1、 REVISIONS LTR DESCRIPTION DATE APPROVED A Vendor requested changes to RTC and high temperature exposure 28 Aug 2007 M Radecki B Vendor recommended changes. Current DoD requirements. Editorial requirements throughout 15 Sept 2009 M. Radecki C Vendor address change. Editorial changes throughout. 13 S
2、ept 2012 M. Radecki Prepared in accordance with ASME Y14.100 Selected item drawing REV STATUS OF PAGES REV C C C C C C C C PAGES 1 2 3 4 5 6 7 8 PMIC N/A PREPARED BY Jesus V. Garcia III DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OH Original date of drawing 09 August 2007 CHECKED BY Andrew R. Ernst TI
3、TLE RESISTORS, FIXED, CURRENT SENSING, METAL STRIP, HIGH PRECISION, SURFACE MOUNT, STYLE 3637 APPROVED BY Michael A. Radecki SIZE A CODE IDENT. NO. 037Z3 DWG NO. 07012 REV C PAGE 1 OF 8 AMSC N/A 5905-2012-E08 CURRENT DESIGN ACTIVITY CAGE CODE 037Z3 HAS CHANGED NAMES TO: DLA LAND AND MARITIME COLUMBU
4、S, OHIO 43218-3990 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. 07012 REV C PAGE 2 1. SCOPE 1.1 Scope. This drawing describes the requirements for a metal strip, hi
5、gh precision, surface mount, current sensing, resistor, style 3637. 1.2 Part or Identifying Number (PIN). The complete PIN is as follows: 07012 - * * * Drawing number Resistance value (see 3.3.1) Tolerance (see 3.3.2) Resistance temperature characteristic (RTC) (see 3.3.3) 2. APPLICABLE DOCUMENTS 2.
6、1 Government documents. 2.1.1 Specifications and standards. 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 listed in the cited in the solicitation or contract (see
7、6.2). DEPARTMENT OF DEFENSE SPECIFICATION MIL-PRF-49465 - Resistors, Fixed, Metal Element (Power Type), Very Low Resistance Values, General Specification for DEPARTMENT OF DEFENSE STANDARDS MIL-STD-202 - Test Method Standard, Electronic and Electrical Component Parts (Copies of these documents are a
8、vailable 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 contract, in the event of a conflict between the text of this documen
9、t and the references cited herein (except for related specification sheets), the text of this document takes precedence unless otherwise noted. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Item requir
10、ements. The individual item requirements shall be as specified herein. 3.2 Interface and physical dimensions. The interface and physical dimensions shall be as specified in MIL-PRF-49465 and herein (see figure 1). Passivation is not applicable, however, a protective coating over the element shall be
11、 provided. 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. 07012 REV C PAGE 3 NOTES: 1. Dimensions are in Inches. Metric equivalents are given for general information
12、only. 2. Tolerance is 0.010 (0.25 mm), unless otherwise noted. 3. The pictorial view of the styles above is given as representative of the envelope of the item. Slight deviations from the outline shown, which are contained within the envelope and do not alter the functional aspects of the device, ar
13、e acceptable. FIGURE 1. Current sensing resistor. 3.3 Electrical characteristics 3.3.1 Resistance. The nominal resistance expressed in ohms is identified by five digits. The letter “R” is substituted for one of the significant digits to represent the decimal point. The succeeding digits of the group
14、 represent the significant figures specified in table I. TABLE I. Designation of resistance values. Designation Resistance ohms 0R0020 to 0R2000 incl. .002 to .200 Incl. Dimensions (mm) L W H T A B 0.360 (9.14) 0.370 (9.40) 0.025 (0.64) 0.086 (2.18) 0.061 (1.55) 0.032 (0.81) Provided by IHSNot for R
15、esaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO SIZE A CODE IDENT NO. 037Z3 DWG NO. 07012 REV C PAGE 4 3.3.1.1 Minimum and maximum resistance value. The minimum and maximum resistance values are as specified below. Minimum - .0
16、02 ohms Maximum - .200 ohms 3.3.2 Resistance tolerance. Resistors are available in resistance tolerances is as specified in table II. TABLE II. Resistance tolerance. Symbol Resistance tolerance (in percent) B 1/ C 1/ D F 0.1 0.25 0.5 1.0 1/ Inactive for new design 3.3.3 Resistance temperature charac
17、teristic. The resistance temperature characteristic is as specified in table III (see 4.4). TABLE III. Resistance temperature characteristic. Symbol Resistance range (in Ohms) Resistance temperature coefficient (RTC) (in ppm/OC) Blank 1/ .002 to .010 to .200 2 3.3.5 Current rating. The maximum curre
18、nt rating shall not exceed 38 Amps. 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. 07012 REV C PAGE 5 FIGURE 2. Derating curve. 3.3.6 Termination. The termination mat
19、erial shall Tin/Lead (see 3.3.6.1). 3.3.6.1 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 mas
20、s (see 6.3). 3.4 Thermal shock. When resistors are tested as specified in MIL-PRF-49465 for thermal shock the change in resistance shall not exceed 0.2 percent +0.0005 ohm. 3.5 Resistance temperature characteristic. When resistors are tested as specified in MIL-PRF-49465 the RTC shall not exceed the
21、 values specified in table III (see 3.3.3). 3.6 Low temperature storage. When resistors are tested as specified in MIL-PRF-49465 for low temperature operation the change in resistance shall not exceed 0.2 percent +0.0005 ohm. 3.7 Short time overload. When resistors are tested as specified in MIL-PRF
22、-49465 for short time overload the change in resistance shall not exceed 0.5 percent +0.0005 ohm. 3.8 Moisture resistance. When resistors are tested as specified in MIL-PRF-49465 for moisture resistance the change in resistance shall not exceed 0.1 percent +0.0005 ohm. 3.9 Shock, specified pulse. Wh
23、en resistors are tested as specified in MIL-PRF-49465 for shock the change in resistance shall not exceed 0.1percent +0.0005 ohm. 3.10 Vibration, high frequency. When resistors are tested as specified in MIL-PRF-49465 for vibration the change in resistance shall not exceed 0.1 percent +0.0005 ohm. 3
24、.11 Life. When resistors are tested as specified in MIL-PRF-49465 for life the change in resistance shall not exceed 0.5 percent +0.0005 ohm. 3.12 High temperature exposure. When resistors are tested as specified in MIL-PRF-49465 for high temperature exposure the change in resistance shall not excee
25、d 0.3 percent +0.0005 ohm (see 4.5). 100 80 60 40 20 0 -65 -50 -25 0 25 50 75 100 125 150 170 Percentofrated powerAmbient Temperature (OC) 70OC Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO SIZE A CODE
26、 IDENT NO. 037Z3 DWG NO. 07012 REV C PAGE 6 3.13 Marking. Marking is not required on this resistor; however, each waffle pack and each unit package shall be marked with the PIN assigned herein (see 1.2), the manufacturers identification code, the date code, and the lot code. At the option of the man
27、ufacturer, the resistor may be marked (i.e., laser, color dot, etc.). The marking shall remain legible after all tests. 3.14 Manufacturer eligibility. To be eligible for listing as an approved source of supply, a manufacturer shall be listed on the MIL-PRF-49465 Qualified Product List for at least o
28、ne part, or perform the group A and group B inspections specified herein on a sample of parts agreed upon by the manufacturer and DLA Land and Maritime-VA. 3.14.1 Certificate of compliance. A certificate of compliance shall be required from manufacturers requesting to be listed as approved sources o
29、f supply. 3.15 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 operational and maintenance requirements and promotes economically a
30、dvantageous life cycle costs. 3.16 Workmanship. Resistors shall be processed in such a manner as to be uniform in quality and be free from defects that will affect life, serviceability, or appearance. 4. VERIFICATION 4.1 Product assurance program. The product assurance program specified in MIL-PRF-4
31、9465 is not applicable to this document. 4.2 Qualification inspection. Qualification inspection is not applicable to this document. 4.3 Conformance inspection. 4.3.1 Inspection of product for delivery. Inspection of product for delivery shall consist of group A inspection and group B inspection of M
32、IL-PRF-49465. 4.3.1.1 Certification. The procuring activity may accept a certificate of compliance in lieu of Group B inspection. 4.4 Resistance temperature coefficient. Resistors shall be tested in accordance with method 304 of MIL-STD-202. The test temperature shall be in accordance with table IV.
33、 4.5 High temperature exposure (see 3.6) a. Mounting: Resistors shall be mounted on FR4 substrate. . Initial measurements: DC resistance shall be measured as specified in 4.8.2 of MIL-PRF-49465. c. Procedure: Following initial resistance measurements, resistors shall be placed in a chamber maintaine
34、d at +170OC 7OC for a period of 1000 hours 8 hours with no load applied. d. Measurements during test: 250 hours +48 hours, -0 hours. e. Final measurements: After removal from the test chamber, resistors shall be permitted to stabilize at room temperature and within 6 hours after removal, cleaning of
35、 the leads will be allowed and the dc resistance shall be measured as specified in 4.8.2 of MIL-PRF-49465. Resistors shall be examined for evidence of mechanical damage. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE SUPPLY CENTER, COLUMBUS
36、COLUMBUS, OHIO SIZE A CODE IDENT NO. 037Z3 DWG NO. 07012 REV C PAGE 7 TABLE IV. Resistance temperature characteristic test temperatures. Sequence Temperature OC 3OC (Group B) 1/ 1. -55 2. 25 2/ 3. 125 1/ At the option of the manufacturer, the reverse sequence may be as specified. 2/ This temperature
37、 shall be considered the reference temperature for each of the succeeding temperatures. 1. 125OC 3OC 2. 25OC 3OC 1/ 3. -55OC 3OC 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
38、 be performed by DoD or in-house contractor personnel, these personnel need to contact the responsible packaging activity to ascertain requisite packaging requirements. Packaging requirements are maintained by the Inventory Control Points packaging activity within the Military Department or Defense
39、Agency, or within the Military Departments Services System Command. 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 informa
40、tion of a general or explanatory nature that may be helpful, but is not mandatory.) 6.1 Intended use. Resistors are intended to be used in thick or thin film circuits where microcircuity is intended, also, for use in surface mounting application. 6.2 Ordering data. The contract or purchase order sho
41、uld specify the following: a. Complete PIN (see 1.2). b. Requirements for delivery: One copy of the conformance inspection data or a certificate of compliance that parts have passed conformance inspection with each shipment of parts by the manufacturer. c. Packaging requirements (see 5.1). (i.e. Ele
42、ctrostatic discharge sensitive packaging). d. Whether the manufacturer performs the group B tests or provides certificate of compliance with group B (see 4.3.1.1). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE SUPPLY CENTER, COLUMBUS COLUMB
43、US, OHIO SIZE A CODE IDENT NO. 037Z3 DWG NO. 07012 REV C PAGE 8 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
44、 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 information on
45、this matter, refer to ASTM-B545 (Standard Specification for Electrodeposited Coatings of Tin). 6.4 Tolerance caution. Soldering temperature used during installation may cause resistance to shift up to 2 percent 6.5 Users of record. Coordination of this document for future revisions is coordinated on
46、ly with the approved sources of supply and the users of record of this document. Requests to be added as a recorded user of this drawing may be achieved on-line at resistordla.mil or in writing to: DLA Land and Maritime, ATTN: VAT, P.O. Box 3990, Columbus, OH 43218-3990 or by telephone (614) 692-875
47、4 or DSN 850-8754. 6.6 Approved sources of supply. Approved sources of supply are listed herein. Additional sources will be added as they become available. Assistance in the use of this drawing may be obtained on on-line at resistordla.mil or contact DLA Land and Maritime, ATTN: VAT, P.O. Box 3990,
48、Columbus, OH 43218-3990, or by telephone (614) 692-8754 or DSN 850-8754. DLA Land and Maritime drawing PIN Vendor similar designation or type number 1/ Vendor CAGE Vendor name and address 07012-* 2/ 07012-*A CSM3637*B S8016 Vishay Precision Group, Inc. 3 Great Valley Parkway Suite 150 Malvern, PA 19355 Plants: Vishay Advanced Technologies, Ltd. 2 Haofan Street Holon 58125, Israel 1/ Parts must be purchased to the DLA Land and Maritime PIN to assure that all performance requirements and test are met. 2/ Inactive for new design. Provided by IHSNot for ResaleNo reproduction or networking
