 1. Between center conductor anti intermediate conductor. 2. Between intermediate conductor and outer conductor and/or body. 4.6.9 Cond
42、uctor retention (captivated center conductor only (see 3.12). An axial force (see 3.1), shall be applied first in one direction and then the other, to the center contact of an assembled and uncabled connector utilizing a method and force measuring device suitable to the Government. The intermediate
43、conductor shall be inspected after the force has been applied in one direction and again after the force has been applied in the opposite direction to determine if the conductor has been displaced from the specified interface dimensions. 4.6.10 Salt spray (corrosion) (see 3.13). Unless otherwise spe
44、cified (see 3.1), unmated and uncabled connectors shall be tested in accordance with method 101 of MIL-STD-202. The following details shall apply: a. Test condition letter-B. b. Measurements after exposure: Connectors shall be washed, shaken, and lightly brushed, then permitted to dry for 24 hours a
45、t 40C. Connectors shall then be examined for evidence of corrosion, pitting, and shall be tested as specified in 4.6.2.1 or 4.6.2.2, as applicable. 4.6.11 Dielectric withstanding voltage (see 3.14). Connectors shall be tested in accordance with method 301 of MIL-STD-202. The following details shall
46、apply: a. Special preparations or conditions: 1. The maximum relative humidity shall be 50 percent. When facilities are not available at this test condition, connectors shall be tested at room ambient relative humidity. In case of dispute, if the test has been made at room ambient relative humidity,
47、 retest shall be made at 50 percent maximum relative humidity. 2. The center contact of the plug connectors and receptacle connectors shall be positioned in such a manner as to simulate actual assembly conditions. 3. Precaution shall be taken to prevent air-gap voltage breakdowns. 4. The voltage sha
48、ll be metered on the high side of the transformer. b. Magnitude of test voltage (see 3.1). The voltage shall be instantaneously applied. c. Nature of potential - Alternating current d. Points of application of test voltage: 1. Between the center conductor and intermediate conductor. 2. Between inter
49、mediate conductor and outer conductor. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49142B w/AMENDMENT 1 174.6.12 Vibration, high frequency (see 3.15). A complete assembly shall be tested in accordance with test procedure 028 of EIA 364, condition III. The measurements shall be by visual examination and shall be made as spec
