1、 REVISIONS LT DESCRIPTION DATE APPROVED A Revised drawing. 29 APR 98 D. Moore B Update and validation of drawing. Editorial changes throughout. 19 NOV 03 K. Cottongim C Add supersession data and tin prohibition paragraph. Editorial changes throughout. 9 NOV 05 W. Sindelar CURRENT DESIGN ACTIVITY CAG
2、E CODE 037Z3 DEFENSE LOGISTICS AGENCY DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO 43218-3990 Prepared in accordance with ASME Y14.100 Selected item drawing REV C C C C C PAGE 16 17 18 19 20 REV STATUS OF PAGES REV C C C C C C C C C C C C C C C PAGES 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 PMIC N/A PR
3、EPARED BY David Wood DESIGN ACTIVITY: DEFENSE ELECTRONIC SUPPLY CENTER DAYTON, OHIO 45444-5000 Original date of drawing 26 April 91 CHECKED BY David Wood TITLE RESISTOR, FIXED, FILM, PRECISION, 0.25 WATT, POWER CURVE C APPROVED BY David E. Moore SIZE A CODE IDENT. NO. 14933 DWG NO. 90038 REV C PAGE
4、1 OF 20 AMSC N/A 5905-E561 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. 90038 REV C PAGE 2 1. SCOPE 1.1 Scope. This drawing describes the requirements for a fixed, f
5、ilm, 0.25 watt, power curve C, precision resistor. 1.2 Part or Identifying Number (PIN). The complete PIN is as follows (see 3.3.5 and 6.4): 90038 A * V Y Drawing number Terminal finish (3.3.1) Resistance (3.3.2 and 3.3.3) Resistance tolerance (3.3.4) Temperature characteristic (3.3.6) 2. APPLICABLE
6、 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 specified, the issues of these documents are those cited in the solicitation or co
7、ntract. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-202 - Tests Methods For Electronic and Electrical Components Parts. MIL-STD-810 - Environmental Test Methods and Engineering Guidelines. MIL-STD-1276 - Leads for Electronic Components Parts. MIL-STD-1285 - Marking of Electrical and Electronic Parts. (C
8、opies 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 Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2 Non-Government publications. The following document form a part of
9、this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are those cited in the solicitation or contract. NATIONAL CONFERENCE OF STANDARDS LABORATORIES (NCSL) NCSL Z540.1 - Calibration Laboratory and Measuring and Test Equipment, General Requirement
10、s for. (Application for copies should be addressed to the National Conference of Standards Laboratories (NCSL) International, 1800 30thStreet, Suite 305, Boulder, CO 80301-1026.) 2.3 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, th
11、e 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 be as specified herein. 3.2 Interface and physical dime
12、nsions. Resistors shall meet the interface and physical dimensions as specified 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. 90038 REV C PAGE
13、3 Inches mm Inches mm .0020 .0250 .0620 .0625 .1250 0.050 0.640 1.580 1.588 3.180 .1610 .3750 .4750 .5000 1.5000 4.090 9.530 12.070 13.000 38.000 Notes: 1. Dimensions are in inches. 2. Metric equivalents are given for general information only. 3. The end of the body shall be the point at which the b
14、ody diameter equals the nearest drill size larger than 250 percent of the nominal lead diameter. 4. Maximum length is clean lead to clean lead. 5. Resistance measuring point shall be 0.5 inch .125 inch for resistance values of 10 ohms or more, and .0625 inch .025 inch for resistance values less than
15、 10 ohms. FIGURE 1. Fixed resistors, precision. 3.3 Electrical characteristics. 3.3.1 Termination finish. Termination material shall be in accordance with MIL-STD-1276 and table I. TABLE I. Termination finish 1/ Termination symbol Termination material in accordance with MIL-STD-1276. A B C32 Electro
16、plated tin lead terminals. C52 Hot solder dipped terminals. 1/ The maximum thickness of the hot solder dip coating as called out for C52 in MIL-STD-1276 shall not be applicable. 3.3.1.1 Pure tin. The use of pure, as an underplate or final finish is prohibited both internally and externally. Tin cont
17、ent of resistors 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). 3.3.2 Resistance range. The resistance range shall be from 10 ohms to 1.0 megohm. Provided by IHSNot for ResaleNo reproduction or networking permitted without l
18、icense from IHS-,-,-DEFENSE ELECTRONIC SUPPLY CENTER DAYTON, OHIO SIZE A CODE IDENT NO. 14933 DWG NO. 90038 REV C PAGE 4 3.3.3 Resistance. The nominal resistance expressed in ohms is identified by six characters, consisting of five digits and a letter. The letter is used simultaneously as a decimal
19、point and as a multiplier. For resistance values: a. Greater than or equal to 10 ohms but less than 1,000 ohms, the letter “R” is used to represent a decimal point. b. Greater than or equal to 1,000 ohms but less than 1 megohm, the letter “K” is used to represent a decimal point. c. Greater than or
20、equal to 1 megohm, the letter “M” is used to represent a decimal point. All digits preceding and following the letters (R, K, and M) of the group represent significant figures. Minimum and maximum resistance values shall be as specified herein. The standard values for every decade shall follow the s
21、equence specified in table II for resistance tolerances D and F. The resistance values for tolerances V, T, A, and B may be any value within the limits specified in 3.3.2, but it is preferred that values be chosen from the D column of table II. TABLE II. Standard resistance values for the 10 to 100
22、decade. Resistance tolerance (0.5) D (1.0) F (0.5) D (1.0) F (0.5) D (1.0) F (0.5) D (1.0) F (0.5) D (1.0) F (0.5) D (1.0) F 10.0 10.1 10.2 10.4 10.5 10.6 10.7 10.9 11.0 11.1 11.3 11.4 11.5 11.7 11.8 12.0 12.1 12.3 12.4 12.6 12.7 12.9 13.0 13.2 13.3 13.5 13.7 13.8 14.0 14.2 14.3 14.5 10.0 10.2 10.5
23、10.7 11.0 11.3 11.5 11.8 12.1 12.4 12.7 13.0 13.3 13.7 14.0 14.3 14.7 14.9 15.0 15.2 15.4 15.6 15.8 16.0 16.2 16.4 16.5 16.7 16.9 17.2 17.4 17.6 17.8 18.0 18.2 18.4 18.7 18.9 19.1 19.3 19.6 19.8 20.0 20.3 20.5 20.8 21.0 21.3 14.7 15.0 15.4 15.8 16.2 16.5 16.9 17.4 17.8 18.2 18.7 19.1 19.6 20.0 20.5
24、21.0 21.5 21.8 22.1 22.3 22.6 22.9 23.2 23.4 23.7 24.0 24.3 24.6 24.9 25.2 25.5 25.8 26.1 26.4 26.7 27.1 27.4 27.7 28.0 28.4 28.7 29.1 29.4 29.8 30.1 30.5 30.9 31.2 21.5 22.1 22.6 23.2 23.7 24.3 24.9 25.5 26.1 26.7 27.4 28.0 28.7 29.4 30.1 30.9 31.6 32.0 32.4 32.8 33.2 33.6 34.0 34.4 34.8 35.2 35.7
25、36.1 36.5 37.0 37.4 37.9 38.3 38.8 39.2 39.7 40.2 40.7 41.2 41.7 42.2 42.7 43.2 43.7 44.2 44.8 45.3 45.9 31.6 32.4 33.2 34.0 34.8 35.7 36.5 37.4 38.3 39.2 40.2 41.2 42.2 43.2 44.2 45.3 46.4 47.0 47.5 48.1 48.7 49.3 49.9 50.5 51.1 51.7 52.3 53.0 53.6 54.2 54.9 55.6 56.2 56.9 57.6 58.3 59.0 59.7 60.4
26、61.2 61.9 62.6 63.4 64.2 64.9 65.7 66.5 67.3 46.4 47.5 48.7 49.9 51.1 52.3 53.6 54.9 56.2 57.6 59.0 60.4 61.9 63.4 64.9 66.5 68.1 69.0 69.8 70.6 71.5 72.3 73.2 74.1 75.0 75.9 76.8 77.7 78.7 79.6 80.6 81.6 82.5 83.5 84.5 85.6 86.6 87.6 88.7 89.8 90.9 92.0 93.1 94.2 95.3 96.5 97.6 98.8 68.1 69.8 71.5
27、73.2 75.0 76.8 78.7 80.6 82.5 84.5 86.6 88.7 90.9 93.1 95.3 97.6 3.3.4 Resistance tolerance. Resistors are available in tolerances (V) .005 percent, (T) .01 percent, (A) .05 percent, (B) .1 percent, (D) .5 percent, and (F) 1.0 percent. Provided by IHSNot for ResaleNo reproduction or networking permi
28、tted without license from IHS-,-,-DEFENSE ELECTRONIC SUPPLY CENTER DAYTON, OHIO SIZE A CODE IDENT NO. 14933 DWG NO. 90038 REV C PAGE 5 3.3.5 Reactance. If circuit reactance is critical for your application, the contractor shall contact the manufacturer for the circuit reactance characteristics (see
29、6.4). 3.3.6 Temperature characteristics. Resistors are available with temperature coefficients codes Y, A, B, C, D, E, F, and G, as specified in table III. TABLE III. Characteristic. Resistance temperature characteristic (referenced to 25C) (ppm/C) Temperature C RTC -55 -15 +65 +125 +150 +175 code M
30、in Max Min Max Min Max Min Max Min Max Min Max Y A B C D E F G -0.0 -2.5 -5.0 -10.0 -2.5 -5.0 -10.0 0.7 5.0 2.5 5.0 10.0 2.5 5.0 10.0 3.7 -1.5 -2.5 -5.0 -10.0 -1.5 -2.5 -5.0 -0.7 3.5 2.5 5.0 10.0 1.5 2.5 5.0 2.3 -4.0 -2.5 -5.0 -10.0 -1.5 -2.5 -5.0 -2.8 1.0 2.5 5.0 10.0 1.5 2.5 5.0 0.2 -5.0 -2.5 -5.0
31、 -10.0 -2.5 -5.0 -10.0 -3.3 0.0 2.5 5.0 10.0 2.5 5.0 10.0 -0.3 -5.5 -3.5 -6.0 -12.0 -3.5 -6.0 -12.0 -4.1 -0.5 3.5 6.0 12.0 3.5 6.0 12.0 -1.1 -7.0 -4.5 -7.0 -15.0 -4.5 -7.0 -15.0 -4.5 -1.0 4.5 7.0 15.0 4.5 7.0 15.0 -1.5 3.4 Power rating. The power rating shall be 0.250 watt at +85C for power rating c
32、urve C. For operation at temperature in excess of +85C, derate in accordance with figure 2. NOTE: These curves indicate the percentage of nominal wattage to be applied at temperatures higher and lower than 85C for the same R that would occur at 85C during life testing. However, at no time shall the
33、applied voltage exceed the maximum voltage for each style. FIGURE 2. Derating curves for various ambient temperatures. 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. 9
34、0038 REV C PAGE 6 3.5 Voltage rating. The maximum continuous working voltage shall not exceed 200 volts. 3.6 Maximum weight. The maximum weight shall not exceed 0.00221 pound (1 gram). 3.7 Power conditioning. When resistors are tested as specified in 4.5, there shall be no evidence of mechanical dam
35、age; the change in resistance shall not exceed (.05 percent +.001 ohm) for power conditioning, thermal shock, and overload test combined (see 3.8 and 3.9). 3.8 Thermal shock. When resistors are tested as specified in 4.6, there shall be no evidence of mechanical damage; the change in resistance shal
36、l not exceed (.05 percent +.001 ohm) for power conditioning, thermal shock, and overload tests combined (see 3.7 and 3.9). 3.9 Overload. When resistors are tested as specified in 4.7, there shall be no evidence of arching, burning, or charring; the change in resistance shall not exceed (.05 percent
37、+.001 ohm) for power conditioning, thermal shock, and overload tests combined (see 3.7 and 3.8). 3.10 DC resistance. When resistors are tested as specified in 4.8, the dc resistance shall be within the specified tolerance of the nominal resistance (see 3.3.3) for all products deliverable on the cont
38、ract. 3.11 Hermetic seal (when applicable). For the purposes of this specification, a hermetically sealed resistor is one in which the resistive element is contained within a sealed enclosure of ceramic, glass, metal, or combinations thereof; where sealing is accomplished by material fusion, welding
39、, brazing, or soldering. When tested as specified in 4.9, the resistors supplied shall be capable of passing the seal tests, meeting a fine leak rate requirement of not more than 1 x 10-7atm cc/s, and a gross seal test showing no evidence of a continuous stream of bubbles emanating from the specimen
40、. 3.12 Solderability. When resistors are tested as specified in 4.10, they shall meet the criteria for wire-lead terminal evaluation in the test method. 3.13 Resistance to solvents. When resistors are tested as specified in 4.11, there shall be no evidence of mechanical damage and the markings shall
41、 remain legible. 3.14 Resistance temperature characteristic. When resistors are tested as specified in 4.12, the resistance temperature characteristic, at each of the temperatures specified in table VII, referred to 25C 5C shall not exceed the value specified in table III for the applicable characte
42、ristic. 3.15 Low temperature storage and operation. When resistors are tested as specified in 4.13, there shall be no evidence of mechanical damage. The change in resistance shall not exceed (0.01 percent +.001 ohm). 3.16 Terminal strength. When resistors are tested as specified in 4.14, there shall
43、 be no evidence of breaking or loosening of terminals from the resistor form, or chipping of coating, or other evidence of mechanical damage. The change in resistance shall not exceed (.01 percent +.001 ohm). 3.17 Dielectric withstanding voltage. When resistors are tested as specified in 4.15, there
44、 shall be no evidence of flashover, mechanical damage, arching, or insulation breakdown. The change in resistance shall not exceed (.01 percent +.001 ohm). 3.18 Insulation resistance. When resistors are tested as specified in 4.16, the insulation resistance shall be not less than 10,000 megohms. 3.1
45、9 Resistance to soldering heat. When resistors are tested as specified in 4.17, there shall be no evidence of mechanical damage. The change in resistance shall not exceed (.01 percent +.001 ohm). 3.20 Moisture resistance. When resistors are tested as specified in 4.18, there shall be no evidence of
46、mechanical damage. The change in resistance for nonhermetically sealed resistors shall not exceed (.05 percent +.001 ohm). For hermetically sealed resistors, the change in resistance shall not exceed (.01 percent +.001 ohm). In addition, the change in resistance due to dielectric withstanding voltag
47、e shall not exceed (.02 percent +.001 ohm), and the insulation resistance shall be 100 megohms minimum. 3.21 Shock (specified pulse). When resistors are tested as specified in 4.19, there shall be no evidence of mechanical or electrical damage. The change in resistance shall not exceed (.01 percent
48、+.001 ohm). There shall be no electrical discontinuity during the test. 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. 90038 REV C PAGE 7 3.22 Vibration, high frequenc
49、y. When resistors are tested as specified in 4.20, there shall be no evidence of mechanical damage. The change in resistance shall not exceed (.01 percent +.001 ohm). There shall be no electrical discontinuity during the test. 3.23 Life. When resistors are tested as specified in 4.21, there shall be no evidence of mechanical damage. The change i
