1、AMSC N/A 1 of 6 FSC 5945 INCH-POUND MS27742E 27 November 2003 SUPERSEDING MS27742D(USAF) 31 Jan 1992 DETAIL SPECIFICATION SHEET RELAYS, ELECTROMAGNETIC, TYPE I, MAGNETIC LATCH, 25 AMPERES, 3 PDT, ALL WELDED, HERMETICALLY SEALED This specification is approved for use by all Departments and Agencies o
2、f the Department of Defense. The requirements for acquiring the relay described herein shall consist of this specification and the latest issue of MIL-PRF-6106. FIGURE 1. Dimensions and configuration. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-M
3、S27742E 2 FIGURE 1. Dimensions and configurations.- Continued Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS27742E 3 Inches mm Inches mm .001 0.02 .172 4.36 .600 15.24 .002 0.05 .218 5.53 .625 15.87 .003 0.07 .234 5.94 .630 16.00 .005 0.12 .250 6
4、.35 .650 16.51 .020 0.50 .270 6.85 1.010 25.65 .040 1.01 .300 7.62 1.025 26.03 .050 1.27 .312 7.92 1.062 26.97 .062 1.57 .375 9.52 1.396 35.45 .093 2.36 .395 10.03 1.446 36.72 .150 3.81 .432 10.97 1.718 43.63 .156 3.96 .450 11.43 NOTES: 1. Dimensions are in inches. 2. Metric equivalents are given fo
5、r general information only. 3. Unless otherwise specified, tolerance is .010 (0.25 mm). 4. There shall be affixed to the relay a suitable legible circuit diagram that identifies each terminal location specified. 5. In the event of a conflict between the text of this specification and the references
6、cited herein, the text of this specification shall take precedence. 6. Referenced Government documents of the issue listed in that issue of the Department of Defense Index of specifications and standards (DoDISS) specified in the solicitation form a part of this specification to the extent specified
7、 herein. 7. Relay is magnetically latched in both positions. 8. Note to observe polarity must appear on relays. 9. X1 and X2 diameter .062 .001. Y1 and Y2 diameter .040 .001. 10. Coils are not to be energized simultaneously. 11. Socket pin terminals shall provide the operational, environmental, and
8、interface characteristics to provide a reliable interconnect to gold-plated contacts. Terminals shall be gold plated. One system for gold plating that may be used is ASTM B488, type 3, class 1.25 with a nickel underplate of 50 to 150 microinches thick. The gold plating system shall enable the produc
9、t to meet the performance requirements of this specification and shall be approved by the qualifying activity. 12. Gasket shall provide a reliable seal between the relay and mating socket that will meet the environmental, operational, and interface requirements of the relay with the mating socket. T
10、he gasket shall have shore hardness 20 5, thickness .050 .005. Gasket material according to AMS 3332 has been considered acceptable. FIGURE 1. Dimensions and configurations - Continued. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS27742E 4 REQUI
11、REMENTS: Contact data: Load ratings: See table I. Initial contact voltage drop: 0.150 volt. After life test: 0.175 V. Overload current: 50 amperes dc; 80 amperes ac. Rupture current: 60 amperes dc; 100 amperes ac. Coil data: See table II. Duty rating: Continuous. Electrical data: Insulation resistan
12、ce: Initial: 100 megohms. After life or environmental test: 50 megohms. Dielectric withstanding voltage: Sea level: Initial After life tests Coil to case 1,000 1,000 Aux contacts N/A N/A All other points 1,250 1,000 Altitude: 80,000 ft 300,000 ft Coil to case 350 500 Aux contacts N/A All other point
13、s 350 500 Environmental characteristics: Temperature range: -70C to +125C. Maximum altitude rating: 300,000 feet. Shock g-level: 200 gs. Duration: 6 ms. Max duration contact opening: 10 s. Vibration - sinusoidal: G-level 30 gs. Frequency range 10 - 3,000 Hz. Provided by IHSNot for ResaleNo reproduct
14、ion or networking permitted without license from IHS-,-,-MS27742E 5 Vibration - random: Applicable specification: MIL-STD-202, method 214. Test condition: IG. Duration: 15 minutes each plane. Acceleration 15 gs. Physical data: Dimensions and configurations: See figure 1. Weight: 0.18 pound maximum.
15、Part or Identifying Number (PIN): MS27742- (dash number from table II). Qualification by similarity: See MIL-PRF-6106. TABLE I. Rated contact load (amperes per pole) case grounded. 28 V dc 115 V ac, phase 115/200 V ac, 3 phase 1/ Main Aux Main Aux Main Aux Type of load Life operating cycles x 103NO
16、NC NO NC 400 Hz 60 Hz 400 Hz 60 Hz 400 Hz 400 Hz 60 Hz See appropriate notes Resistive 2/ 50 25 25 25 25 Inductive 10 12 12 Inductive 20 15 15 Motor 50 10 10 10 10 Lamp 50 5 5 5 5 Transfer load - - - 3/ Mechanical life reduced current 200 6 6 6 6 Mixed loads Applicable per specification 1/ Absence o
17、f value indicates relay is not rated for 3 phase applications. 2/ For full rated load, temperature, and altitude, use number 12 wire or larger. Relays shall be mounted so that mounting bracket temperature is limited to +135C maximum. 2/ Transfer load indicates relay is suitable for transfer between
18、unsynchronized ac power supplies at rating indicated. TABLE II Dash number and characteristics. Coil data Time - (milliseconds maximum) Rated MaximumAt +25C Max pick-up voltage Contact Bounce Main AuxPart no. MS 27742- Term-inal type Volts 1/ Freq Hz Res Volts Amp Nor- mal 2/ High temptest Cont cur-
19、rent test Drop out volt- age 2/ Oper-ate 3/ Rel-ease 4/ NO NC NO NC 1 Solder hook 28 dc - 29 .075 18 19.8 22.5 N/A 15 - 1.0 1.0 - - 2 Socket pin 28 Dc - 29 .075 18 19.8 22.5 N/A 15 - 1.0 1.0 - - 1/ Caution: Use of any coil voltage less than nominal coil voltage will compromise the operation of the r
20、elay. 2/ Over the temperature range 3/ With rated coil voltage. 4/ From rated coil voltage. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS27742E 6 NOTES Referenced documents. In addition to MIL-PRF-6106, this specification sheet references the fo
21、llowing documents. (Government documents are available on line at http:/assist.daps.dla.mil/quicksearch or www.dodssp.daps.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094). Society of Automotive Engineers documents are available from
22、the Society of Automotive Engineers 400 Commonwealth Drive Warrendale, Pennsylvania, United States, 15096-0001. http:/www.sae.org STANDARDS Department of Defense MIL-STD-202 - Electronic and Electrical Component Parts Society of Automotive Engineers (SAE) SAE-AMS3332 - Silicone Rubber Extreme Low-Te
23、mperature Resistant, 15-30 Custodians: Preparing activity:Air Force - 11 DLA - CC DLA - CC (Project 5945-1221) Review activities: AF - 99 NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using ASSIST Online database at www.dodssp.daps.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
