1、 REVISIONS LTR DESCRIPTION DATE APPROVED A Dimensional changes, editorial changes throughout 24 MAR 03 Kendall A. Cottongim B Inactivation for new design. Editorial changes throughout 3 NOV 09 Michael A. Radecki C Reactivation for new design. 25 FEB 10 Michael A. Radecki Notice of Reactivation DSCC
2、Drawing 97012 is hereby reactivated and may be used for either new or existing design. Prepared in accordance with ASME Y14.100 Source control drawing REV STATUS OF PAGES REV C C C C C PAGES 1 2 3 4 5 PMIC N/A PREPARED BY Andrew R. Ernst DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OH Original date of
3、drawing CHECKED BY Andrew Ernst TITLE RESISTORS, VARIABLE, NONWIRE WOUND, TRIMMER, 3/4 WATTS, FLEXIBLE LEADS 24 October 1997 APPROVED BY David E. Moore SIZE A CODE IDENT. NO. 037Z3 DWG NO. 97012 REV C PAGE 1 OF 5 AMSC N/A 5905-E745 .Provided by IHSNot for ResaleNo reproduction or networking permitte
4、d without license from IHS-,-,-DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO SIZE A CODE IDENT NO. 037Z3 DWG NO. 97012 REV C PAGE 2 1. SCOPE 1.1 Scope. This drawing describes the requirements for a 3/4 watt trimmer, nonwire wound, variable resistor with flexible leads. 1.2 Part or Identifying Numbe
5、r (PIN). The complete PIN is as follows: 97012 - * Drawing number Resistance Code (See table I) 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specifie
6、d herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-PRF-22097 - Resistors, Variable, Non-wirewound, (Adjustment Type), General Specification for. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-1285 - M
7、arking 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, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2 Order of precedence. Unless otherwise noted herein
8、 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. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been o
9、btained. 3. REQUIREMENTS 3.1 Item Requirements. The individual item requirements shall be in accordance with MIL-PRF-22097 and as specified herein. 3.2 Interface and physical dimensions. The resistor shall meet the interface and physical dimensions as specified in MIL-PRF-22097 and herein (see figur
10、e 1). 3.3 Electrical characteristics. 3.3.1 Resistance. The nominal resistance expressed in ohms is identified by a three-digit number; the first two digits represent significant figures and the last digit specifies the number of zeros to follow and is specified in table I. 3.3.2 Resistance toleranc
11、e. The resistance tolerance shall be 10 percent. 3.3.3 Power rating. The power rating shall be 3/4 watts. 3.3.4 Operating temperature. The operating temperature shall be -55OC to +150OC. 3.3.5 Operating torque. The operating torque shall be 8 ounce-inches maximum. 3.3.6 Voltage rating. The maximum r
12、ated ac or dc working voltage shall be specified in table I. 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. 97012 REV C PAGE 3 Inches mm Inches mm Inches mm Inches mm
13、 0.010 0.25 0.031 0.79 0.093 2.36 0.135 3.43 0.015 0.38 0.032 0.81 0.105 2.67 0.190 4.83 0.022 0.56 0.058 1.47 0.115 2.67 0.315 8.00 0.025 0.64 0.063 1.60 0.125 3.18 1.000 25.40 1.250 31.75 NOTE: 1. Dimensions are in inches. 2. Unless otherwise specified, tolerance is 0.010 inch (0.25 mm). 3. Metric
14、 equivalents are given for general information only. 4. The three leads shall be insulated wire, AWG size 28 to 30, having a minimum length of 6 inches (152.4 mm); they shall be insulated with polytetrafluoroethylene, stripped 0.250 inches 0.062 inches (6.35 1.57mm) from the end and color coded. 5.
15、The picturization of the resistor above is a given 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) are acceptable. FIGURE 1. Resistor variable nonwire wound. 3.3.7 Ac
16、tual effective electrical travel. The actual effective electrical travel shall be 17 turns minimum, and 27 turns maximum. 3.3.8 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
17、 97 percent, by mass. Tin shall be alloyed with a minimum of 3 percent lead, by mass (see 6.4). 3.4 Marking. Resistors shall be in accordance with MIL-STD-1285, except the resistors shall be marked with the PIN assigned herein, (see 1.2), manufacturers identification (Commercial and Government Entit
18、y (CAGE) or logo), and date and lot codes. 3.5 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible provided the material meets or exceeds the operational and maintenance requirements,
19、 and promotes economically advantageous life cycle costs. 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. 97012 REV C PAGE 4 TABLE I. Resistance values and maximum rat
20、ed ac or dc working voltage. Resistance code Resistance Maximum rated ac or dc working voltage 100 10 2.7 200 20 3.8 500 50 6.1 101 100 8.7 201 200 12.3 501 500 19.4 102 1,000 27.4 202 2,000 38.7 502 5,000 61.3 103 10,000 86.7 203 20,000 122 253 25,000 136 503 50,000 194 104 100,000 274 204 200,000
21、300 254 250,000 300 504 500,000 300 105 1,000,000 300 3.6 Manufacturer eligibility. To be eligible for listing as a approved source of supply, a manufacturer shall be listed on the MIL-PRF-22097 Qualified Products List for at least one part, or perform the group A inspections specified herein on a s
22、ample agreed upon by the manufacturer and DSCC-VA. 3.6.1 Certificate of compliance. A certificate of compliance shall be required from manufacturers requesting to be listed as an approved source of supply. 3.7 Workmanship. Resistors shall be processed in such a manner as to be uniform in quality and
23、 parts shall be 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 Conformance inspection. 4.2.1 Inspection of product for delivery. Inspection of product for deliv
24、ery shall consist of the group A inspections. 4.2.1.1 Group A inspection. Group A inspection shall be in accordance with MIL-PRF-22097. 4.3 Dielectric withstanding voltage. In the dielectric withstanding voltage test, the applied potential shall be 900 Volts (rms) at atmospheric pressure and 350 Vol
25、ts (rms) at reduced barometric pressure. 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 t
26、he responsible packaging activity to ascertain packaging requirements. Packaging requirements are maintained by the Inventory Control Points packaging activities within the Military Service or Defense Agency, or within the military services system commands. Packaging data retrieval is available from
27、 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-,-,-DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO SIZE
28、 A CODE IDENT NO. 037Z3 DWG NO. 97012 REV C 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 military specifications do not exist and qua
29、lified 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: One copy of the conformance inspection data with each sh
30、ipment of parts by the manufacturer. c. Requirements for packaging and packing. 6.3 PIN supersession. The PIN in the original 97012 has been superseded by a new PIN in revision A that includes a resistance code in lieu of a dash number. Table II illustrates a generic PIN substitution. TABLE II. PIN
31、supersession. 97012 Revision A 97012 -1 97012-100 6.4 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
32、 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, r
33、efer to ASTM-B545 (Standard Specification for Electrodeposited Coatings of Tin). 6.5 User of record. Coordination of this document for future revisions is coordinated only with the approved source of supply and the users of record of this document. Requests to be added as a recorded user of this dra
34、wing may be achieved online at resistordla.mil or in writing to: DSCC-VAT, Post Office Box 3990, Columbus, OH 43218-3990 or by telephone (614) 692-0552 or DSN 850-0552. 6.6 Approved source of supply. Approved source of supply is listed herein. Additional sources will be added as they become availabl
35、e. Assistance in the use of this drawing may be obtained online at resistordla.mil 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 Vendor similar designation or type number 1/ Vendor CAGE Vendor name and address 97012-* 3059-FY7 32997 Bourns Trimpot, Inc. 1200 Columbia Ave Riverside, CA 92507-2114 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-,-,-
