DLA DESC-DWG-94048 REV G-2013 RESISTOR FIXED FILM CHIP (MELF) 1 2 WATT STYLE 2010.pdf

1、 REVISIONS LT DESCRIPTION DATE APPROVED A Changed PIN. Added additional tolerances. Editorial changes throughout. 16 NOV 94 N. Christolear B Update and validation of drawing. Editorial changes throughout. 3 APR 00 K. Cottongim C Add voltage rating. Change derating curve. Add group B certification. E

2、ditorial changes throughout. 5 FEB 01 K. Cottongim D Changes IAW NOR 5905-R006-02 paragraph 3.3.1, delete “table II” and substitute “3.3.1.1”. 16 JUL 02 K. Cottongim E Add requirements for termination finish (see 3.4); DoD policy corrections throughout. 12 DEC 02 K. Cottongim F Add pure tin, manufac

3、turer eligibility, and high power pulse paragraphs. Editorial changes throughout. 14 JAN 10 M. Radecki G Add new plant address. Editorial changes throughout. 17 JAN 13 M. Radecki CURRENT DESIGN ACTIVITY CAGE CODE 037Z3 HAS CHANGED NAMES TO: DLA LAND AND MARITIME COLUMBUS, OHIO 43218-3990 Prepared in

4、 accordance with ASME Y14.100 Source control drawing REV STATUS OF PAGES REV 1 2 3 4 5 6 7 PAGES G G G G G G G PMIC N/A PREPARED BY Andrew R. Ernst DESIGN ACTIVITY: DEFENSE ELECTRONIC SUPPLY CENTER DAYTON, OH 45444-5000 Original date of drawing 20 September 1994 CHECKED BY Andrew R. Ernst TITLE RESI

5、STOR, FIXED, FILM, CHIP (MELF), 1/2 WATT, STYLE 2010 APPROVED BY David E. Moore SIZE A CODE IDENT. NO. 14933 DWG NO. 94048 REV G PAGE 1 OF 7 AMSC N/A 5905-2013-E03 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE ELECTRONIC SUPPLY CENTER DAYTO

6、N, OHIO SIZE A CODE IDENT NO. 14933 DWG NO. 94048 REV G PAGE 2 1. SCOPE 1.1 Scope. This drawing describes the requirements for a fixed, film, chip resistor (MELF), style 2010. 1.2 Part or Identifying Number (PIN). The complete PIN is as follows: 94048 - * * | | | Drawing Number Resistance value (see

7、 3.3.1) Tolerance (see 3.3.2)2. APPLICABLE DOCUMENTS 2.1 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

8、 are those cited in the solicitation or contract. DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-PRF-55342 - Resistors, Chip, Fixed, Film, Nonestablished Reliability, Established Reliability, Space Level, General Specification for. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-690 - Failure Rate Sampling Plans

9、and Procedures. MIL-STD-790 - Standard Practice for Established Reliability and High Reliability Qualified Products 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

10、 online at https:/assist.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 otherwise noted herein or in the event of a conflict between the text of this document and the references cite

11、d 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 exemption has been obtained. 3. REQUIREMENTS 3.1 Item requirements. The individual item requirements shall b

12、e in accordance with MIL-PRF-55342 and as specified herein. 3.2 Interface and physical dimensions. The interface and physical dimensions shall be as specified herein (see figure 1). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE ELECTRONIC S

13、UPPLY CENTER DAYTON, OHIO SIZE A CODE IDENT NO. 14933 DWG NO. 94048 REV G PAGE 3 3.3 Electrical characteristics. 3.3.1 Resistance. The nominal resistance expressed in ohms is identified by four digits; the first three digits represent significant figures and the last digit specifies the number of ze

14、ros to follow. When the value of resistance is less than 100 ohms, or fractional values of an ohm are required, the letter “R“ shall be substituted for one of the significant figures. The resistance value designations are shown in table I. Minimum and maximum resistance values shall be as specified

15、in 3.3.1.1. Resistance values not listed in the “10 to 100” decade table of MIL-PRF-55342 for the appropriate resistance tolerance shall be considered nonconforming to the specification. Inches mm Inches mm Inches mm .006 0.15 .030 0.76 .200 5.08 .010 0.25 .079 2.01 NOTES: 1. Dimensions are in milli

16、meters. 2. Inch equivalents are given for general information only. FIGURE 1. Chip resistor. 3.3.1.1 Resistance range. Minimum and maximum resistance shall be from 0.1 to 1.6 kilohms. See table I. TABLE I. Resistance value designations. Designation Resistance ohms R100 to R976 inclusive 0.10 to 0.97

17、6 inclusive 1R00 to 9R76 inclusive 1.00 to 9.76 inclusive 10R0 to 97R6 inclusive 10.0 to 97.6 inclusive 1000 to 9760 inclusive 100 to 976 inclusive 1001 to 9761 inclusive 1,000 to 9,760 inclusive 1002 to 9762 inclusive 10,000 to 97,600 inclusive 1003 to 9763 inclusive 100,000 to 976,000 inclusive 10

18、04 to 9764 inclusive 1,000,000 to 9,760,000 inclusiveProvided 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. 94048 REV G PAGE 4 3.3.2 Resistance tolerance. The resistance toler

19、ances shall be in accordance with table II TABLE II. Resistance tolerance. Symbol Resistance tolerance percent F 1 G 2 J 5 3.3.3 Rated power. The rated power shall be 1/2 watt from -55OC to +70OC. For operation at temperatures higher than +70OC, derate in accordance with figure 2. 3.3.4 Temperature

20、range. The temperature range shall be -55OC to +150OC. FIGURE 2. Derating curve for high ambient temperatures. 3.3.5 Resistance temperature characteristic. The resistance temperature characteristic shall be 100 ppm/C. 3.3.6 Voltage rating. The working voltage shall not exceed 300 volts. 3.4 Terminat

21、ion material. Termination material shall be in accordance with MIL-PRF-55342, code letter B. 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, by mass. Tin shall

22、 be alloyed with a minimum of 3 percent lead, by mass (see 6.3). 3.6 Marking. Marking of the individual chip resistors is not required; however, each unit package shall be marked in accordance with MIL-STD-1285 and include the PIN as specified herein (see 1.2), the manufacturers name or Commercial a

23、nd Government Entity (CAGE) code, date, and lot codes. Percent of rated power100 80 60 40 20 0 -65 -50 -25 0 25 50 75 100 125 150 175 Ambient Temperature (OC) -55OC 70OC Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE ELECTRONIC SUPPLY CENTER

24、 DAYTON, OHIO SIZE A CODE IDENT NO. 14933 DWG NO. 94048 REV G PAGE 5 3.7 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 the operationa

25、l and maintenance requirements, and promotes economically advantageous life cycle costs. 3.8 Manufacturer eligibility. To be eligible for listing as a approved source of supply, a manufacturer shall be listed on the MIL-PRF-55342 Qualified Products List for at least one part, or perform the group A

26、and group B inspections specified herein on a sample agreed upon by the manufacturer and DLA Land and Maritime-VAT. 3.8.1 Certificate of compliance. A certificate of compliance shall be required from manufacturers requesting to be an approved source of supply. 3.9 Workmanship. Resistors shall be uni

27、form in quality and free from 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 provisions specified in MIL-PRF-55342 an

28、d maintained in accordance with MIL-STD-790 are not applicable to this document. 4.3 Product level qualification. The product level qualification specified in MIL-PRF-55342 and MIL-STD-690 is not applicable to this document. 4.4 Conformance inspection. 4.4.1 Inspection of product for delivery. Inspe

29、ction of product for delivery shall consist of group A (ER level) and group B inspections. 4.4.1.1 Group A inspection. Group A inspection (ER level) shall be in accordance with MIL-PRF-55342. PPM testing and verification as specified in MIL-PRF-55342 are not applicable to this document. 4.4.1.2 Grou

30、p B inspection. Group B inspection shall be in accordance with MIL-PRF-55342. 4.4.1.2.1 Certification. The acquiring activity, at its discretion, may accept a certificate of compliance with group B requirements in lieu of performing group B tests (see 6.2d). 4.4.1.3 Visual and mechanical inspection.

31、 Resistors shall be examined to verify that the materials, design, construction, physical dimensions, marking, and workmanship are in accordance with the applicable requirements 3.2, 3.6, and 3.9. 4.5 Inspection of packaging. Inspection of packaging shall be in accordance with MIL-PRF-55342. 5. PACK

32、AGING 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 packaging activity to ascertain p

33、ackaging requirements. Packaging requirements are maintained by the Inventory Control Points packaging activities within the Military Service or Defense Agency, or within the military services system commands. Packaging data retrieval is available from the managing Military Departments or Defense Ag

34、encys automated packaging files, CD-ROM products, or by contacting the responsible packaging activity. 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. 94048 REV G PAGE

35、6 6. NOTES (This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.) 6.1 Intended use. The chip resistors described herein are intended to be used in thick or thin film circuits where microcircuitry is intended; also for use in surface mounting

36、 applications. 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 conformance inspection with each shipment of parts

37、 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 4.4.1.2.1). 6.3 Tin whisker growth. The use of alloys with tin content greater than 97 percent, by mass, may

38、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 will not prevent the for

39、mation 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 Electrostatic charge. Under several combinations of conditions

40、, these resistors can be electrically damaged, by electrostatic charges, and drift from specified value. Users should consider this phenomena when ordering or shipping resistors. Direct shipment to the Government is controlled by MIL-DTL-39032 that specifies a preventive packaging procedure. 6.5 Pul

41、se applications. Designers are CAUTIONED on using the above resistors in high power pulse applications. Since they have not been qualified nor tested for such applications, damage and premature failure are possible. These resistors only see a one-time pulse (Short-time overload) as part of the group

42、 B inspection of MIL-PRF-55342. 6.6 User of record. 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

43、 in writing to: DLA Land and Maritime-VAT, Post Office Box 3990, Columbus, OH 43218-3990 or by telephone (614) 692-8754 or DSN 850-8754. 6.7 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

44、 drawing may be obtained online at resistordla.mil or contact DLA Land and Maritime-VAT, Post Office Box 3990, Columbus, OH 43218-3990 or by telephone (614) 692-8754 or DSN 850-8754. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE ELECTRONIC

45、SUPPLY CENTER DAYTON, OHIO SIZE A CODE IDENT NO. 14933 DWG NO. 94048 REV G PAGE 7 DLA Land and Maritime drawing PIN Vendors similar designation or type number 1/ Vendor CAGE Vendors name and address 94048-* MCHP-1/2 11502 TT Electronics/International Resistive Company, Inc. 4222 S. Staples Street Co

46、rpus Christi, TX 78411 SQQ65 Plant: BI Technologies S.A. DE C.V. Circulo De La Amistad No. 102, Pimsa IV 413 Rood Rd STE 7 Mexicali, Mexico 21210 1/ Parts must be purchased to the DLA Land and Maritime PIN to assure that all performance requirements and tests Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-