1、AMSC N/A FSC 5945 INCH-POUND MS27751K 25 September 2012 SUPERSEDING MS27751J 27 November 2003 DETAIL SPECIFICATION SHEET RELAYS, ELECTROMAGNETIC, 50 AMPERES, DC/60 AMPERES AC, 3 PST OR 3 PDT, HERMETICALLY SEALED, PERMANENT MAGNET DRIVE This specification is approved for use by all Departments and Ag
2、encies of the Department of Defense. The requirements for acquiring the product described herein shall consist of this specification sheet and the latest issue of MIL-PRF-6106. FIGURE 1. Dimensions and configuration.Provided by IHSNot for ResaleNo reproduction or networking permitted without license
3、 from IHS-,-,-MS27751K 2 Inches mm Inches mm .002 0.05 .375 9.52 .005 0.13 .437 11.10.010 0.25 1.91 48.5 .031 0.79 2.000 50.80.10 2.5 2.44 62.0 .138 3.51 2.45 62.2.170 4.32 2.50 63.5 .190 4.83 3.13 79.5.203 5.16 NOTES: 1. Dimensions are in inches. 2. Unless otherwise specified, tolerance is 0.03 for
4、 2 place decimals and 0.010 for 3 place decimals. 3. Metric equivalents are given for general information only. 4. Polarity indication applies to dc coils only. 5. In the event of a conflict between the text of this specification sheet and the references cited herein, the text of this specification
5、sheet shall take precedence. 6. DC versions of this relay must not operate or be damaged by reverse polarity. Semiconductors shall not be used for this purpose. 7. Permanent magnet drive consists of a permanent magnet with its flux path switched and combined with the electromagnetic flux. 8. Additio
6、nal flat washer may be used for terminal seat. 9. Terminal numbers shall not appear on the relay header. There shall be affixed to the relay a legible circuit diagram that identifies each terminal location. 10. Terminal covers and barriers are required on power terminals. 11. No paint on either side
7、 of (2) diagonally opposite mounting flanges, the closest flange to the A1 terminal and the opposite flange. FIGURE 1. Dimensions and configuration - Continued. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS27751K 3 NOTE: When semiconductors are
8、required, JANTX or equivalent screened semiconductors shall be used. Relays using suppression devices shall continue to operate if the suppression circuit is in a failure mode. Diodes shall have a peak inverse voltage of 600 V dc min. FIGURE 2. Circuit and terminal layouts. Provided by IHSNot for Re
9、saleNo reproduction or networking permitted without license from IHS-,-,-MS27751K 4 REQUIREMENTS: Dimensions and configuration: See figure 1. Circuit and terminal layouts: See figure 2. Part or Identifying Numbers (PINs) and general characteristics: See table I. Contact data: Load ratings: See table
10、 II. Maximum contact drop: Initial: 0.150 V. After life test: 0.175 V. Overload current (NO): 125 A dc, 115/200 V ac, 400 Hz, 400A. Rupture current (NO): 150 A dc, 115/200 V ac, 400 Hz, 500 A. Coil data: See table III. Duty rating: continuous. RFI specification: MIL-STD-461 (applicable to coil circu
11、its of ac operated relays). Electrical data: Minimum insulation resistance: Initial: 100 megohms. After life or environmental tests: 50 megohms. Dielectric strength (sea level): 2 - 5 seconds (see table IV). Dielectric strength (altitude): 1 minute (see table V). Environmental characteristics: Opera
12、ting temperature range: -55C to +71C. Maximum altitude rating: 80,000 feet. Shock g level: 50 gs. Duration: 6 ms. Maximum duration contact opening: 10 microseconds. Vibration (sinusoidal): G-level, 10 gs; frequency range, 10-2,000 Hz. Vibration (random): Not applicable. Acceleration: 15 gs. Provided
13、 by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS27751K 5 Physical data: Seal: Hermetic; relays are sealed by welding (laser, tungsten inert gas, or other suitable means, as approved by the qualifying activity). Identification of product: Applicable, except
14、 that resistive ratings for both ac and dc shall be marked as follows: 50 A at 28 V dc and 60 A at 115 V ac, 400 Hz Part or Identifying Number (PIN): MS27751- (plus dash number from table I). Qualification by similarity: See MIL-PRF-6106. TABLE I. PINs and general characteristics. PIN MS27751- Type
15、coil Contacts Terminal type Max weight in pounds 1/ Main Aux 1 I dc 3PDT None Stud .9382 I ac 3PDT None Stud .938 3 I dc 3PNO None Stud .8754 I ac 3PNO None Stud .875 5 I dc 3PNO 1NO-1NC Stud .8756 I ac 3PNO 1NO-1NC Stud .875 7 I dc 3PDT 1NO Stud .9388 I ac 3PDT 1NO Stud .938 9 I dc 3PDT 1NC Stud .9
16、3810 I ac 3PDT 1NC Stud .938 11 dc 3PDT NONE Stud .93812 I ac 3PDT NONE Stud .938 13 dc 3PNO NONE Stud .87514 I ac 3PNO NONE Stud .875 15 dc 3PNO 1NO-1NC Stud .87516 I ac 3PNO 1NO-1NC Stud .875 17 dc 3PDT 1NO Stud .93818 I ac 3PDT 1NO Stud .938 19 dc 3PDT 1NC Stud .93820 I ac 3PDT 1NC Stud .938 21 d
17、c 3PDT NONE Stud .9381/ Weight includes terminal barriers. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS27751K 6 TABLE II. Rated contact load (amperes per pole) (case grounded). Type of load Life operating cycles x 10328 V dc 115 V ac, 1 phase 1
18、15/200 V ac, 3 phase 2/ See appropriate notes Main Aux 1/ Main Aux 1/ Main Aux NO NC NO NC 400 Hz 60 Hz 400 Hz 60 Hz 400 Hz 60 Hz 400 Hz 60 Hz Resistive 50 50 50 3 3 60 3 60 Inductive 20 20 20 3 3 3 Inductive 50 2 2 60 2 60 Motor 50 20 20 40 40 Lamp 50 10 10 1 1 15 1 Transfer, load 10 12.5/60 12.5/6
19、0 3/ Mechanical life reduced current 200 7 7 1 1 14 1 14 Mixed loads 60 1 1 5 5 1/ Applicable to -5 through -10 and -15 through -20. 2/ Absence of value indicates relay is not rated for 3 phase application. 3/ Transfer load indicates relay is suitable for transfer between unsynchronized ac power sup
20、plies of rating indicated: 12.5 amperes -1 through -10 and -21; 60 amperes -11 through -20. Application notes: 1. Examination of product, external parts, shall be performed in accordance with MIL-PRF-6106, except that the case temperature shall be limited to 150C maximum. 2. Strength of terminals sh
21、all be performed in accordance with MIL-PRF-6106, except that test shall be performed at room ambient temperature only. TABLE III. Operating characteristics. 1/ PIN MS 27751- Coil data Time - (milliseconds maximum) Coil Nominal Max Max pick-up voltage Hold vol- tage 4 Drop out volt- age 4/ Oper-ate
22、5/ Rel-ease 6/ Contact Bounce Volts 3/ Freq Hz Res Volts 3/ Amp at 25C Rated 4/ High temptest Cont cur-rent test Main Aux 2/ NO NC NO NC -1, -3, -5 -7, -9, -11, -13 -15, -17 -19, -21 7/ X1,X2 28 dc 200 29 .160 18 20 21 7.0 1.5 50 25 3 3 4 4 -2, -4, -6 -8, -10 -12, -14 -16, -18 -20 7/ X1,X2 115 400 8
23、/ - 124 .100 90 95 100 35 5.0 50 80 3 3 4 4 1/ Contact transfer time at rated voltage is 1.8 milliseconds minimum for -11 through -20. 2/ Applicable to -5 through -10 and -15 through -20. 3/ Caution: The use of any coil voltage less than the rated coil voltage will compromise the operation of the re
24、lay. 4/ Over the temperature range. 5/ with rated coil voltage. 6/ From rated coil voltage. 7/ Applicable to -21 only. coil suppression (transient voltage back EMF) shall be 42 V dc max. 8/ Will operate on 115 V ac, 60 Hz with slightly higher coil current. Provided by IHSNot for ResaleNo reproductio
25、n or networking permitted without license from IHS-,-,-MS27751K 7 TABLE IV. Dielectric strength, sea level. Dielectric strength Initial After life tests Coil to case 1,000 V rms 1,000 V rms Auxiliary contacts 1,000 V rms 1,000 v rms All other points 1,500 V rms 1,150 V rms TABLE V. Dielectric streng
26、th, altitude(50,000 feet). Coil to case 500 V rms Auxiliary contacts 500 V rms All other points 700 V rms Changes from previous issue. The margins of this specification are marked with vertical lines to indicate where changes from the previous issue were made. This was done as a convenience only and
27、 the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous issue. Referenced docu
28、ments. In addition to MIL-PRF-6106, this document references the following: MIL-STD-461 Custodians: Preparing activity: Air Force 85 DLA - CC DLA CC Review activity: (Project 5945-2012-031) Air Force - 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 the ASSIST Online database at https:/assist.dla.mil/. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
