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
38BT
In inches (and millimeters)
C
L
.125
(3,18)
.215
(5,46)
.162
(4,11)
.025
(0,64) .130
(3,30)
.100 (2,54)
DIA.
.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.
.249
(6,32)
C
L
Pushbutton Switches
.030
(0,76)
TYP.
.200
(5,08)
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
1
2
3
.030
(0.76)
TYP.
.200
(5.08)
.180
.125
.100
(4.57) (3.18)
(2.54)
DIA.
DIA.
.165
(4.19)
.015
(0.38)
TYP.
.030
(0.76)
TYP.
.200
(5.08)
.020
(0.51)
TYP.
TERMINAL
IDENT-
IFICATION
.200
(5.08)
.200
(5.08)
SPDT
Unless otherwise indicated, tolerances are ± .010 (0,25)
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
minimum
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)
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
Series:
38BT = SPST, Momentary, Thru Hole
Series:
38BH = SPDT, Momentary, Thru Hole
Dimension A:
0 = 0.020" 4 = 0.215"
38BX-4-H-3-N
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
Available from your local Grayhill Distributor
For prices and discounts, contact a local Sales
Office, an authorized local distributor, or Grayhill.
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
SPST–N.O.
SPST N.O.
COMM
TERM. 2
N.C.
TERM. 1
N.O.
TERM. 3
SPDT–N.O.
Pushbutton
6
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
嵌入式系统
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