1、 REVISIONS LTR DESCRIPTION DATE APPROVED A 5 year review cycle. Editorial changes throughout 10 Mar 06 M. Radecki Prepared in accordance with ASME Y14.100 Selected item drawing REV A A A A A REV STATUS OF PAGES PAGES 1 2 3 4 5 PMIC N/A PREPARED BY Jesus V. Garcia III DEFENSE SUPPLY CENTER, COLUMBUS
2、COLUMBUS, OH CHECKED BY Andrew R. Ernst APPROVED BY Kendall A. Cottongim TITLE RESISTOR, VARIABLE, WIREWOUND, NONPRECISION, TRIMMER, 3/8 INCH, SQUARE, 1 WATT, FLEXIBLE LEADS SIZE A CODE IDENT. NO. 037Z3 DWG NO. 00001 Original date of drawing: 10 March 2000 REV A PAGE 1 OF 5 AMSC N/A 5905-E555Provide
3、d 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. 00001 REV A PAGE 2 1. SCOPE 1.1 Scope. This drawing describes the requirements for a 1 watt, 3/8 inch square, wirewound, nonpr
4、ecision, variable resistor, trimmer with flexible leads. 1.2 Part or Identifying Number (PIN). The complete PIN is as follows: 00001 - 103 Drawing number Resistance 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.2 Specifications, standards, and handbooks. The following specifications, standards
5、, 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 (see 6.2). DEPARTMENT OF DEFENSE SPECIFICATION MIL-PRF-27208 - Resistor, Variable, Wirewound, Nonprecision, General Specification
6、 for. DEPARTMENT OF DEFENSE STANDARD MIL-STD-1285 - Marking of Electrical and Electronic Parts. (Copies of these documents are available online at http:/asist.daps.dla.mil/quicksearch/ or http:/assist.daps.dla.mil from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philade
7、lphia, 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
8、 obtained. 3. REQUIREMENTS 3.1 Item requirements. The individual item requirements shall be in accordance with MIL-PRF-27208 and as specified herein. 3.2 Interface and physical dimensions. The resistor shall meet the interface and physical dimensions as specified in MIL-PRF-27208 and herein (see fig
9、ure 1). 3.3 Electrical characteristics. 3.3.1 Nominal resistance value. The nominal resistance values are as specified in table I. 3.3.2 Actual effective electrical travel. Actual effective electrical travel shall be 18 turns minimum, and 26 turns maximum. 3.3.3 Resistance tolerance. The resistance
10、tolerance shall be 5 percent. 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. 00001 REV A PAGE 3 NOTE: 1. Dimensions are in inches. Metric equivalents are given for ge
11、neral information only. 2. The three leads shall be insulated wire, AWG 30, having a minimum length of 6 inches (152.4 mm); they shall be insulated with polytetrafluoroethylene, stripped .250 .062 (6.35 1.57mm) from the end and color code. 3. The picturization of the resistor above is a given repres
12、entative 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 are acceptable. FIGURE 1. Flexible lead, variable wirewound trimmer. TABLE I. Nominal resistance value. Dash number -XXX Nomi
13、nal resistance value (in ohms) Dash number -XXX Nominal resistance value (in ohms) 100 10 202 2000 200 20 502 5000 500 50 103 10000 101 100 203 20000 201 200 253 25000 501 500 353 35000 102 1000 503 50000 Inches mm Inches mm Inches mm Inches mm .003 0.076 .023 0.584 .075 1.90 .314 7.98 .005 0.127 .0
14、55 1.40 .117 2.97 .380 9.65 .010 0.254 .060 1.52 .150 3.81 .419 10.64 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. 00001 REV A PAGE 4 3.3.4 Power rating. The power
15、rating shall be 1.0 watt. 3.3.5 Operating torque. The operating torque shall be 5 ounce-inches maximum. 3.3.6 Operating temperature. The operating temperature shall be -65oC to +150oC. 3.3.7 Terminal. Resistors are available in flexible “L” type terminals. 3.3.7.1 Pure tin. The use of pure tin, as a
16、n 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). 3.3.8 Resistance temperature characteristic. The resistance temper
17、ature characteristic shall be 50 PPM/OC. 3.4 Marking. Marking shall be accordance with MIL-STD-1285, except the resistors shall be marked with the PIN assigned herein, (see 1.2), manufacturers identification code (CAGE or logo), and date and lot codes. 3.5 Recycled, recovered, or environmentally pre
18、ferable 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. 3.6 Certificate of complian
19、ce. A certificate of compliance shall be required from manufacturers requesting to be a suggested source of supply. 3.7 Workmanship. Resistors shall be processed in such a manner as to be uniform in quality and parts shall be free from any defects that will affect life, serviceability, or appearance
20、. 4. VERIFICATION 4.1 Qualification inspection. Qualification inspection is not applicable to this document. 4.2 Conformance inspection. 4.2.1 Inspection of product for delivery. Inspection of product for delivery shall consist of the group A inspections of MIL-PRF-27208. 4.2.1.1 Group A inspection.
21、 Group A inspection shall be in accordance with MIL-PRF-27208. 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 personnel or in-house contractor personnel, t
22、hese 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 Agency, or within the Military Departments System Comman
23、d. 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. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENS
24、E SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO SIZE A CODE IDENT NO. 037Z3 DWG NO. 00001 REV A PAGE 5 6. NOTES (This section contains information of a general or explanatory nature which may be helpful, but is not mandatory.) 6.1 Intended use. Resistors conforming to this drawing are intended for use when
25、 military specifications do not exist and qualified military devices that will perform the required function are not available for the OEM application. 6.2 Ordering data. The contract or purchase order should specify the following: a. Complete PIN (see 1.2). b. Requirements for delivery of one copy
26、of the conformance inspection data or certificate of compliance that parts have passed conformance inspection with each shipment of parts by the manufacturer. c. Requirements for packaging and packing. 6.3 Tin whisker growth. The use of alloys with tin content greater than 97 percent, by mass, may e
27、xhibit 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 form
28、ation 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 Users of record. Coordination of this document for future revis
29、ions are coordinated only 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 archived online at resistordla.mil or in writing to: DSCC-VAT, P. O. Box 3990, Columbus, OH 43218-3990 or by telephone (614) 692-8754
30、 or DSN 850-8754. 6.5 Suggested sources of supply. Suggested sources of supply are listed herein. Additional sources will be added as they become available. For assistance in the use of this drawing, contact DSCC-VAT, P. O. Box 3990, Columbus, Columbus, OH 43218-3990 or by telephone (614) 692-8754 o
31、r DSN 850-8754. DSCC drawing PIN Vendors similar designation or type number 1/ Vendor CAGE Vendors name and address 00001 117S 17826 Vishay Techno 7803 Lemona Van Nuys, CA 91405-1139 1/ Parts must be purchased to this DSCC PIN to assure that all performance requirements and tests are met. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
