
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Pushbutton Switches
Butt Contact Pushbutton Switches
123
C
L
C
L
.320
(8.13)
.200
(5.08)
.020
(0.51)
TYP.
.162
(4.11)
DIM."A"
.180
(4.57)
DIA.
.100
(2.54)
DIA.
.165
(4.19)
.015
(0.38)
TYP.
.200
(5.08)
.030
(0.76)
TYP.
.130
(3.30)
.025
(0.64)
.125
(3.18)
.030
(0.76)
TYP.
.200
(5.08)
.249
(6.32)
TERMINAL
IDENT-
IFICATION
.200
(5.08)
.200
(5.08)
.100
(2.54)
TYP.
.043(1.09)
DIA.TYP.
Series:38BT=SPST,Momentary,ThruHole
Series:38BH=SPDT,Momentary,ThruHole
Dimension A:0=0.020"4=0.215"
38BX-4-H-3-N
Seal: S=O-RingSeal,N=NoSeal
Contact Material:1=SolderDipoverGold
2=SolderDipoverSilver
3=Gold-RoHSCompliant
4=Silver-RoHSCompliant
Orientation:H=HorizontaltoPCB
38BH
38BT
.249
(6,32)
.200
(5,08)
.030
(0,76)
TYP.
.162
(4,11)
.215
(5,46)
.025
(0,64)
.030(0,76)TYP.
.200(5,08)
.165(4,19)
.015(0,38)TYP.
.200
(5,08)
.320(8,13)
.020
(0,51)
TYP.
.200
(5,08)
.200
(5,08)
.043(1,09)
DIA.TYP.
.130
(3,30)
.180(4,57)
DIA.
.100(2,54)
DIA.
C
L
C
L
.125
(3,18)
.125
(3,18)
Unlessotherwiseindicated,tolerancesare±.010(0,25)
PC Mounting
SPECIFICATIONS
Rating Criteria
Operating Life:80,000make-and-breakcycles
atfullload
Contact Rating (resistive load):
Gold Contacts:0.4VAmaximumat20Vacor
Vdcmaximum
Silver Contacts:1.0Ampmaximumat120Vac
or28Vdc
Contact Resistance:Below20milliohmstypical
initialat2-4Vdc,100mA
Insulation Resistance: 1000 megaohms
min.
Voltage Breakdown:1000Vrmsminimumat
sealevel
Operating Temperature:-30°C.to+85°C.
Solderability: Per MIL-STD-202F, Method
208D,orEIARS-186EMethod9(1hoursteam
aging)
Materials and Finishes
Base and Cover:Thermoplastic(UL94V-0)
Plunger:Thermoplastic(UL94V-0),(Sversions
includeaninternalo-ringseal)
Terminals:Copperalloy,goldorsilverplate(as
specied)overnickelplate
Spring:PlatedMusicWire
Contact System:Copperalloy,goldorsilver
plate(asspecied)overnickelplate
Switch Support:Brass,tin-plated
CIRCUITRY
SPST–N.O.
ORDERING INFORMATION
DIMENSIONS ininches(andmillimeters)
SERIES 38BT and 38BH
Sub-Miniature Horizontal PC Mount
FEATURES
•Drop-InReplacementforIndustryStandard
•SealedPlungerOption
•PrintedCircuitBoardMount
•SPSTandSPDT,MomentaryContact
SPST
SPDT
PC Mounting
SPDT–N.O.
N.O.
TERM.3
N.C.
TERM.1
COMM
TERM.2