
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Pushbutton Switches
.320
(8,13)
.410 (10,41)
MAX.
.162
(4,11)
DIM "A"
.200
(5,08)
.024
(0,61)
.075
(1,91)
.030
(0,76)
.289
(7,34)
.105 (2,67)
TYP.
.200.010
(5,080,25)
.020 (0,51)
TYP.
.180 (4,57)
DIA.
.100 (2,54)
DIA.
C
L
.125
(3,18)
.125
(3,18)
.024
(0,61)
.162
(4,11)
.289
(7,34)
DIM "A"
"A"
.100
(2,54)
.200.010
(5,080,25)
.200
(5.08)
.320
(8.13)
90˚
.105
(2,67)
TYP.
.075
(1,91)
.410 (10,41)
MAX.
1 2 3
.030
(0,76)
TERMINAL ID
38BC
Butt Contact Pushbutton Switches
SERIES 38BM AND 38BC
Sub-Miniature Surface Mount
FEATURES
•SurfaceMountProcessCompatible
•SealedConstruction
•SPSTandSPDT,MomentaryContact
•ExtendedorFlushPlunger
•Drop-InReplacementforIndustryStandard
SPECIFICATIONS
PC Mounting
Rating Criteria
Operating Life:80,000make-and-breakcycles
atfullload
Contact Rating (resistive load):
Gold Contacts:0.4VAmaximumat20Vacor
Vdcmaximum
Silver Contacts: I.O. Amps maximum at 120
Vacor28Vdc
Contact Resistance:Below20milliohmstypical
initialat2-4Vdc,100mA
Insulation Resistance:1000megaohmsmin.
Voltage Breakdown:1000Vrmsminimumat
sealevel
Operating Temperature:-30°Cto+85°C
Solderability: Per MIL-STD-202F, Method
208D,orEIARS-186EMethod9(1hoursteam
aging)
.070
(1,78)
.040
(1,02)
TYP.
.143
(3,63)
TYP.
.128
(3,25)
TYP.
.080(2,03)
TYP.
.040
(1,02)
TYP.
.080
(2,03)
.368
(9,35)
.150(3,81)
TYP.
TERMINALPADS
.040
(1.02)
STANDOFFPADS
.070
(1.78)
.368
(9.35)
.080(2,03)
.128(3,25)
.040
(1.02)
.150
(3.81)
.080
(2,03)
.143
(6.63)
DIMENSIONS ininches(andmillimeters)
Materials and Finishes
Base and Cover:Thermoplastic(UL94V-0)
Plunger: Thermoplastic (UL 94V-0), with
standardinternalo-ringseal
Terminals:Copperalloy,goldplateovernickel
plate
Spring:PlatedMusicWire
Contact System: Copperalloy,goldorsilver
plate(asspecied)overnickelplate
Switch Support:Brass,tin-plated
SPST
SPDT
38BM