1、 REVISIONS LTR DESCRIPTION DATE APPROVED Prepared in accordance with ASME Y14.100 Source control drawing REV STATUS OF PAGES REV PAGES 1 2 3 4 5 6 7 8 PMIC N/A PREPARED BY Jesus V. Garcia III DLA LAND AND MARITIME COLUMBUS, OH Original date of drawing: 2 March 2012 CHECKED BY Andrew R. Ernst TITLE R
2、ESISTOR, VARIABLE, WIREWOUND, (LOW OPERATING TEMPERATURE) 1.0 WATT APPROVED BY Michael A. Radecki SIZE A CODE IDENT. NO. 037Z3 DWG NO. 12002 REV PAGE 1 OF 8 AMSC N/A 5905-2012-E14 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DLA LAND AND MARITIME
3、COLUMBUS, OHIO SIZE A CODE IDENT NO. 037Z3 DWG NO. 12002 REV PAGE 2 1. SCOPE 1.1 Scope. This drawing describes the requirements for a low operating temperature, wirewound, 1 watt, variable resistor. 1.2 Part or Identifying Number (PIN). The complete PIN is as follows: 12002 - N A SL 103 A Drawing nu
4、mber Bushing (1.2.1) Switch (1.2.2) Operating shaft and length (1.2.3) Resistance (3.3.1) Resistance Characteristic (1.2.4) 1.2.1 Bushing. The type of bushing is identified by a single letter in accordance with table I. TABLE I. Bushing. Symbol Bushing N Standard L Locking 1.2.2 Switch. The type of
5、attached switch or absence of a switch is identified by a single letter in accordance with table II. TABLE II. Switch. Symbol Switch A No switch 1.2.3 Operating shaft and length. The operating shaft styles are identified by a two letter symbol. The first letter indicates operating shaft in accordanc
6、e with table III, and the second letter indicates operating shaft length, in accordance with table IV (see 3.1). TABLE III. Style of operating shaft. Symbol Shaft S Slotted TABLE IV. Shaft length Symbol Length of shaft from mounting surface, nominal Bushings N in inches (0.03125) Bushings L in inche
7、s (0.03125) D 0.875 0.875 L 0.313 M 0.438 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DLA LAND AND MARITIME COLUMBUS, OHIO SIZE A CODE IDENT NO. 037Z3 DWG NO. 12002 REV PAGE 3 1.2.4 Resistance characteristic. The resistance characteristic is iden
8、tified by a single letter in accordance with table V. TABLE V. Resistance characteristic. Symbol Resistance taper A A 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.2 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to
9、 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-19 - Resistor, Variable, Wirewound (Low Operating Temperature), General Specification. DEPARTMENT OF DEFENSE STANDARD MIL
10、-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, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094). 2.2 Order of precedence. Unless otherwise
11、 noted herein or in the contract, 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 unless otherwise noted. Nothing in this document, however, supersedes applicable laws a
12、nd 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-19 and as specified herein. 3.2 Interface and physical dimensions. The resistor shall meet the interface and physical dimensions a
13、s specified in MIL-PRF-19 and herein (see figure 1). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DLA LAND AND MARITIME COLUMBUS, OHIO SIZE A CODE IDENT NO. 037Z3 DWG NO. 12002 REV PAGE 4 Letter Dimension Letter Dimension Letter Dimension A 0.44 .
14、008 F 0.125 .005 L 1.06 ref B 0.055 .008 G 0.75 .015 M 0.032 + .010 C 0.12 min H 0.234 .015 N 0.032 .005 D 0.25 .02 J 0.75 .03 P 0.02 max E 0.125 +.001/-.002 K 0.70 max R 0.38 .02 FIGURE 1. Wirewound variable resistor. Inches mm Inches mm Inches mm Inches mm Inches mm 0.001 0.0254 0.010 0.254 0.032
15、0.8128 0.234 5.9436 0.75 19.05 0.002 0.0508 0.015 0.381 0.055 1.397 0.25 6.35 0.83 21.082 0.005 0.127 0.02 0.508 0.12 3.048 0.44 11.176 1.06 26.924 0.008 0.2032 0.03 0.762 0.125 3.175 0.7 17.78 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DLA LAND
16、 AND MARITIME COLUMBUS, OHIO SIZE A CODE IDENT NO. 037Z3 DWG NO. 12002 REV PAGE 5 NOTE: 1. Dimensions are in inches. Metric equivalents (to the nearest .01) are given for general information only and are based upon 1 inch = 25.4 millimeters. 2. The picturization of the resistor above is a given repr
17、esentative 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. 3 Terminal identification for reference only. FIGURE 1. Wirewound variable resistor. Continued 3.3 Electric
18、al characteristics. 3.3.1 Nominal resistance value. The nominal total resistance value expressed in ohms is identified by a three digit number; the first two digits represent significant figures and the last specifies the number of zeros to follow. When fractional values of an ohm are required, the
19、letter “R” will be substituted for one of the significant digits to represent the decimal point, and the succeeding digits of the group will represent significant figures; e.g., 150 signifies 15 ohms. The nominal resistance values are as specified in table VI TABLE VI. Nominal resistance value. Resi
20、stance Nominal resistance value (in ohms) Resistance Nominal resistance value (in ohms) Resistance Nominal resistance value (in ohms) 150 15 151 150 751 750 250 25 201 200 102 1,000 500 50 251 250 152 1,500 750 75 351 350 202 2,000 101 100 501 500 252 2,500 3.3.2 Resistance tolerance. The resistance
21、 tolerance shall be 10 percent. 3.3.3 Power rating. The power rating shall be 1.0 watt at 40OC derated to zero power at 125OC in accordance with figure 2. FIGURE 2. Derating curve. 3.3.4 Rotation. The actual effective, electrical and mechanical rotation shall be 300O 5O. -60 -40 -20 0 20 40 60 80 10
22、0 120 140 160 Temperature (OC) 100 80 60 40 20 0 125OC -55OC Percentofrated powerProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DLA LAND AND MARITIME COLUMBUS, OHIO SIZE A CODE IDENT NO. 037Z3 DWG NO. 12002 REV PAGE 6 3.3.5 Operating temperature. Th
23、e operating temperature shall be -55OC to +125OC. 3.3.6 Torque. 3.3.6.1 Operating torque. The operating torque shall be in accordance with table VII. Table VII. Operating torque. Bushing type Torque (once-inch) Minimum Maximum Standard 0.3 6.0 Locking 20 1/ - 1/ With jam nut tightened to 8 pound-inc
24、hes (lbs-in). 3.3.6.2 Stop Torque. The Stop toque shall be 3.0 pound-inches (lbs-in) maximum. 3.3.7 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 s
25、hall be alloyed with a minimum of 3 percent lead, by mass (see 6.3). 3.4 Hardware. The hardware shall consist a mounting nut, 0.062 inch (1.57 mm) thick and 0.312 inch (7.92 mm) across the hexagonal flats, a locking nut 0.125 inch (3.175 mm) thick and 0.312 inch (7.92 mm) across the hexagonal flats
26、and an internal-tooth lockwasher of suitable size. Thread size is 0.25-32 UNEF-2B 3.5 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. 3.6 Ma
27、nufacturer eligibility. To be eligible for listing as a approved source of supply, a manufacturer shall be listed on the MIL-PRF-19 Qualified Products List for at least one part, or perform the group A and group B inspections specified herein on a sample of parts agreed upon by the manufacturer and
28、DLA Land and Maritime - VAT. 3.6.1 Certificate of compliance. A certificate of compliance shall be required from manufacturers requesting to be a suggested source of supply. 3.7 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials
29、 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. 3.8 Workmanship. Resistors shall be processed in such a manner as to be uniform in quality and parts shall
30、 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 inspections. 4.2.1 Inspection of product for delivery. Inspection of product for delivery shall c
31、onsist of group A and group B inspections of MIL-PRF-19. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DLA LAND AND MARITIME COLUMBUS, OHIO SIZE A CODE IDENT NO. 037Z3 DWG NO. 12002 REV PAGE 7 4.2.2 Certification. The acquiring activity, at its dis
32、cretion, may accept a certificate of compliance with group B requirements in lieu of performing group B tests (see 6.2d). 4.3 Inspection of packaging. Inspection of packaging shall be in accordance with MIL-PRF-19. 4.4 Visual and mechanical examination. Resistors shall be examined to verify that the
33、 materials, design, construction, physical dimensions, marking, and workmanship are in accordance with the applicable requirements of MIL-PRF-19. 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
34、of materiel is to be performed by DoD or in-house contractor personnel, these 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 Depar
35、tment or Defense Agency, or within the Military Departments Services System Command. 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. 6. NOTES (This section
36、 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 qualified military devices that will perform the required function are not a
37、vailable 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 or certificate of compliance that parts have passed conformance inspection with each
38、shipment of parts by the manufacturer. c. Requirements for packaging and packing. d. Whether the manufacturer performs the group B tests or provides certification of compliance with group B requirements (see 4.2.2). 6.3 Tin whisker growth. The use of alloys with tin content greater than 97 percent,
39、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 pr
40、event 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 Users of record. Coordination of this document fo
41、r future revisions is 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 achieved on-line at resistordla.mil or in writing to: DLA Land and Maritime, ATTN: VAT, P.O. Box 3990, Columbus, OH 4321
42、8-3990 or by telephone (614) 692-8754 or DSN 850-8754. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DLA LAND AND MARITIME COLUMBUS, OHIO SIZE A CODE IDENT NO. 037Z3 DWG NO. 12002 REV PAGE 8 6.5 Sources of supply. Approved sources of supply are lis
43、ted herein. Additional sources will be added as they become available. Assistance in the use of this drawing may be obtained on on-line at resistordla.mil or contact DLA Land and Maritime, ATTN: VAT, P.O. Box 3990, Columbus, OH 43218-3990, or by telephone (614) 692-8754 or DSN 850-8754. DLA Land and
44、 Maritime drawing PIN Vendor similar designation or type number 1/ Vendor CAGE Vendors name and address 12002 49M 4VJA1 Richmond Contract Manufacturing, Inc. P.O. Box 247, 307 Front Street Richmond, ME 04357-1374 1/ Parts must be purchased to this DLA land and Maritime PIN to assure that all performance requirements and tests are met. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
