. 062
MAX
111.
078 MAXI
NAMEPLATE
GASKET
SEE
NOTE
9
LOCATING
PIN
FOR
AC
COIL
UNIT---------..
.052
±.001
OIA!TYPl
LOCATING
PIN
FOR
DC
COIL
UNIT
.052 ±.001
DIA!TYPl
.281
1_437 _
__,_/
FOR
IDENTIFICATION
PURPOSES,
TERMINAL
X1
GLASS
BEAD
TO
BE
1.140
MAX
OF
CONTRASTING
COLOR
WITH
RESPECT
/
TO
OTHER
TERMINAL
BEADS
1.359
1.047
MAX
±.001
DIA
-
12
PINS
.040 ±.001
DIA
- 2
COIL
PINS
----.144
±.005
DIA
- 4
HOLES
INCH-POUND
MS27254H
27 November 2003
SUPERSEDING
MS27254G
10 Feb 1989
DETAIL SPECIFICATION SHEET
RELAYS, EL ECTROMAGNETIC, 10 AMPERES, 4 PDT
TYPE I, PLUG-I N, HERMETICALLY SEALED
INACTIVE FOR NEW DESIGN AFTER 5 JUNE 1987. NO
SUPERSEDING SPECI FICATION. 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 requirem ents for acquiring the relay described herein shall
consist of this specification and the l atest issue of MIL-PRF-6106.
FIGURE 1. Dim ensi ons and conf igurati on.
AMSC N/A 1 of 5 FSC 5945
.734
:t.004
......
--+--.524
:t.004
.362~~~~~-.314
:t.004
.315
.157
D3~
D1o------A
~
D2
C3~
C 1
o------A
I
CZ
B3~
B 1
o------A
I
BZ
A3~
:~~
A2
xzo---lJ
CIRCUIT
-2
D3~
D1o------A
~
D2
C3~
C 1
o------A
I
CZ
B3~
B 1
o------A
I
BZ
A3~
:~~
AZ
xz~
CIRCUIT
-1
SEE
NOTE
6
MS27254H
Inches mm Inches mm Inches mm
.001 0.03 .156 3.96 .630 16.00
.002 0.05 .157 3.99 .734 18.64
.004 0.10 .210 5.33 .921 23.39
.005 0.13 .230 5.84 1.047 27.38
.031 0.79 .281 7.14 1.078 28.58
.040 1.02 .314 7.98 1.140 28.96
.047 1.19 .315 8.00 1.359 34.52
.062 1.57 .362 9.19 1.437 36.50
.105 2.67 .420 10.67
.144 3.66 .524 13.31
NOTES:
1. Dimensions are in inc hes.
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 suit able legible circuit
diagram that identifies each terminal location specified.
5. Pins to be perpendicular to header wi thi n one i nch.
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 ci t ed herein, the text of this standard
shall take precedence.
8. Referen ced Gov ernment do cuments of the iss ue lis ted in t ha t issu e of t he Depa rt ment of D efens e Ind ex of
specifications and standards (DoDI SS) specifi ed in the soli citation form a part of this specific ation to the extent
specified herein.
9. Gas ket sh al l provid e a rel iab le sea l betw een th e relay and mating s ock et that will meet t he en vironmental,
operat ional, and interface requirem ents 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 - Conti nued.
2
MS27254H
TABLE I. Dash numbers and characteristics.
Dash number
MS27254- Type Coil Terminal type Max
weight
in pounds
1 I ac Plug-in .20
2 I dc Plug-in .20
TABLE II. Operating characteristics.
Part no.
MS
Coil data Time - (milliseconds maximum)
Co il Nominal Max Max pick-up voltage Hold Drop Oper Rel- Contact Bounce
27254- Ω Cont vol- out
volt- -ate ease Main Aux
Volts
1/ Freq
Hz Res Volts Amp Nor-
mal
2/
High
temp
test
cur-
rent
test
tage
2/ age
2/
3/ 4/ 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 --- ---
1/ Caution: Use of any coil v olta ge l ess than nomi n al coil v olta g e will com pr omis e th e operation of the rela y .
2/ Ove r the te mperature range .
3/ With n omina l coil vo ltag e.
4/ From n omi nal co il voltag e.
TABLE III. Rated contact load (amperes per pole) (case grounded).
T yp e of l oad
Life
operat
ing
cycl es
3
x 10
28 V dc 11 5 V ac, 1 ph as e 115/200 V ac, 3 phase 1/ See
appro
priate
notes
Main Aux Main Aux Main Aux
NO NC NO NC 400
Hz 60
Hz 400
Hz 60
Hz 400
Hz 60
Hz 400
Hz 60
Hz
Resistive 100 10 10 10 10
Inductive 50 10 10 10 10
Inductive
Motor 100 5 5 5 5 2/
Lamp 100 3 3 3 3 2/
Transfer load 3/
Mechanical life
reduced
current 400 2.5 2.5
Mixed l oads 10 0 App licabl e per s pecif ication
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 r elay is suitable for transfer between unsynchronized ac power supplies at rating indicated.
3
Env i ronmental ch ara c teristics:
Temperature range: -70°C to +125°C.
Maximum altitude rati ng: 80,000 feet.
Shock g-le vel: 25 g’s.
Duration: 11 ms.
Max duration contact opening: 10 µs.
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 re sistance, initial : 100 megohms.
After life or e n viron me ntal tests: 50 me g ohms.
Dielectric strength (sea level):
Coil to case
Aux cont act s
All other points
Dielectric strength (altitude):
Coil to case
Aux cont act s
All other points
MS27254H
Initial
After life tests
1,000 V rms 1,000 V r ms
N/A N/A
1,500 V rms 1,125 V rms
Initial After life tests
N/A 250 V rms
N/A
N/A 350 V rms
4
MS27254H
Maximum contact drop initial: 0.150 volt.
After life test: 0.175 volt.
Overload current: 40 am peres dc, 60 amperes ac.
Rupture current: 50 am peres 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 t ests are not applicable.
Group A acceptance reports shall be submitted to the quali f ying activity on a yearl y basis in order to retain
qualification for this military spe ci fication she et.
Qualification by similarity: See MIL-PRF-6106.
NOTES
Referenced documents. In addition to MIL-PRF-6106, this specification sheet references the following documents.
( Government doc uments are available on lin e at http://assist.daps.dla.mil/quicksearch or www .dodssp.daps.mil or
from the Standard iz ation Docum ent Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094).
Soc iety of A utomo tive En gineer s d oc uments are a va ilable f rom the Society o f Aut omotive Engin eers 400
Commonwealth Drive Warrendale, Pennsylvania, United States, 15096-0001. http://www.sae.org
STANDARDS
Departm ent of Defense
MIL-STD-461 - Requirem ents for the Control of Electromagneti c Interference Characteristics of
Subsys tems and E quipment
Soci ety of Automoti v e Engineers ( SAE)
SAE-AMS3332 - Sili c one Rubber Extr eme Low-Temperature Resistant, 15-30
Custodians : Preparing activity:
NAVY - AS DLA - CC
Air Force - 11
DLA - CC ( Pr oject 5945-1221-17)
Review activities:
Navy - EC
NOT E: The activit ies l isted abov e wer e interested in this d ocument as of the date of t his d ocument. S ince
organizations and responsibilities can change, you should verify the currency of the information above using ASSIST
Online database at www.dodssp.daps.mil.
5
