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
•SurfaceMountProcessCompatible
•SealedConstruction
•SPSTandSPDT,MomentaryContact
•ExtendedorFlushPlunger
•Drop-InReplacementforIndustryStandard
SPECIFICATIONS
PC Mounting
Rating Criteria
Operating Life:80,000make-and-breakcycles
atfullload
Contact Rating (resistive load):
Gold Contacts:0.4VAmaximumat20Vacor
Vdcmaximum
Silver Contacts: I.O. Amps maximum at 120
Vacor28Vdc
Contact Resistance:Below20milliohmstypical
initialat2-4Vdc,100mA
Insulation Resistance:1000megaohmsmin.
Voltage Breakdown:1000Vrmsminimumat
sealevel
Operating Temperature:-30°Cto+85°C
Solderability: Per MIL-STD-202F, Method
208D,orEIARS-186EMethod9(1hoursteam
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.
TERMINALPADS
.040
(1.02)
STANDOFFPADS
.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 ininches(andmillimeters)
Materials and Finishes
Base and Cover:Thermoplastic(UL94V-0)
Plunger: Thermoplastic (UL 94V-0), with
standardinternalo-ringseal
Terminals:Copperalloy,goldplateovernickel
plate
Spring:PlatedMusicWire
Contact System: Copperalloy,goldorsilver
plate(asspecied)overnickelplate
Switch Support:Brass,tin-plated
SPST
SPDT
38BM
Pushbutton Switches
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Butt Contact Pushbutton Switches
Series:38BM=SPST,Momentary,SurfaceMount
38BC=SPDT,Momentary,SurfaceMount

Dimension "A":
0=0.020"4=0.215"
38BX-0-H-3-S
Seal:S=O-RingSeal
Contact Material:
1=SolderDipoverGold
2=SolderDipoverSilver
3=Gold-RoHSCompliant
4=Silver-RoHSCompliant
Orientation:
H=HorizontaltoPCB
SPST N.O.
SPST–N.O.
CIRCUITRY TAPE AND REEL PACKAGING
ORDERING INFORMATION
SPDT–N.O.
N.O.
TERM.3
N.C.
TERM.1
COMM
TERM.2
SERIES 38BM AND 38BC
Sub-Miniature Surface Mount
38BM-4-H-1-S
SHOWN FOR
REFERENCE
ONLY
SWITCHES AND COVER TAPE
NOT SHOWN FOR CLARITY
1.260±.012
(32.00±
0.3MM)
13
INCH
REEL
.630±.004
(16.00±0.1MM)
POCKET
CENTER
LINES
DIRECTION
OF FEED
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Grayhill:
38BC-0-H-3-S 38BC-4-H-3-S 38BM-4-H-3-S 38BM-4-H-4-S 38BM-0-H-2-S 38BM1-550 38BC-4-H-4-S 38BC2-550
38BC0-550 38BM-4-H-1-S 38BC-0-H-1-S 38BM0-550 38BM-0-H-4-S 38BC-4-H-1-S 38BM-0-H-3-S 38BM2-550
38BM3-550 38BC1-550 38BM-0-H-1-S