1、Comments, suggestions, or questions on this document should be addressed to: Defense Supply Center, Columbus, ATTN: DSCC-VAT, Post Office Box 3990, Columbus, Ohio 43218-3990 or by email Resistordla.mil. Since contact information can change, you may want to verify the currency of this address informa
2、tion using the ASSIST Online database at http:/assist.daps.dla.mil/ . AMSC N/A FSC 5905 INCH-POUND ML-PRF-39035/2H 2 April 2008 SUPERSEDING MIL-PRF-39035/2G 12 February 1998 PERFORMANCE SPECIFICATION RESISTORS, VARIABLE, NONWIREWOUND (ADJUSTMENT TYPE, LEAD-SCREW ACTUATED), NONESTABLISHED RELIABILITY
3、, AND ESTABLISHED RELIABILITY STYLE RJR24 This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the product described herein shall consist of this specification sheet and MIL-PRF-39035. 1. SCOPE 1.1 Scope. This specificati
4、on covers the requirements for style RJR24, nonestablished reliability, and established reliability, adjustment type, lead-screw actuated, nonwirewound, variable resistors. This style is available in characteristic C, F, and H. 1.2 Part or Identifying Number (PIN). Resistors covered by this specific
5、ation is identified by a PIN which consists of a basis style of this specification and a coded number. The PIN is in the following form: RJR24 FP102M Specification style number Coded number 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of
6、 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 cautioned that they must meet all specifie
7、d 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 document to the extent specified herein. Unle
8、ss otherwise specified, the issues of these documents are those cited in the solicitation or contract (see 6.2). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-39035/2H 2DEPARTMENT OF DEFENSE SPECIFICATION MIL-PRF-39035 - Resistors, Variable
9、, Nonwirewound (Adjustment Type), Nonestablished Reliability, and Established Reliability, General Specification for (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 Ave
10、nue, Building 4D, Philadelphia, PA 19111-5094). 2.3 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), the text of this document takes precedence. Nothing in this document, however, supersedes a
11、pplicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 General. The requirements for acquiring the product described herein shall consist of this document and MIL-PRF-39035. 3.2 Interface and physical dimension requirement. Resistors shall be of the interfa
12、ce, and physical dimensions specified on figure 1. 3.3 Power rating. The power rating shall be 1/2 watt for all characteristics. 3.4 Terminals. Characteristics C, F, and H are available with L-, P-, W- and X- type terminals. 3.5 Nominal resistance value and maximum rated ac or dc working voltage. No
13、minal resistance values and maximum rated ac or dc working voltages shall be as specified in table I. 3.5.1 Resistance value deviations. All maximum deviations as specified in this section are to be considered absolute limits with the exception of the contact resistance adjustments. TABLE I. Nominal
14、 resistance value and maximum rated ac or dc working voltage. Nominal resistance value (in Ohms) Maximum rated ac or dc working voltage per characteristics C, F, and H Nominal resistance value (in Ohms) Maximum rated ac or dc working voltage per characteristics C, F, and H 10 2.23 20,000 100 20 3.1
15、25,000 111 50 5.0 50,000 158 100 7.0 200 10.0 megohms 500 15.8 0.10 223 1,000 22.3 0.20 300 2,000 31.6 0.25 300 5,000 50.0 0.50 300 10,000 70.7 1.00 300 3.6 Actual effective electrical travel. Actual effective electrical travel shall be 15 turns minimum, and 30 turns maximum. 3.7 Operating torque. O
16、perating torque shall be a maximum of 5 ounces-inches. 3.8 Maximum voltage. Maximum rated ac or dc working voltage shall be 300 volts. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-39035/2H 33.9 Pure tin. The use of pure tin, as an underpla
17、te or final finish, is prohibited both internally and externally. Tin content of resistor components and solder shall not exceed 97 percent, by mass. Tin shall be alloyed with a minimum of 3 percent lead, by mass (see 6.5). FIGURE 1. Style RJR24 resistors. Provided by IHSNot for ResaleNo reproductio
18、n or networking permitted without license from IHS-,-,-MIL-PRF-39035/2H 4Inches mm Inches mm Inches mm Inches mm Inches mm Inches mm Inches mm .006 0.15 .020 0.51 .030 0.76 .080 2.03 .135 3.43 .187 4.75 .419 10.64 .010 0.25 .024 0.61 .072 1.83 .100 2.54 .150 3.81 .300 7.62 .420 10.67 .015 0.38 .025
19、0.64 .075 1.91 .125 3.18 .170 4.32 .375 9.53 NOTES: 1. Dimensions are in inches. 2. Unless otherwise specified, tolerance is .005 (.13 mm). 3. Metric equivalents are given for general information only. 4. The picturization of the styles above are given as representative of the envelope of the item.
20、Slight deviations from the outline shown, which are contained within the envelope, and do not alter the functional aspects of the device are acceptable. 5. The entire slot of the actuating screw must be above the surface of the unit. 6. For types P, W, and X normal mounting means is by use of pins o
21、nly. 7. The three leads shall be insulated wire, AWG size 28 to 30, having a minimum length of 6.00 (152.4 mm); they shall be insulated with polytetrafluoroethylene, stripped .250 .062 (6.35 mm 1.57 mm) from the end and color coded 8. Design of standoff is optional. 9. For terminal types P, W, and X
22、, shorter lead lengths (.172 minimum) are available, and can be ordered though acquisition requirements (see 6.2c). FIGURE 1. Style RJR24 resistors - Continued. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-39035/2H 54. VERIFICATION 4.1 Sam
23、pling and inspection. Sampling and inspection shall be in accordance with MIL-PRF-39035. 4.2 Visual and mechanical inspection. Visual and mechanical inspection shall be in accordance with MIL-PRF-39035. 4.3 Dielectric withstanding voltage. The magnitude of test voltage shall be 900 volts for all cha
24、racteristics at atmospheric pressure, and 350 volts for all characteristics at reduced barometric pressure. 5. PACKAGING 5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or order (see 6.2). When packaging of materiel is to be performed by DoD
25、or in-house contractor personnel, these personnel need to contact the responsible packaging activity to ascertain packaging requirements. Packaging requirements are maintained by the Inventory Control Points packaging activity within the Military Service or Defense Agency, or within the military ser
26、vices system commands. Packaging data retrieval is available from the managing Military Departments or Defense Agencys automated packaging files, CD-ROM products, or by contacting the responsible packaging activity 6. NOTES (This section contains information of a general or explanatory nature that m
27、ay be helpful, but not mandatory.) 6.1 Intended use. The notes specified in MIL-PRF-39035 are applicable to this specification. 6.2 Acquisition requirements. Acquisition documents must specify the following: a. Title, number, and date of this specification, and the complete PIN (see 1.2). b. If not
28、otherwise specified (see 2.1), the versions of the individual documents referenced will be those in effect on the date of release of the solicitation. c. Packaging instructions (see 5.1). d. Terminal lead lengths requirements (shorter lead lengths can be specified in the purchase order). 6.3 Weight.
29、 The weight is .046 ounces (1.3 grams). 6.4 MIL-PRF-22097 substitution data. Resistors of this specification regardless of their failure rate designation are substitutes for resistors of the same resistance value, tolerance, terminal characteristic and resistance temperature characteristics specifie
30、d in the inactivated specifications MIL-PRF-22097/3 and MIL-PRF-22097/4. 6.5 Tin whisker growth. The use of alloys with tin content greater than 97 percent, by mass, may exhibit tin whisker growth problems after manufacture. Tin whiskers may occur anytime from a day to years after manufacture and ca
31、n develop under typical operating conditions, on products that use such materials. Conformal coatings applied over top of a whisker-prone surface will not prevent the formation of tin whiskers. Alloys of 3 percent lead, by mass, have shown to inhibit the growth of tin whiskers. For additional inform
32、ation on this matter, refer to ASTM-B545 (Standard Specification for Electrodeposited Coatings of Tin). 6.6 Environmentally preferable material. Environmentally preferable materials should be used to the maximum extent possible to meet the requirements of this specification. As of the dating of this
33、 document, the U.S. Environmentally Protection Agency (EPA) is focusing efforts on reducing 31 priority chemicals. The list of chemicals is available on their website at http:/www.epa.gov/epaoswer/hazwaste/minimize/chemlist.htm. Further information is available at the following EPA site: http:/www.e
34、pa.gov/epaoswer/hazwaste/minimize/. Included in the EPA list of 31 priority chemicals are cadmium, lead, and mercury. Use of the materials on the list should be minimized or eliminated unless needed to meet the requirements specified herein (see section 3). Provided by IHSNot for ResaleNo reproducti
35、on or networking permitted without license from IHS-,-,-MIL-PRF-39035/2H 66.6 Changes from previous issue. The margins of this specification are marked with vertical lines to indicate where changes from the previous issue were made. This was done as a convenience only and the Government assumes no l
36、iability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous issue. Custodians: Preparing activity: Army - CR D
37、LA - CC Navy - EC Air Force - 11 DLA - CC Review activities: (Project 5905-2008-038) Army - AR, AT, AV, CR4, MI Navy - AS, MC, OS Air Force - 19, 99 NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at http:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
