1、 REVISIONS LT DESCRIPTION DATE APPROVED A Changes in accordance with NOR 5905-R013-95. 21 Oct 1994 D. Moore B Changes in accordance with NOR 5905-R017-95. 30 Oct 1995 D. Moore C Changes to paragraphs 3.3.2, 3.3.3, 3.3.10, and 4.8. Deleted paragraph 3.3.6 Voltage rating. Editorial changes throughout.
2、 8 Jul 1997 D. Moore D Changes in accordance with NOR 5905-R001-98. 3 Apr 1998 D. Moore E Update and validation of drawing. Editorial changes throughout. 3 Dec 2003 K. Cottongim F Add pure tin prohibition paragraph. Editorial changes throughout. 30 Oct 2006 M. Radecki CURRENT DESIGN ACTIVITY CAGE CO
3、DE 037Z3 DEFENSE LOGISTICS AGENCY DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO 43218-3990 Prepared in accordance with AMSE Y14.100 Selected item drawing REV STATUS REV F F F F F F OF PAGES PAGES 1 2 3 4 5 6 PMIC N/A PREPARED BY HERALDINE JOHNSON DEDIGN ACTIVITY: DEFENSE ELECTRONIC SUPPLY CENTER DA
4、YTON, OHIO 45444-5000 Original date of drawing CHECKED BY ANDREW ERNST TITLE RESISTOR, FIXED, WIREWOUND, SURFACE MOUNT, POWER TYPE (1/2 WATT) 11 July 1994 APPROVED BY DAVID E. MOORE SIZE A CODE IDENT. NO. 14933 DWG NO. 93075 REV F PAGE 1 OF 6 AMSC N/A 5905-E629 Provided by IHSNot for ResaleNo reprod
5、uction or networking permitted without license from IHS-,-,-DEFENSE ELECTRONIC SUPPLY CENTER DAYTON, OHIO SIZE A CODE IDENT NO. 14933 DWG NO: 93075 REV F PAGE 2 1. SCOPE 1.1 Scope. This drawing describes the requirements for a 1/2 watt, fixed, surface mounted, wirewound, power type resistor. 1.2 Par
6、t or Identifying Number (PIN). The complete PIN is as follows: 93075 * * I I I Drawing Resistance value Tolerance number (see 3.3.1, 3.3.2) (see 3.3.3) 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and handb
7、ooks 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. DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-PRF-39007 - Resistors, Fixed, Wirewound (Power Type), Nonestablished Reliability, Esta
8、blished Reliability, and Space Level, General Specification for. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-202 - Test Methods for Electronic and Electrical Component Parts. MIL-STD-690 - Failure Rate Sampling Plans and Procedures. MIL-STD-790 - Established Reliability and High Reliability Qualified Pr
9、oducts List (QPL) Systems for Electrical, Electronic, and Fiber Optic Parts Specifications. MIL-STD-1285 - 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 D
10、ocument Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicab
11、le laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Item requirements. The individual item requirements shall be in accordance with MIL-PRF-39007 and as specified herein. 3.2 Interface and physical dimensions. Resistors shall meet the interface and physical dim
12、ensions as specified in MIL-PRF-39007 and herein (see figure 1). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE ELECTRONIC SUPPLY CENTER DAYTON, OHIO SIZE A CODE IDENT NO. 14933 DWG NO: 93075 REV F PAGE 3 Dimensions A B C D E F G (4.77 .127)
13、 .188 .005 (5.08 .508) .200 .020 (1.02 .254) .040 .010 (2.44 .381) .096 .015 (2.29 .127) .090 .005 (3.18 .127) .125 .005 (1.27 .254) .050 .010 NOTES: 1. Dimensions are in inches, millimeters are in parentheses. 2. Inch equivalents are given for general information only. FIGURE 1. Resistor, fixed, wi
14、rewound, surface mount. 3.3 Electrical characteristics. 3.3.1 Resistance value designation. Resistance value designations shall be in accordance with MIL-PRF-39007. 3.3.2 Resistance. The resistance range shall be .1 ohm to 4.99 kilohms. 3.3.3 Resistance tolerance. Resistance tolerances are available
15、 in (D) 0.5 percent (for values above 1 ohm), (F) 1 percent, (H) 3 percent, and (J) 5 percent. 3.3.4 Power rating. The power rating shall be 1/2 watt at +70C. For operation at temperatures greater than +70C, derate in accordance with figure 2. 3.3.5 Resistance temperature coefficient. The resistance
16、 temperature coefficient shall be as follows: 0.1 ohm to 0.99 ohm-90 ppm/C 1.0 ohm to 9.9 ohm-50 ppm/C 3.3.6 Thermal shock. When resistors are tested as specified in 4.6, there shall be no evidence of mechanical damage. The maximum change in resistance shall not exceed (0.2 percent +0.05 ohm). 3.3.7
17、 Load life. When resistors are tested as specified in 4.7, there shall be no evidence of mechanical damage. The maximum change in resistance shall not exceed (0.5 percent +0.05 ohm). 3.3.8 Overload. When resistors are tested as specified in 4.8, there shall be no evidence of electrical or mechanical
18、 damage. The maximum change in resistance shall not exceed (0.2 percent + 0.005 ohm). 3.3.9 Solderability. The total surface area of the dipped part of the termination is at least 95 percent covered by a continuous new solder coating. Pin holes, voids, porosity, nonwetting, or dewetting shall not be
19、 concentrated in one area and shall not exceed 5 percent of the total termination area. The area of the surface to be tested shall include the total metallized areas of both terminations within .3125 inch (7.938 mm) of the bottom contact point of the “J“ bend. In case of a dispute, the percentage of
20、 coverage with pinholes or voids shall be determined by actual measurement of these areas, as compared to the total area. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE ELECTRONIC SUPPLY CENTER DAYTON, OHIO SIZE A CODE IDENT NO. 14933 DWG NO
21、: 93075 REV F PAGE 4 FIGURE 2. Derating curves for high ambient temperatures. 3.3.10 High temperature exposure. When resistors are tested as specified in 4.10, there shall be no evidence of mechanical damage. The maximum change in resistance shall not exceed (0.5 percent +0.05 ohm). 3.4 Marking. Mar
22、king shall be as shown: 93075 (DSCC drawing number) 1R00F (resistance value, and tolerance) XXXXX (CAGE code) 3.5 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, b
23、y mass. Tin shall be alloyed with a minimum of 3 percent lead, by mass (see 6.3). 3.6 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible provided that the material meets or exceeds t
24、he operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.7 Certificate of compliance. A certificate of compliance shall be required from manufacturers requesting to be a suggested source of supply. 3.8 Workmanship. The resistor shall be uniform in quali
25、ty and free from any defects that will affect life, serviceability, or appearance. 4. VERIFICATION 4.1 Qualification inspection. Qualification inspection is not applicable to this document. 4.2 Reliability assurance program. The reliability assurance program specified in MIL-PRF-39007 and maintained
26、 in accordance with MIL-STD-790 is not applicable to this document. 4.3 Failure rate qualification. Failure rate qualification specified in MIL-PRF-39007 and MIL-STD-690 is not applicable to this document. 4.4 Conformance inspection. Conformance inspection shall consist of group A (ER level) and gro
27、up B inspections of MIL-PRF-39007. Group A, subgroup 1 conditioning will not be performed. 4.4.1 Certification. The activity, at its discretion, may accept a certificate of compliance with group B requirements in lieu of performing group B tests (see 6.2d). Provided by IHSNot for ResaleNo reproducti
28、on or networking permitted without license from IHS-,-,-DEFENSE ELECTRONIC SUPPLY CENTER DAYTON, OHIO SIZE A CODE IDENT NO. 14933 DWG NO: 93075 REV F PAGE 5 4.5 Inspection of packaging. Inspection of packaging shall be in accordance with MIL-PRF-39007. 4.6 Thermal shock. Resistors shall be tested in
29、 accordance with MIL-PRF-39007 and the following exception shall apply: Mounting of test samples shall be on surface mount test cards, and Method 107 of MIL-STD-202, test condition B-3. 4.7 Load life. Resistors shall be tested in accordance with MIL-PRF-39007 and the following exception shall apply:
30、 Mounting of test samples shall be on surface mount test cards, and 1,000 hours at maximum load at +25C. 4.8 Overload. Resistors shall be tested in accordance with MIL-PRF-39007 and the following exception shall apply: Mounting of test samples shall be on surface mount test cards, and Overload testi
31、ng will be performed at 5 times rated power for 5 seconds. 4.9 Solderability. Solderability shall be in accordance with method 208 of MIL-STD-202 and the following details shall apply: a. Application of flux: Type R shall be used. Terminations shall be immersed in the flux, which is at room temperat
32、ure, to the minimum depth necessary to cover the surface to be tested. The terminations shall be completely immersed by individually dipping each termination. The terminations to be tested shall be immersed in the flux for a period of 5 seconds to 10 seconds. b. Solder dip: The dross and burned flux
33、 shall be skimmed from the surface of the molten solder (may not require separate operation in wave or flow pot). The molten solder shall be maintained at a uniform temperature of +245C 5C. The surface of the molten solder shall be skimmed again prior to immersing the terminations in the solder. The
34、 part shall be attached to a dipping device and the flux-covered terminations immersed in molten solder to the depth, and in the same manner specified in 4.9a. After the dipping process, the part shall be allowed to cool in air. Residue flux shall be removed from the terminations by rinsing in a sui
35、table solvent. If necessary, a soft cloth or cotton swab moistened with clean 91 percent isopropyl alcohol shall remove all remaining flux. c. Examination of terminations: After each dip-coated termination has been thoroughly cleaned of flux, the terminations shall be examined under a magnification
36、between 10X and 20X. 4.10 High temperature exposure. Resistors shall be tested in accordance with MIL-PRF-39007 and the following exception shall apply: Mounting of test samples shall be on surface mount test cards, and 250 hours at +125C. 5. PACKAGING 5.1 Packaging. For acquisition purposes, the pa
37、ckaging requirements shall be as specified in the contract or order (see 6.2). When packaging of materiel 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 mai
38、ntained by the Inventory Control Points packaging activity within the Military Department or Defense Agency, 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
39、 by contacting the responsible packaging activity. 6. NOTES (This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.) 6.1 Intended use. Surface mount resistors are used in electronic circuits where space is a major concern. Provided by IHSNot f
40、or ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE ELECTRONIC SUPPLY CENTER DAYTON, OHIO SIZE A CODE IDENT NO. 14933 DWG NO: 93075 REV F PAGE 6 6.2 Ordering data. The contract or purchase order should specify the following: a. Complete PIN. b. Requirements for deli
41、very and one copy of the conformance inspection data or certification of compliance that parts have passed conformance inspection with each shipment of parts by the manufacturer. c. Requirements for packaging and packing. d. Whether the manufacturer performs the group B tests or provides certificati
42、on of compliance with group B requirements. 6.3 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 can develop under typical opera
43、ting 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 information on this matter, refer t
44、o ASTM-B545 (Standard Specification for Electrodeposited Coatings of Tin). 6.4 User of record. Coordination of this document for future revisions is coordinated only with the suggested source of supply and the users of record of this document. Requests to be added as a recorded user of this drawing
45、may be achieved online at resistordla.mil or in writing to: DSCC-VAT, Post Office Box 3990, Columbus, OH 43218-3990 or by telephone (614) 692-0552 or DSN 850-0552. 6.5 Suggested source of supply. Suggested source of supply is listed herein. Additional sources will be added as they become available.
46、Assistance in the use of this drawing may be obtained online at resistordla.mil or contact DSCC-VAT, Post Office Box 3990, Columbus, OH 43218-3990 or by telephone (614) 692-0552 or DSN 850-0552. DSCC drawing PIN Vendors similar designation or type number 1/ Vendor CAGE Vendors name and address 93075
47、 WSC 1/2 91637 Dale Electronics, Inc. P.O. Box 609 Columbus, NE 68601-0609 Plant: Electronica Dale de Mexico, S.A. de C.V. Insurgentes 606 PT. CD., Juarez, Chihuahua MEXICO 1/ Parts must be purchased to the DSCC PIN to assure that all performance requirements and tests are met. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
