DLA DSCC-DWG-93076 REV J-2010 RESISTOR FIXED WIREWOUND SURFACE MOUNT POWER TYPE (1 WATT).pdf
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1、 REVISIONS LTR DESCRIPTION DATE APPROVED A Changes in accordance with NOR 5905-R012-95. 21 Oct 1994 D. Moore B Changes in accordance with NOR 5905-R018-95 30 Oct 1995 D. Moore C 3.3.10, Overload: When resistors are tested as specified in 4.8, there shall be no evidence of mechanical damage. The maxi
2、mum change in resistance shall not exceed (.2 percent +.05 ohm). 9 Apr 1996 D. Moore D 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. 8 Jul 1997 D. Moore E Changes in accordance with NOR 5905-R002-98. 3 Apr 1998 D. Moore F U
3、pdate and validation of drawing. Editorial changes throughout. 3 Dec 2003 K. Cottongim G Add thermoplastic encapsulation. Add pure tin prohibition paragraph. Editorial changes throughout. 30 Oct 2006 M. Radecki H Changes in accordance with NOR 5905-E639. 12 Dec 2006 M. Radecki J The epoxy encapsulat
4、ion is obsolete and is superseded by thermoplastic encapsulation with lead frame. Editorial changes throughout. 14 Apr 2010 M. Radecki Epoxy encapsulation is obsolete and is superseded by thermoplastic encapsulation with lead frame. CURRENT DESIGN ACTIVITY CAGE CODE 037Z3 DEFENSE LOGISTICS AGENCY DE
5、FENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO 43218-3990 Prepared in accordance with AMSE Y14.100 Source control drawing REV STATUS REV J J J J J J OF PAGES PAGES 1 2 3 4 5 6 PMIC N/A PREPARED BY HERALDINE JOHNSON DEDIGN ACTIVITY: DEFENSE ELECTRONIC SUPPLY CENTER DAYTON, OHIO 45444-5000 Original date
6、 of drawing 11 July 1994 CHECKED BY ANDREW ERNST TITLE RESISTOR, FIXED, WIREWOUND, SURFACE MOUNT, POWER TYPE (1 WATT) APPROVED BY DAVID E. MOORE SIZE A CODE IDENT. NO. 14933 DWG NO. 93076 REV J PAGE 1 OF 6 AMSC N/A 5905-E736 Provided by IHSNot for ResaleNo reproduction or networking permitted withou
7、t license from IHS-,-,-DEFENSE ELECTRONIC SUPPLY CENTER DAYTON, OHIO SIZE A CODE IDENT NO. 14933 DWG NO: 93076 REV J PAGE 2 1. SCOPE 1.1 Scope. This drawing describes the requirements for a 1 watt, fixed, surface mounted, wirewound, power type resistor. 1.2 Part or Identifying Number (PIN). The comp
8、lete PIN is as follows: 93076 * * * I I I I I I I I Drawing Resistance value Tolerance Encapsulation number (see 3.3.1, 3.3.2) (see 3.3.3) style (see 3.3.4) 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and
9、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 contract. DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-PRF-39007 - Resistors, Fixed, Wirewound (Power Type), Nonestablished Reliability,
10、 Established 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 Qualifi
11、ed 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 online at https:/assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 70
12、0 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 cited herein (except for related specification sheets), the text of this document takes precedence.
13、 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 in accordance with MIL-PRF-39007 and as specified herein. 3.2 Interface and physical dimensio
14、ns. Resistors shall meet the interface and physical dimensions as specified in MIL-PRF-39007 and herein (see figure 1). 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
15、shall be .1 ohm to 2.5 kilohms. 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: 93076 REV J PAGE 3 Dimensions A B C D E F G (6.05 .127) .238 .005 (6.35 .508) .250 .020
16、(1.14 .254) .045 .010 (2.79 .381) .110 .015 (2.64 .127) .104 .005 (3.81 .127) .150 .005 (2.49 .127) .098 .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. 3.3.3 Res
17、istance tolerance. Resistance tolerances are available in (D) 0.5 percent (for values above 1 ohm), (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 (blank) A Thermoplastic with
18、lead frame Thermoplastic with swaged lead 3.3.5 Power rating. The power rating shall be 1 watt at +70C. For operation at temperatures greater than +70C, derate in accordance with figure 2. * 3.3.6 Resistance temperature coefficient. The resistance temperature coefficient shall be as follows: Style (
19、blank) encapsulation Style A encapsulation 0.1 ohm to 0.99 ohm-90 ppm/C 0.1 ohm to 0.3 ohm-150 ppm/C 1.0 ohm to 9.9 ohm-50 ppm/C 0.31 ohm to 0.99 ohm-90 ppm/C 10 ohms and over -20 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 as specified
20、 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 exceed (0.5
21、 percent +0.05 ohm). 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: 93076 REV J PAGE 4 * FIGURE 2. Derating curves for high ambient temperatures. 3.3.9 Overload. When
22、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 + 0.005 ohm). 3.3.10 Solderability. The total surface area of the dipped part of the termination is at least 95 percent covered by a
23、 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 metalized areas of both terminations within .3125 inch
24、 (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 specified in 4.10,
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