Pushbutton Switches
Butt Contact Pushbutton Switches
SerieS 38BM and 38BC
Sub-Miniature Surface Mount
FeatureS
Surface Mount Process Compatible
Sealed Constr uction
SPST and SPDT, Momentar y Contact
Extended or Flush Plunger
Drop-In Replacement for Industr y Standard
SPeCiFiCatiOnS
diMenSiOnS in inches (and millimeters)
38BM
PC Mounting
.320 .162 .105 (2,67) .070
(8,13) (4,11) TYP. (1,78)
DIM
.040
.040
.128
.143 (1,02)
(1,02)
(3,25)
(3,63) TYP.
TYP.
.200 TYP.
TYP.
C
L (5,08) .024
(0,61)
.020 (0,51)
.075 .368
.100 (2,54) .080
.080 (2,03)
.030
TYP.
.410 (10,41) (1,91) (9,35)
DIA. (2,03)
TYP.
(0,76)
MAX.
.125
.180 (4,57) .289
.200.010
(3,18)
DIA. (7,34)
(5,080,25)
SPSt
.150 (3,81)
TYP.
.320
38BC
(8.13)
STANDOFF PADS
.200.010
.105
.070
(5,080,25)
(2,67)
(1.78)
.040
TYP.
(1.02)
.162
.100 .143
(6.63)
(4,11) (2,54)
.125
(3,18)
.024
90
(0,61)
.080
.200
.128 (3,25) (2,03)
.368
(5.08)
(9.35)
.080 (2,03)
.150
(3.81)
TERMINAL ID
1 2 3
.030
(0,76) .410 (10,41)
.075
.040
DIM (1.02)
(1,91) MAX.
.289 TERMINAL PADS
SPdt
(7,34)
rating Criteria Materials and Finishes
Base and Cover: Ther moplastic (UL 94V-0)
Operating Life: 80,000 make-and-break cycles
at full load Plunger: T h e r m o p l a s t i c ( U L 9 4 V- 0 ) , w i t h
Contact rating (resistive load): standard inter nal o-r ing seal
Gold Contacts : 0.4 VA maximum at 20 Vac or t erminals: Copper alloy, gold plate over nickel
Vdc maximum plate
Spring: Plated Music Wire
Silver Contacts: I.O. Amps maximum at 120
Vac or 28 Vdc Contact System: Copper alloy, gold or silver
Contact resistance: Below 20 milliohms typical plate (as specified) over nickel plate
initial at 2-4 Vdc, 100 mA Switch Support: Brass, tin-plated
insulation resistance: 1000 megaohms min.
Voltage Breakdown: 1000 Vr ms minimum at
sea level
Operating t emperature: -30C to +85C
Solderability: Pe r M I L - S T D - 2 0 2 F, M e t h o d
208D, or EIA RS-186E Method 9 (1 hour steam
aging)
Grayhill, Inc. 561 Hillgrove Avenue LaGrange, Illinois 60525-5997 USA Phone: 708-354-1040 Fax: 708-354-2820 www.grayhill.comPushbutton Switches
Butt Contact Pushbutton Switches
SerieS 38BM and 38BC
Sub-Miniature Surface Mount
CirCuitry taPe and reeL P aCKaGinG
SWITCHES AND COVER TAPE
NOT SHOWN FOR CLARITY
DIRECTION
OF FEED
SPSt n.O.
SPStn.O.
1.260.012
(32.00
0.3MM)
N.C.
.630.004
TERM. 1
COMM
(16.000.1MM)
13
TERM. 2
POCKET
38BM-4-H-1-S INCH
N.O.
CENTER
SHOWN FOR REEL
TERM. 3
LINES
REFERENCE
SPdtn.O. ONLY
OrderinG inFOrMatiOn
Series: 38BM = SPST, Momentar y, Surface Mount
38BC = SPDT, Momentar y, Surface Mount
dimension:
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 = Hor izontal to PCB
Grayhill, Inc. 561 Hillgrove Avenue LaGrange, Illinois 60525-5997 USA Phone: 708-354-1040 Fax: 708-354-2820 www.grayhill.com