underꢀfileꢀnumberꢀE35289.TheꢀULꢀratingꢀforꢀtheꢀ
GeneralRating:Thisꢀratingꢀisꢀbasedꢀonꢀstandardꢀ
Multi-Deck Rotary Switches
MILIꢁARꢂ QuALIFIED
theꢀ followingꢀ pages.ꢀ Standardꢀ variationsꢀ suchꢀ
asꢀterminals,ꢀshaftꢀand/orꢀbushingꢀlengthꢀetc.,ꢀ
whichꢀdoꢀnotꢀaffectꢀperformance,ꢀcanꢀbeꢀmarkedꢀ
asꢀ qualifiedꢀ product.ꢀ Adjustableꢀ stopsꢀ cannotꢀ
beꢀqualified.ꢀContactꢀGrayhillꢀforꢀdetailsꢀaboutꢀ
variations.
specificallyꢀ SR04-2.ꢀ Unsealedꢀ switchesꢀ areꢀ
qualifiedꢀ forꢀ -65°Cꢀ toꢀ 85°Cꢀ inꢀ 30°,ꢀ 36°,ꢀ 45°,ꢀ
60°ꢀandꢀ90°ꢀthrows.ꢀTheꢀstandardꢀandꢀmilitaryꢀ
stylesꢀofꢀtheꢀconcentricꢀswitchesꢀhaveꢀtheꢀsameꢀ
dimensionsꢀwithꢀtheꢀexceptionꢀofꢀtheꢀlocationꢀofꢀ
theꢀ3ꢀpoleꢀcommonꢀ(seeꢀcircuitꢀdiagrams).ꢀTheꢀ
30°ꢀandꢀ36°ꢀthrowsꢀareꢀdescribedꢀinꢀtheꢀorderingꢀ
information.ꢀIfꢀtheꢀ45°,ꢀ60°ꢀandꢀ90°ꢀthrowsꢀareꢀ
required,ꢀtheyꢀcanꢀbeꢀprovidedꢀinꢀSectionꢀAꢀofꢀ
theꢀSeriesꢀ54ꢀRotaryꢀSwitches;ꢀseeꢀStandardꢀ
Options,ꢀpageꢀJ-9.
Single Shaft Switches
Theꢀ militaryꢀ stylesꢀ ofꢀ theꢀ singleꢀ shaftꢀ Seriesꢀ
42ꢀandꢀ44ꢀrotaryꢀswitchesꢀareꢀqualifiedꢀtoꢀMIL-
DTL-3786/4,ꢀspecificallyꢀSR04-1.ꢀQualificationꢀ
includesꢀ twoꢀ temperatureꢀ ranges.ꢀ Unsealedꢀ
stylesꢀM,ꢀMB,ꢀMGꢀandꢀMBGꢀareꢀqualifiedꢀforꢀ-65ꢀ
toꢀ85°C.ꢀUnsealedꢀstylesꢀH,ꢀHB,ꢀHGꢀandꢀHBG,ꢀ
plusꢀsealedꢀstylesꢀHS,ꢀHBS,ꢀHGSꢀandꢀHBGSꢀ
areꢀqualifiedꢀforꢀ-65°Cꢀtoꢀ125°C.ꢀQualificationꢀ
includesꢀlowꢀlevelꢀswitchingꢀandꢀshaftꢀgroundingꢀ
asꢀ specifiedꢀ inꢀ MIL-DTL-3786.ꢀ Qualificationꢀ
includesꢀ30°,ꢀ36°,ꢀ45°,ꢀ60°ꢀandꢀ90°ꢀanglesꢀofꢀthrowꢀ
withꢀsolderꢀlugꢀterminals.ꢀTheꢀmilitaryꢀstylesꢀareꢀ
dimensionallyꢀtheꢀsameꢀasꢀtheꢀstandardꢀstylesꢀ
withꢀtwoꢀexceptions.ꢀTheꢀlocationꢀofꢀtheꢀcommonꢀ
forꢀtheꢀ3-poleꢀswitchꢀdiffersꢀ(seeꢀcircuitꢀdiagrams)ꢀ
andꢀtheꢀnon-turnꢀtabꢀforꢀstylesꢀHS,ꢀHBS,ꢀHGSꢀ
andꢀHBGSꢀdiffersꢀperꢀtheꢀShaftꢀandꢀPanelꢀSealꢀ
descriptionꢀfollowing.
Militaryꢀqualifiedꢀswitchesꢀmayꢀbeꢀorderedꢀbyꢀtheꢀ
militaryꢀMꢀnumberꢀlistedꢀinꢀMIL-DTL-3786/4ꢀorꢀ
byꢀtheꢀGrayhillꢀpartꢀnumber.ꢀTheyꢀwillꢀbeꢀmarkedꢀ
toꢀspecifications.
Add-A-Pot Switches
MILIꢁARꢂ QuALIFIED SHAFꢁ AND
PANEL SEAL:
Styles HS, HBS, HGS and HBGS
Theꢀshaftꢀisꢀsealedꢀtoꢀtheꢀbushingꢀbyꢀanꢀinternalꢀ
O-ringꢀperꢀMIL-P-5516B.ꢀTheꢀbushingꢀisꢀsealedꢀ
toꢀtheꢀpanelꢀwithꢀaꢀsiliconeꢀrubberꢀwasherꢀandꢀ
aꢀstainlessꢀsteelꢀbackingꢀwasher.ꢀTheꢀcombinedꢀ
uncompressedꢀthicknessꢀisꢀ0.055"ꢀ(1,40).ꢀSinceꢀ
thisꢀswitchꢀhasꢀaꢀflatꢀcover,ꢀaꢀnon-turnꢀwasherꢀisꢀ
suppliedꢀ(seeꢀPanelꢀSealꢀKit).ꢀIfꢀusingꢀit,ꢀmountꢀ
itꢀinꢀfrontꢀofꢀtheꢀpanel.ꢀ
Theꢀ militaryꢀ styleꢀ ofꢀ theꢀ add-a-potꢀ Seriesꢀ 54ꢀ
switchꢀisꢀqualifiedꢀtoꢀMIL-DTL-3786/4,ꢀspecificallyꢀ
SR04-3.ꢀTheseꢀunsealedꢀswitchesꢀareꢀqualifiedꢀ
forꢀ-65°Cꢀtoꢀ85°Cꢀinꢀ30°,ꢀ45°,ꢀ60°ꢀandꢀ90°ꢀthrows.ꢀ
Theꢀdimensionsꢀofꢀtheꢀmilitaryꢀstyleꢀadd-a-potꢀ
switchesꢀareꢀnotꢀtheꢀsameꢀasꢀtheꢀstandardꢀadd-
a-potꢀswitches;ꢀseeꢀdrawings.
ꢁwo Switches, Concentric Shafts
TheꢀMꢀstyleꢀofꢀtheꢀconcentricꢀshaftꢀSeriesꢀ43ꢀ
andꢀ54ꢀswitchesꢀisꢀqualifiedꢀtoꢀMIL-DTL-3786/4,ꢀ
All Qꢀalified Switches
Completeꢀelectricalꢀratingsꢀandꢀcharacteristicsꢀ
forꢀallꢀofꢀtheseꢀqualifiedꢀswitchesꢀareꢀlistedꢀonꢀ
SPECIFICAꢁIONS:
Electrical Ratings
Overload: 50ꢀ operationsꢀ atꢀ 150%ꢀ ratedꢀ ACꢀ Voltage and Load:ꢀAsꢀlistedꢀinꢀtheꢀchart
load
Oneꢀcycleꢀisꢀ360°ꢀrotationꢀandꢀaꢀreturnꢀthroughꢀ
Standard Style
Rated: Toꢀ makeꢀ andꢀ breakꢀ theꢀ followingꢀ
Endꢀrance:ꢀ6000ꢀoperationsꢀatꢀtheꢀratedꢀloadꢀ allꢀswitchꢀpositionsꢀtoꢀtheꢀstartingꢀposition.ꢀTheꢀ
loads:
withꢀ 1000ꢀ Vacꢀ dielectricꢀ strengthꢀ beforeꢀ andꢀ dataꢀforꢀtheꢀcurvesꢀwasꢀmeasuredꢀatꢀseaꢀlevel,ꢀ
Angle of ꢁhrow
afterꢀtest
25°Cꢀandꢀ68%ꢀrelativeꢀhumidity.
30° or 36° 45° or 60°
90°
5ꢀampsꢀ 5ꢀamps
1ꢀampꢀ 2ꢀamps
2ꢀampsꢀ 2ꢀamps
ꢁemperatꢀre Rise:ꢀNotꢀtoꢀexceedꢀ30°Cꢀwhenꢀ
carryingꢀratedꢀACꢀloadꢀafterꢀtest.ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
115ꢀVacꢀresistiveꢀ
6-28ꢀVdcꢀresistiveꢀ
115ꢀVacꢀinductiveꢀ
115ꢀVdcꢀinductiveꢀ
6-28ꢀVdcꢀinductiveꢀ
115ꢀVdcꢀresistiveꢀ
1ꢀampꢀ
1ꢀampꢀ
0.25ꢀampꢀ
0.02ꢀampꢀ
0.10ꢀampꢀ
0.10ꢀampꢀ
TheꢀSeriesꢀ42,ꢀ43,ꢀ44ꢀandꢀ54,ꢀstyleꢀM,ꢀHꢀandꢀ
Note: allꢀdimensionalꢀdrawingsꢀforꢀtheꢀstandardꢀ HSꢀswitchesꢀareꢀmadeꢀtoꢀmeetꢀrequirementsꢀ
styleꢀSeriesꢀ42,ꢀ43,ꢀ44ꢀandꢀ54ꢀalsoꢀapplyꢀtoꢀtheseꢀ ofꢀMIL-DTL-3786,ꢀstyleꢀSR04.ꢀDiallylꢀphthalateꢀ
switches,ꢀwithꢀtheꢀexceptionꢀthatꢀswitchesꢀareꢀ moldedꢀ partsꢀ andꢀ theꢀ designꢀ ofꢀ internalꢀ
—ꢀ
—ꢀ
—ꢀ
—
—
—
ꢀ
Toꢀcarryꢀ10ꢀampsꢀcontinuously.
markedꢀperꢀspecifications.
switchingꢀ elementsꢀ provideꢀ exceptionalꢀ
performance.
Contact Resistance:ꢀ50ꢀmilliohmsꢀmaximum
Insꢀlation Resistance: 1,000ꢀmegaohmsꢀ
minimum
Electrical Ratings
Military Style
Curvesꢀshownꢀareꢀtypicalꢀload-lifeꢀcurvesꢀforꢀ
Seriesꢀ42,ꢀ43,ꢀ44ꢀandꢀ54,ꢀstyleꢀM,ꢀHꢀandꢀHSꢀ
switchesꢀwithꢀ30°ꢀorꢀ36°ꢀanglesꢀofꢀthrow.ꢀTheyꢀ
showꢀtheꢀnumbersꢀofꢀcyclesꢀofꢀrotationalꢀlifeꢀ
expectancyꢀforꢀtheꢀtypesꢀofꢀloadsꢀshown.Thus,ꢀ
withꢀaꢀ5ꢀamp,ꢀ115ꢀVacꢀresistiveꢀload,ꢀ10,000ꢀ
cyclesꢀofꢀlifeꢀisꢀexpected.ꢀIfꢀtheꢀloadꢀisꢀreducedꢀ
toꢀ3ꢀamps,ꢀlifeꢀisꢀincreasedꢀtoꢀ25,000ꢀcycles.Theꢀ
largerꢀanglesꢀofꢀthrowꢀ(45°,ꢀ60°ꢀorꢀ90°)ꢀswitchꢀ
largerꢀcurrentsꢀforꢀaꢀlikeꢀnumberꢀofꢀcycles.
Voltage Breakdown:ꢀ1,000ꢀVacꢀinitiallyꢀ(500ꢀ
Vacꢀorꢀbetterꢀafterꢀmostꢀenvironmentalꢀtests)
Life Expectancy:ꢀ100,000ꢀmechanicalꢀcyclesꢀ
ofꢀ operation.ꢀ Note:ꢀ Actualꢀ lifeꢀ isꢀ determinedꢀ
byꢀ aꢀ numberꢀ ofꢀ factors,ꢀ includingꢀ electricalꢀ
loading,ꢀrateꢀofꢀrotationꢀandꢀenvironment,ꢀasꢀ
wellꢀasꢀmaximumꢀvoltageꢀbreakdownꢀrequiredꢀ
atꢀtheꢀendꢀofꢀlife.
GrayhillꢀtestsꢀofꢀtheꢀMilitaryꢀstyleꢀswitchꢀdoneꢀatꢀ
ambientꢀconditions.ꢀItꢀisꢀprovidedꢀforꢀcomparisonꢀ
toꢀtheꢀStandardꢀStyleꢀswitch.
Chartsꢀshownꢀforꢀnon-shortingꢀcontactsꢀ(breakꢀ
beforeꢀmake)
7
6
5
4
3
2
1
0
VOLTAGEꢀ115ꢀVAC
RESISTIVE
uL Recognition–
Lifeꢀlimitingꢀorꢀfailureꢀcriteriaꢀforꢀtheseꢀcurvesꢀ
are:
Contact Resistance:ꢀ 50ꢀ milliohmsꢀ
maximum
Insꢀlation Resistance: 1,000ꢀ megaohmsꢀ
minimumꢀbetweenꢀmutuallyꢀinsulatedꢀpartsꢀ
Voltage Breakdown: 1,000ꢀ Vacꢀ minimumꢀ
betweenꢀ mutuallyꢀ insulatedꢀ parts.ꢀ Theseꢀ
switchesꢀ willꢀ carryꢀ 10ꢀ ampsꢀ withꢀ maximumꢀ
contactꢀ temperatureꢀ riseꢀ ofꢀ 20°C.ꢀ Lifeꢀ canꢀ
beꢀ predictedꢀ byꢀ Grayhillꢀ ifꢀ lessꢀ criticalꢀ lifeꢀ
characteristics,ꢀ elevatedꢀ temperatureꢀ orꢀ
reducedꢀpressureꢀisꢀinvolved.
Styles uA, uD, uM, uP, uS and uSP
GrayhillꢀstylesꢀAꢀandꢀMꢀandꢀtheirꢀvariationsꢀ(D,ꢀP,ꢀ
SꢀandꢀSP)ꢀofꢀtheꢀSeriesꢀ42,ꢀ43,ꢀ44ꢀandꢀ54ꢀrotaryꢀ
switchesꢀ haveꢀ beenꢀ testedꢀ byꢀ Underwritersꢀ
Laboratories.ꢀTheꢀletterꢀUꢀinꢀtheꢀstyleꢀindicatesꢀ
properꢀmarkingꢀasꢀrequiredꢀbyꢀUnderwritersꢀ
Laboratories.ꢀTheseꢀswitchesꢀareꢀrecognizedꢀ
0
10
25
50
CꢁCLESꢀxꢀ1,000
1.7
1.5
1.2
1.0
.75
.50
.20
0
VOLTAGEꢀ30ꢀVDC
RESISTIVE
Seriesꢀ42,ꢀ43,ꢀ44ꢀandꢀ54ꢀisꢀasꢀfollows:
Electrical Parameters:styleꢀUAꢀ=ꢀ1.0ꢀampereꢀ
atꢀ125ꢀVac.ꢀStyleꢀUMꢀ=ꢀ1.0ꢀampereꢀatꢀ125ꢀVacꢀ
andꢀalsoꢀ.5ꢀampereꢀatꢀ125ꢀVac,ꢀinductiveꢀload,ꢀ
0.75ꢀtoꢀ0.8ꢀpowerꢀfactor.
INDUCTIVE
(2.8ꢀHENRIES)
Ratingꢀbasedꢀonꢀtheꢀfollowingꢀcriteria:
0
10
25
50
MIL-S-3786 Electrical Valꢀes
Military Style
CꢁCLESꢀxꢀ1,000
Grayhill, Inc.
• 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
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