1、Comments, suggestions, or questions on this document should be addressed to Defense Supply Center, Columbus, ATTN: DSCC/VAT, Post Office Box 3990, Columbus, OH 43218 3990, or emailed to 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 MIL-PRF-94/3M w/Amendment 1 9 June 2008 SUPERSEDING MIL-PRF-94/3L 2 June 2006 PERFORMANCE SPECIFICATION SHEET RESISTORS, VARIABLE, COMPOSITION, STYLE RV6 This specification is approved for use by all Dep
3、artments and agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements for style RV6 composition, variable resistors. 1.2 Part or Identifying Number (PIN). Resistors covered by this specification are identified by a PIN which is in the following form. RV6
4、NAYSD101A Style Coded dash number The coded dash number is derived in accordance with MIL-PRF-94 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 sections of this
5、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, whether or not they
6、 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 solicitation (se
7、e 6.2). DEPARTMENT OF DEFENSE SPECIFICATION MIL-PRF-94 - Resistor, Variable, Composition, 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
8、nue, Building 4D, Philadelphia, PA 19111-5094). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-94/3M w/Amendment 1 22.3 Order of precedence. In event of a conflict between the text of this document and the references cited herein (except for
9、 related associated specifications, specification sheets, or MS sheets), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 General. The requirements for acquirin
10、g the product described herein shall consist of this document and MIL-PRF-94. 3.2 Interface and physical dimensions. The resistors shall meet the interface and physical dimensions specified in figure 1. FIGURE 1. Style RV6. Optional terminal configuration - loop terminals Provided by IHSNot for Resa
11、leNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-94/3M w/Amendment 1 3FIGURE 1. Style RV6 - Continued. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-94/3M w/Amendment 1 4Inches mm Inches mm Inches mm Inches mm
12、Inches mm 0.001 0.03 0.015 0.38 0.091 2.31 0.234 5.94 0.531 13.49 0.002 0.05 0.016 0.41 0.094 2.39 0.245 6.22 0.687 17.45 0.003 0.08 0.025 0.64 0.100 2.54 0.250 6.35 0.688 17.48 0.005 0.13 0.031 0.79 0.125 3.18 0.453 11.51 0.812 20.62 0.010 0.25 0.062 1.57 0.200 5.08 0.500 12.70 NOTES: 1. Dimensions
13、 are in inches. 2. Metric equivalents are given for general information. 3. Unless otherwise specified, tolerance is 0.016 inch (0.41mm). 4. When terminals are located symmetrically, the contact terminal shall be identified on the unit. The identifying mark shall be at the option of the supplier. 5.
14、 Terminals shall be numbered when using the optional location of the nonturn device. When using the shaft and panel sealed standard bushing with optional location of the nonturn device, the flatted shaft shall not be used. FIGURE 1. Style RV6 - Continued. 3.3 Nominal total resistance and rated conti
15、nuous working voltages. The nominal total resistance and rated continuous working voltage (RCWV) shall be as specified in table I. TABLE I. Nominal total resistance and rated continuous working voltage. RCWV 1/ (volts) RCWV 1/ (volts) Nominal total resistance (in ohms) Taper A Tapers C and F Nominal
16、 total resistance (in megohms) Taper A Tapers C and F 100 200 250 500 1,000 2,000 2,500 5,000 10,000 20,000 25,000 50,000 2/ 2/ 7 10 11 16 22 31 35 50 71 100 112 158 5 7 8 11 16 22 25 36 50 70 80 112 0.10 0.20 0.25 0.50 1.00 2.00 2.50 5.00 2/ 224 316 350 350 350 350 350 350 160 200 200 200 200 200 2
17、00 200 1/ Rated for continuous working voltage at 70OC. 2/ For replacement purposes only. Not for new design. 3.4 Minimum resistance. The maximum value of minimum resistance shall be 15 ohms for total resistance values of 100 ohms to 500 ohms inclusive. 3.45.1 Resistance value deviations. All maximu
18、m deviations as specified in this section are to be considered absolute limits with the exception of the contact resistance adjustments. 3.5 Shaft length. The length of the operating shaft shall be in accordance with table II. Provided by IHSNot for ResaleNo reproduction or networking permitted with
19、out license from IHS-,-,-MIL-PRF-94/3M w/Amendment 1 5TABLE II Shaft length. 1/ Length of shafts from mounting surface of resistors, (nominal) Flatted Slotted Symbol Bushings N and S (inches 0.313) Bushings N and S (inches 0.313) Bushings L and T (inches 0.313) A B D L 0.875 0.625 0.500 0.875 0.375
20、0.625 0.875 1/ For resistors with panel seals, the mounting surface shall be considered the metal face of the panel seal when the seal is firmly seated against the resistor body. 3.6 Mounting and locking nuts. The mounting nut shall be 0.078 inches thick and measure 0.313 inches across the hexagonal
21、 flats. The locking nut shall be 0.157 inches thick and shall measure 0.313 inches across the hexagonal flats. The thread size shall be 0.25-32 NEF-2B. 3.6.1 Internal tooth lockwasher. Internal tooth lockwasher of suitable size and when mounted, shall have a maximum thickness of 0.045 inches. 3.6.2
22、Retainer rings. If retainer rings are used, they shall have a maximum thickness of 0.032 inches. 3.7 Power rating. The power rating shall be 0.5 watts for taper A resistors and 0.25 watts for taper C and F. 3.8 Torque. 3.8.1 Operating torque. The torque required to effect rotation shall be 0.50 ounc
23、e-inch minimum and 6 ounce-inch maximum. 3.8.2 Stop torque. The torque applied to the operating shaft to the stops shall be 3 pound-inch. 3.8.3 Locking torque (as applicable). For the locking bushing type resistors, the locking nut shall be tightened with a torque of 8 pound-inches. After the lockin
24、g nut is tightened, the contact arm shall not move when a torque of 20 ounce-inches is applied to the shaft. 3.9 Total mechanical rotation. The total mechanical rotation without a switch shall be within the limits of 292 degrees and 298 degrees. 3.10 Thermal cycling. The resistance shall not change
25、in excess of 4 percent. 3.11 Pure tin. The use of pure tin, as an underplate 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 6.3). 4.
26、 VERIFICATION 4.1 Sampling and inspection. Sampling and inspection shall be in accordance with MIL-PRF-94. 4.2 Dielectric withstanding voltage. In the dielectric withstanding voltage test, the applied potential shall be 750 volts rms at a atmospheric pressure, and 350 volts rms at reduced barometric
27、 pressure. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-94/3M w/Amendment 1 65. 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 mater
28、iel is to be performed by DoD 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 Agen
29、cy, or within the military services 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 gener
30、al or explanatory nature that may be helpful, but is not mandatory.) 6.1 Intended use. The intended use specified in MIL-PRF-94 is applicable to this specification. 6.2 Acquisition requirements. Acquisition documents must specify the following: a. Title, number, and date of this specification, and t
31、he complete PIN (see 1.2). b. If not 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). 6.3 Tin whisker growth. The use of alloys with tin content greater than 97
32、percent, by mass, may exhibit tin whisker growth problems after manufacture. Tin whiskers may occur anytime from a day to years after manufacture and can develop under typical operating conditions, on products that use such materials. Conformal coatings applied over top of a whisker-prone surface wi
33、ll 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 information on this matter, refer to ASTM-B545 (Standard Specification for Electrodeposited Coatings of Tin). 6.4 Amendment notification. The margins of t
34、his 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 liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the requirem
35、ents 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 DLA - CC Navy - EC Air Force - 85DLA - CC Review activities (Project 5905-2008-047) Army - AR, AT, CR4, MI Navy - AS, MC, OS
36、 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-,-,-
