Butt Contact Pushbutton Switches
SerieS 38Bt and 38BH
Sub-Miniature Horizontal PC Mount
FeatureS
• Drop-In Replacement for Industry Standard
• Sealed Plunger Option
• Printed Circuit Board Mount
• SPST and SPDT, Momentary Contact
diMenSiOnS
in inches (and millimeters)
38Bt
.249
(6,32)
C
L
.125
(3,18)
.215
(5,46)
.162
(4,11)
.025
(0,64) .130
(3,30)
.100 (2,54)
DIA.
.030
(0,76)
TYP.
.200
(5,08)
.125
(3,18)
.180 (4,57) .165 (4,19)
DIA.
.015 (0,38) TYP.
.200
(5,08)
.200
(5,08)
.030 (0,76) TYP.
.200 (5,08)
.020
(0,51)
TYP.
.200
(5,08)
.320 (8,13)
PC Mounting
.043 (1,09)
DIA. TYP.
C
L
Pushbutton Switches
SPSt
38BH
C
L
DIM. "A"
.162
(4.11)
.025
(0.64)
.130
(3.30)
.320
(8.13)
.200
(5.08)
.043 (1.09)
DIA. TYP.
PC Mounting
.100
(2.54)
TYP.
.249
(6.32)
C
L
.030
(0.76)
TYP.
.200
(5.08)
.180
.125
.100
(4.57) (3.18)
(2.54)
DIA.
DIA.
1
2
3
.165
(4.19)
.015
(0.38)
TYP.
SPdt
.030
(0.76)
TYP.
.200
(5.08)
.020
(0.51)
TYP.
TERMINAL
IDENT-
IFICATION
.200
(5.08)
.200
(5.08)
SPeCiFiCatiOnS
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: 1.0 Amp maximum at 120 Vac
or 28 Vdc
Contact resistance: Below 20 milliohms 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)
Unless otherwise indicated, tolerances are ± .010 (0,25)
Materials and Finishes
Base and Cover: Thermoplastic (UL 94V-0)
Plunger:
Thermoplastic (UL 94V-0), (S versions
include an internal o-ring seal)
terminals: Copper alloy, gold or silver plate (as
specified) over nickel plate
Spring: Plated Music Wire
Contact System:
Copper alloy, gold or silver
plate (as specified) over nickel plate
Switch Support: Brass, tin-plated
CirCuitry
OrderinG inFOrMatiOn
38BX-4-H-3-n
Series: 38BT = SPST, Momentary, Thru Hole
Series: 38BH = SPDT, Momentary, Thru Hole
dimension a: 0 = 0.020" 4 = 0.215"
Seal:
S = O-Ring Seal, N = No 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.
COMM
TERM. 2
N.C.
TERM. 1
N.O.
TERM. 3
SPdt–n.O.
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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