REVISIONS LTR DESCRIPTION DATE Prepared in accordance with ASME Y14.100 REV STATUS OF PAGES APPROVED Selected item drawing REV PAGES 1 2 3 4 5 6 PMIC N/A PREPARED BY Andrew R. Ernst DESIGN ACTIVITY: DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO Original date of drawing CHECKED BY Andrew R. Ernst 15 August 2006 APPROVED BY Michael A. Radecki TITLE RESISTOR, CHIP, FIXED, POWER METAL STRIP, SURFACE MOUNT, LOW VALUE (.25 WATT), STYLE 1206 SIZE A REV AMSC N/A CODE IDENT. NO. 037Z3 DWG NO. 06009 PAGE 1 OF 6 5905-E590 1. SCOPE 1.1 Scope. This drawing describes the requirements for a .126 X .063, .25 watt, fixed, power metal strip, surface mounted, chip resistor. 1.2 Part or Identifying Number (PIN). The complete PIN is as follows: 06009 I I Drawing number - ***** I I Resistance value (see 3.3.1, 3.3.2) * I I Tolerance (see 3.3.3) 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents in sections 3 and 4 of this specification, whether or not they are listed. 2.2 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 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 MIL-STD-790 - Failure Rate Sampling Plans and Procedures. Established Reliability and High Reliability Qualified Products List (QPL) Systems for Electrical, Electronic, and Fiber Optic Parts Specifications. (Copies 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.) 2.3 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, 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 be in accordance with MIL-PRF-55342, and as specified herein. 3.2 Interface and physical dimensions. Resistors shall meet the interface and physical dimensions as specified herein (see figure 1). DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO SIZE CODE IDENT NO. A 037Z3 REV DWG NO: 06009 PAGE 2 Dimensions L H T W 0.126 ±0.010 (3.20 ±0.254) 0.025 ±0.010 (0.635 ±0.254) 0.020 ±0.010 (0.508 ±0.254) 0.063 ±0.010 (1.60 ±0.254) NOTES: 1. Dimensions are in inches, millimeters are shown in parentheses. 2. Millimeter equivalents are given for general information only. FIGURE 1. Resistor, fixed, power metal strip, surface mount. 3.3 Electrical characteristics. 3.3.1 Resistance. The nominal resistance is expressed in ohms and is identified by five digits. The letter “R” is substituted for one of the significant digits to represent the decimal point. Standard resistance decade values shall be in accordance with table I. Table I. Standard resistance decade values. 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 Standard resistance decade values 30 40 50 60 70 80 31 41 51 61 71 81 32 42 52 62 72 82 33 43 53 63 73 83 34 44 54 64 74 84 35 45 55 65 75 85 36 46 56 66 76 86 37 47 57 67 77 87 38 48 58 68 78 88 39 49 59 69 79 89 DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO 90 91 92 93 94 95 96 97 98 99 SIZE CODE IDENT NO. A 037Z3 REV DWG NO: 06009 PAGE 3 3.3.2 Resistance range. The resistance range shall be 0.002 ohms to 0.2 ohm (see 6.5). 3.3.3 Resistance tolerance. Resistance tolerances are available in (D) ±0.5 percent and (F) ±1 percent (see 6.5). 3.3.4 Power rating. The power rating shall be .25 watt at +70°C. For operation at temperatures greater than +70°C, derate in accordance with figure 2. 3.3.5 Resistance temperature coefficient. The resistance temperature coefficient shall be as specified in table II. TABLE II. Resistance temperature coefficient. Resistance temperature coefficient (ppm/°C) ±275 ±150 ±110 ±75 Resistance range (Ohms) 0.002 to 0.0029 0.003 to 0.0049 0.005 to 0.0069 0.007 to 0.2 3.4 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 mass (see 6.3). FIGURE 2. Derating curves for high ambient temperatures. 3.5 Short time overload. When resistors are tested as specified in 4.5, there shall be no evidence of arcing, burning, or charring; the change in resistance between the initial and final measurements shall not exceed ± (0.5 percent+ 0.0005 ohm). 3.6 Moisture resistance. When resistors are tested as specified in 4.6, there shall be no evidence of mechanical damage; the change in resistance between the initial and final measurements shall not exceed ± (0.5 percent+ 0.0005 ohm). 3.7 Manufacturers performance data. The manufacturer’s technical specifications and performance data shall be made available to the customer for a period of two years. 3.8 Marking. Marking is not required on the resistor; however, each unit package shall be marked with the PIN assigned herein (see 1.2), vendor CAGE code, and date and lot codes. 3.8.1 Individual chip marking. Marking of individual chip resistors is not required but is permitted. Chip resistors may be marked in accordance with MIL-PRF-55342. The marking requirement and code system used shall be specified on the order. If no code system is specified, the manufacturer may select the code. Abbreviated markings are due to limited space takes precedence over PIN format. DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO SIZE CODE IDENT NO. A 037Z3 REV DWG NO: 06009 PAGE 4 3.9 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 advantageous life cycle costs. 3.10 Certificate of compliance. A certificate of compliance shall be required from manufacturers requesting to be a suggested source of supply. 3.11 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 program. The reliability assurance program specified in MIL-PRF-55342 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-55342 and MIL-STD-690 is not applicable to this document. 4.4 Conformance inspection. 4.4.1 Inspection of product for delivery. Inspection of product for delivery shall consist of group A inspection (ER level only, subgroup 2; dc resistance only, subgroup 5; the following exception shall apply: Resistors shall be inspected without addition of any coatings to the laser-marked surface area. Resistors shall be examined for legibility under normal production room lighting by an inspector at 10X magnification, and ppm reporting is not applicable) and group B inspection (solder mounting integrity is not applicable) of MIL-PRF-55342. Additionally; a power moisture resistance test as specified in 4.6 shall be performed. 4.4.2 Certification. The acquiring activity may accept a certificate of compliance instead of performing group B inspection and the power moisture resistance test. 4.5 Short time overload. Resistors shall be tested in accordance with MIL-PRF-55342. The following details and exceptions shall apply: a. An overload dc test potential which will result in 5 times the rated wattage. b. Test board may have copper lamination in excess of the 70 micrometers copper (2 oz.) thickness as described in MIL-PRF-55342. c. Separate resistors shall be used for short time overload and resistance temperature characteristic tests. 4.6 Moisture resistance. Resistors shall be tested in accordance with MIL-PRF-55342. The following details and exceptions shall apply: a. The test is to be performed on an annual basis. b. A 30 piece sample shall be used with 0 defects allowed. c. Step 7a shall not be applicable. 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 packaging activity to ascertain packaging requirements. Packaging requirements are maintained by the Inventory Control Point's packaging activity within the Military Department or Defense Agency, or within the military service’s system commands. Packaging data retrieval is available from the managing Military Department's or Defense Agency's automated packaging files, CD-ROM products, or by contacting the responsible packaging activity. DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO SIZE CODE IDENT NO. A 037Z3 REV DWG NO: 06009 PAGE 5 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 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 and one copy of the conformance inspection data or certification of compliance that parts have passed conformance inspection with each shipment of parts by the manufacturer. c. Requirements for packaging and packing. d. Whether the manufacturer performs the group B inspection and the moisture resistance test or provides a certificate of compliance (see 4.4.2). e. If marking is required (see 3.8.1). 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 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 this matter, refer to ASTM-B545 (Standard Specification for Electrodeposited Coatings of Tin). 6.4 User of record. Coordination of this document for future revisions is coordinated only with the suggested 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 [email protected] or in writing to: DSCC-VAT, Post Office Box 3990, Columbus, OH 43218-3990 or by telephone (614) 692-0552 or DSN 850-0552. 6.5 Suggested source of supply. Suggested 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 [email protected] or contact DSCC-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 06009 WSL-1206-ARO 91637 Vendor's name and address Vishay Dale Electronics PO Box 609 Columbus, NE 68602-0609 1/ Parts must be purchased to the DSCC PIN to assure that all performance requirements and tests are met. DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO SIZE CODE IDENT NO. A 037Z3 REV DWG NO: 06009 PAGE 6