INCH-POUND MS27254H 27 November 2003 SUPERSEDING MS27254G 10 Feb 1989 DETAIL SPECIFICATION SHEET RELAYS, ELECTROMAGNETIC, 10 AMPERES, 4 PDT TYPE I, PLUG-IN, HERMETICALLY SEALED INACTIVE FOR NEW DESIGN AFTER 5 JUNE 1987. NO SUPERSEDING SPECIFICATION. FOR NEW DESIGN, USE MIL-PRF-83536/15, 16, 17. This specification is approved for use by all Departments and Agencies of 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. AMSC N/A 1 of 5 Source: https://assist.dla.mil -- Downloaded: 2018-10-13T10:01Z Check the source to verify that this is the current version before use. FSC 5945 MS27254H Inches .001 .002 .004 .005 .031 .040 .047 .062 .105 .144 mm 0.03 0.05 0.10 0.13 0.79 1.02 1.19 1.57 2.67 3.66 Inches .156 .157 .210 .230 .281 .314 .315 .362 .420 .524 mm 3.96 3.99 5.33 5.84 7.14 7.98 8.00 9.19 10.67 13.31 Inches .630 .734 .921 1.047 1.078 1.140 1.359 1.437 mm 16.00 18.64 23.39 27.38 28.58 28.96 34.52 36.50 NOTES: 1. Dimensions are in inches. 2. Metric equivalents are given for general information only. 3. Unless otherwise specified, tolerance is .010 (0.25 mm). 4. Terminal numbers need not appear on relay headers provided there is affixed to the relay a suitable legible circuit diagram that identifies each terminal location specified. 5. Pins to be perpendicular to header within one inch. 6. The use of diodes on ac relays is optional. Actual application must be shown on label. 7. In the event of a conflict between the text of this standard and the references cited herein, the text of this standard shall take precedence. 8. 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 herein. 9. 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. The gasket shall have shore hardeness 20 5, thickness .047. Gasket material according to AMS 3332 has been considered acceptable. FIGURE 1. Dimensions and configurations - Continued. 2 Source: https://assist.dla.mil -- Downloaded: 2018-10-13T10:01Z Check the source to verify that this is the current version before use. MS27254H TABLE I. Dash numbers and characteristics. Dash number MS27254- Type Coil 1 2 I I ac dc Terminal type Plug-in Plug-in Max weight in pounds .20 .20 TABLE II. Operating characteristics. Coil data Part no. MS 27254- 1/ 2/ 3/ 4/ Coil Nominal Volts 1/ Freq Hz Max Time - (milliseconds maximum) Max pick-up voltage Res Volts Amp Normal 2/ High temp test Cont current test Hold voltage 2/ Drop out voltage 2/ Oper -ate 3/ Release 4/ Contact Bounce Main Aux NO NC NO NC 1 ac 115 400 N/A 120 .04 90 95 103 30 5 15 30 3 5 --- --- 2 dc 28 dc 160 29 .20 18 19.5 22.5 7 1.5 10 10 3 5 --- --- Caution: Use of any coil voltage less than nominal coil voltage will compromise the operation of the relay. Over the temperature range. With nominal coil voltage. From nominal coil voltage. TABLE III. Rated contact load (amperes per pole) (case grounded). Type of load Resistive Inductive Inductive Motor Lamp Transfer load Mechanical life reduced current Mixed loads Life operat ing cycles 3 x 10 28 V dc Main Aux NO NC 115 V ac, 1 phase Main Aux 400 60 400 60 Hz Hz Hz Hz 115/200 V ac, 3 phase 1/ Main Aux 400 60 400 60 Hz Hz Hz Hz NO NC 100 50 10 10 10 10 10 10 10 10 100 100 5 3 5 3 5 3 5 3 400 2.5 2.5 100 See appro priate notes Applicable per specification 1/ Absence of value indicates relay is not rated for 3 phase applications. 2/ 100,000 operations - on NO contacts, and 50,000 operations on NC contacts at 28 V dc. 3/ Transfer load indicates relay is suitable for transfer between unsynchronized ac power supplies at rating indicated. 3 Source: https://assist.dla.mil -- Downloaded: 2018-10-13T10:01Z Check the source to verify that this is the current version before use. 2/ 2/ 3/ MS27254H Environmental characteristics: Temperature range: -70C to +125C. Maximum altitude rating: 80,000 feet. Shock g-level: 25 g's. Duration: 11 ms. Max duration contact opening: 10 s. Vibration - sinusoidal: G-level: 20 g's. Frequency range: 10 - 2,000 Hz. Vibration - random. Applicable specification N/A. Power spectral density N/A. RMS G min N/A. Frequency range N/A. Curve N/A. High shock N/A. Acceleration: 15 g's. Electrical characteristics: Insulation resistance, initial: 100 megohms. After life or environmental tests: 50 megohms. Dielectric strength (sea level): Coil to case Aux contacts All other points Initial After life tests 1,000 V rms N/A 1,500 V rms 1,000 V rms N/A 1,125 V rms Initial N/A N/A N/A After life tests 250 V rms Dielectric strength (altitude): Coil to case Aux contacts All other points 350 V rms 4 Source: https://assist.dla.mil -- Downloaded: 2018-10-13T10:01Z Check the source to verify that this is the current version before use. MS27254H Maximum contact drop initial: 0.150 volt. After life test: 0.175 volt. Overload current: 40 amperes dc, 60 amperes ac. Rupture current: 50 amperes dc, 80 amperesac. Duty rating: Continuous. RFI specification MIL-STD-461. (applicable to coil circuits of ac operated relays) Conformance inspection: Performance of groups B and C tests are not applicable. Group A acceptance reports shall be submitted to the qualifying activity on a yearly basis in order to retain qualification for this military specification sheet. Qualification by similarity: See MIL-PRF-6106. NOTES Referenced documents. In addition to MIL-PRF-6106, this specification sheet references the following 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 the Society of Automotive Engineers 400 Commonwealth Drive Warrendale, Pennsylvania, United States, 15096-0001. http://www.sae.org STANDARDS Department of Defense MIL-STD-461 - Requirements for the Control of Electromagnetic Interference Characteristics of Subsystems and Equipment Society of Automotive Engineers (SAE) SAE-AMS3332 - Silicone Rubber Extreme Low-Temperature Resistant, 15-30 Custodians: NAVY - AS Air Force - 11 DLA - CC Preparing activity: DLA - CC (Project 5945-1221-17) Review activities: Navy - EC 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. 5 Source: https://assist.dla.mil -- Downloaded: 2018-10-13T10:01Z Check the source to verify that this is the current version before use.