DLA DSCC-DWG-07002 REV C-2009 RESISTOR FIXED WIREWOUND SURFACE MOUNT POWER TYPE (3 WATT).pdf

1、 REVISIONS LT DESCRIPTION DATE APPROVED A Changes in accordance with NOR 5905-E640. 22 JAN 2007 M. Radecki B Paragraph 3.3.5, corrected wattage rating. 6 FEB 2008 M. Radecki C Paragraph 3.3.9, corrected ohmic adder. Editorial changes throughout. 5 May 2009 M. Radecki Prepared in accordance with AMSE

2、 Y14.100 Source control drawing REV STATUS REV C C C C C C OF PAGES PAGES 1 2 3 4 5 6 PMIC N/A PREPARED BY Andrew R. Ernst DESIGN ACTIVITY DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OH 43218-3990 Original date of drawing CHECKED BY Andrew R. Ernst TITLE RESISTOR, FIXED, WIREWOUND, SURFACE MOUNT, POWE

3、R TYPE (3 WATT) 30 October 2006 APPROVED BY Michael Radecki SIZE A CODE IDENT. NO. 14933 DWG NO. 07002 REV C PAGE 1 OF 6 AMSC N/A 5905-E701 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO SIZE A CODE IDE

4、NT NO. 037Z3 DWG NO: 07002 REV C PAGE 2 1. SCOPE 1.1 Scope. This drawing describes the requirements for a 3 watt, fixed, surface mounted, wirewound, power type resistor. 1.2 Part or Identifying Number (PIN). The complete PIN is as follows: 07002 * * * I I I I Drawing Resistance value Tolerance Encap

5、sulation number (see 3.3.1 and 3.3.2) (see 3.3.3) (see 3.3.4) 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specifi

6、ed, 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, Established Reliability, and Space Level, General Specification for. DEPARTMENT OF DEFENSE STA

7、NDARDS 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 Products List (QPL) Systems for Electrical, Electronic, and Fiber Optic Parts Specifications

8、. MIL-STD-1285 - Marking of Electrical and Electronic Parts. * (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) * 2.2 Order of precedence. Unless o

9、therwise noted herein or 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

10、 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 dimensions as specified in MIL-PRF-39007 and

11、 herein (see figure 1). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO SIZE A CODE IDENT NO. 037Z3 DWG NO: 07002 REV C PAGE 3 Dimensions A B C D E F G (17.23 .127) .678 .005 (17.53 .813) .690 .032 (2.54

12、 .254) .100 .010 (7.11 .381) .280 .015 (3.96 .127) .156 .005 (6.98 .127) .275 .005 (5.46 .127) .215 .005 NOTES: 1. Dimensions are in inches, millimeters are in parentheses. 2. Inch equivalents are given for general information only. FIGURE 1. Resistor, fixed, wirewound, surface mount. 3.3 Electrical

13、 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 8 kilohms. 3.3.3 Resistance tolerance. Resistance tolerances are available in (D) 0.5 percent (for values above 1 o

14、hm), (F) 1 percent, (H) 3 percent, and (J) 5 percent. 3.3.4 Encapsulation. The encapsulation shall be in accordance with table I. TABLE I. Encapsulation. Style Encapsulation A Thermoplastic 3.3.5 Power rating. The power rating shall be 3 watt at +70C. For operation at temperatures greater than +70C,

15、 derate in accordance with figure 2. 3.3.6 Resistance temperature coefficient. The resistance temperature coefficient shall be as follows: 0.1 ohm to 0.3 ohm-150 ppm/C 0.31 ohm to 0.99 ohm-90 ppm/C 1.0 ohm to 9.9 ohm-50 ppm/C 10 ohms and over -20 ppm/C 3.3.7 Thermal shock. When resistors are tested

16、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). 3.3.8 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

17、 exceed (0.5 percent +0.05 ohm). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO SIZE A CODE IDENT NO. 037Z3 DWG NO: 07002 REV C PAGE 4 FIGURE 2. Derating curves for high ambient temperatures. * 3.3.9 Ov

18、erload. When resistors are tested as specified in 4.8, there shall be no evidence of electrical or mechanical damage. The maximum change in resistance shall not exceed (0.2 percent + 0.05 ohm). 3.3.10 Solderability. The total surface area of the dipped part of the termination is at least 95 percent

19、covered by a continuous new solder coating. Pin holes, voids, porosity, nonwetting, or dewetting shall not be 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 with

20、in .3125 inch (7.938 mm) of the bottom contact point of the “J“ bend. In case of a dispute, the percentage of coverage with pinholes or voids shall be determined by actual measurement of these areas, as compared to the total area. 3.3.11 High temperature exposure. When resistors are tested as specif

21、ied 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. Marking shall be as shown: 07002 (DSCC drawing number) 1R00FA (resistance value, tolerance, and encapsulation) XXXXX (CAGE code) 3.5 Pure tin. The use

22、 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). 3.6 Recycled, recovered, or environmentally prefe

23、rable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. * 3.7 Manufacturer eligibilit

24、y. To be eligible for listing as a approved source of supply, a manufacturer shall be listed on the MIL-PRF-39007 Qualified Products List for at least one part, or perform the group A and group B inspections specified herein on a sample agreed upon by the manufacturer and DSCC-VA. * 3.7.1 Certificat

25、e of compliance. A certificate of compliance shall be required from manufacturers requesting to be an approved source of supply. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO SIZE A CODE IDENT NO. 037Z

26、3 DWG NO: 07002 REV C PAGE 5 3.8 Workmanship. The resistor shall be uniform in quality 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

27、program. The reliability assurance program specified in MIL-PRF-39007 and maintained 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 Confor

28、mance inspection. Conformance inspection shall consist of group A (ER level) and group 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 lie

29、u of performing group B tests (see 6.2d). 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 accordance with MIL-PRF-39007 and the following exception shall apply: Mounting of test samples shall be on surfac

30、e 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: Mounting of test samples shall be on surface mount test cards, and 1,000 hours at maximum load at +25C. 4.8 Overlo

31、ad. 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 testing will be performed at 5 times rated power for 5 seconds. 4.9 Solderability. Solderability shall be in accordance

32、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 temperature, to the minimum depth necessary to cover the surface to be tested. The terminations shall be completely immerse

33、d 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 shall be skimmed from the surface of the molten solder (may not require separate operation in wave or flow pot). T

34、he 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 part shall be attached to a dipping device and the flux-covered terminations immersed in molten solder to the dept

35、h, 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 suitable solvent. If necessary, a soft cloth or cotton swab moistened with clean 91 percent isopropyl alcohol shall re

36、move 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 between 10X and 20X. 4.10 High temperature exposure. Resistors shall be tested in accordance with MIL-PRF-39007 and

37、 the following exception shall apply: Mounting of test samples shall be on surface mount test cards, and 250 hours at +125C. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO SIZE A CODE IDENT NO. 037Z3 DW

38、G NO: 07002 REV C PAGE 6 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 or in-house contractor personnel, these personnel need to contact the responsible p

39、ackaging activity to ascertain packaging requirements. Packaging requirements are maintained 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 M

40、ilitary 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 may be helpful, but is not mandatory.) 6.1 Intended use. Surface mount resistors

41、 are used in electronic circuits where space is a major concern. 6.2 Ordering data. The contract or purchase order should specify the following: a. Complete PIN (see 1.2). b. Requirements for delivery: One copy of the conformance inspection data or certification of compliance that parts have passed

42、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 certification of compliance with group B requirements (see 4.4.1). 6.3 Tin whisker growth. The use of alloys with tin

43、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 operating conditions, on products that use such materials. Conformal coatings applied over top of a

44、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 to ASTM-B545 (Standard Specification for Electrodeposited Coatings of Tin). * 6.4 User of record

45、. Coordination of this document for future revisions is coordinated only with the approved source of supply and the users of record of this document. Requests to be added as a recorded user of this drawing may be achieved online at resistordla.mil or in writing to: DSCC-VAT, Post Office Box 3990, Co

46、lumbus, OH 43218-3990 or by telephone (614) 692-0552 or DSN 850-0552. * 6.5 Approved source of supply. Approved source of supply is listed herein. Additional sources will be added as they become available. Assistance in the use of this drawing may be obtained online at resistordla.mil or contact DSC

47、C-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 07002* WSC6927 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-,-,-