Sealed Surface Mount Subminiature Pushbutton Switches
SERIES 38B AND 38H
Sealed Surface Mount Subminiature
Pushbutton Switches
FEATURES
•
Surface Mount Process Compatible
•
Sealed Construction
•
Solder-Coated Terminals
•
Tape and Reel Packaging
•
SPST and SPDT Momentary Contact
SERIES 38B
DIMENSIONS
In inches (and millimeters)
38BM
.320
(8,13)
DIM "A"
.162
(4,11)
.105 (2,67)
TYP.
PC Mounting
.070
(1,78)
.040
(1,02) .143
TYP. (3,63)
TYP.
.040
.128
(1,02)
(3,25)
TYP.
TYP.
Pushbutton Switches
C
L
.100 (2,54)
DIA.
.180 (4,57)
DIA.
.125
(3,18)
.075
(1,91)
.289
(7,34)
.200
(5,08)
.024
(0,61)
.020 (0,51)
TYP.
.200±.010
(5,08±0,25)
.410 (10,41)
MAX.
.030
(0,76)
.368 .080
(9,35) (2,03)
SPST
.080 (2,03)
TYP.
38BC
.125
(3,18)
.162
(4,11)
.024
(0,61)
.200±.010
(5,08±0,25)
.100
(2,54)
90˚
.320
(8.13)
.105
(2,67)
TYP.
.040
(1.02)
.150 (3,81)
TYP.
STANDOFF PADS
.070
(1.78)
.143
(6.63)
.200
(5.08)
1
2
3
TERMINAL
.368 .128 (3,25)
(9.35)
.080 (2,03)
ID
.080
(2,03)
.150
(3.81)
SPDT
DIM "A"
.075
(1,91)
.030
(0,76)
.289
(7,34)
"A"
SOLDER
DIP AREA
.410 (10,41)
MAX.
.040
(1.02)
TERMINAL PADS
Circuitry
SPST
MODEL NO.
WSP9
SWITCH POSITION
OFF
(ON)
MODEL NO.
WSP8
TERM. COMM.
SPDT
SWITCH POSITION
ON
(ON)
2-3
2-1
()=MOMENTARY
SCHEMATIC
()=MOMENTARY
2COMM.
SCHEMATIC
N.C.1
3 N.O.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
1
Sealed Surface Mount Subminiature Pushbutton Switches
SERIES 38B
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
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)
Materials and Finishes
Base and Cover:
Thermoplastic (UL 94V-0)
Plunger:
Thermoplastic (UL 94V-0), with
standard internal o-ring seal
Terminals:
Copper alloy, solder plate over
nickel plate, solder-coated
Spring:
Plated Music Wire
Contact System:
Copper alloy, gold plate over
nickel plate, solder-coated
Switch Support:
Brass, tin-plated
Available from your local Grayhill Distributor.
For prices and discounts, contact a local Sales
Office, an authorized local Distributor or Grayhill.
ORDERING INFORMATION
Pushbutton Switches
Series:
38BM = SPST, Momentary, Surface Mount
38BC = SPDT, Momentary, Surface Mount
Dimension "A":
0 = 0.020" 4 = 0.215"
38BX-0-H-1-S
Seal:
S = O-Ring Seal
Contact Material:
1 = Gold
Orientation:
H = Horizontal to PCB
SERIES 38H
DIMENSIONS
M7
.548
(9,30)
EPOXY SEAL
.420
(7,10)
In inches (and millimeters)
.342
(5,80)
Ø.177
(Ø4,50)
Ø.102
(Ø2,60)
.242
(4,10)
.177
(3,00)
.242
(4,10)
.045
(0,76)
.030
(0,50)
.300
(5,08)
.024
(0,40)
.325
(5,50)
SPST
.125
(3,18)
.173
(4,39)
.079
(2,00)
.221
(5,60)
.063
(1,60)
.120
(3,00)
.325
(8,27)
.125
(3,18)
.561
(14,25)
2
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
E-8
Sealed Surface Mount Subminiature Pushbutton Switches
SERIES 38H
DIMENSIONS
M7
.161
(4,10)
Ø.177
(Ø4,50)
Ø.102
(Ø2,60)
.228
(5,80)
.020
(0,50)
.118
(3,00)
.030
(0,76)
.100
(2,54)
In inches (and millimeters)
.366
(9,30)
EPOXY SEAL
.161
(4,10)
.280
(7,10)
.217
(5,50)
.016
(0,40)
SPDT
.173
(4,39)
Pushbutton Switches
.125
(3,18)
.079
(2,00)
.221
(5,60)
.100
(2,54)
.120
(3,00)
.325
(8,27)
.125
(3,18)
.561
(14,25)
.063
(1,60)
S6
.228
(5,80)
.319
(8,10)
.226
(5,75)
.102
(2,60)
.161
(4,10)
EPOXY SEAL
.161
(4,10)
.280
(7,10)
Ø.177
(Ø4,50)
.142
(3,60)
.016
(0,40)
.353
(8,97)
.143
(3,63)
.040
(1,02)
.030
(0,76)
.020
(0,50)
.200
(5,08)
SPST
.128
(3,25)
.080
(2,03)
.421
(10,70)
.079
(2,00)
.032
(0,80)
.200
(5,08)
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
3
Sealed Surface Mount Subminiature Pushbutton Switches
SERIES 38H
DIMENSIONS
S6
In inches (and millimeters)
.228
(5,80)
.319
(8,10)
.226
(5,75)
.102
(2,60)
.161
(4,10)
EPOXY SEAL
.161
(4,10)
.280
(7,10)
Ø.177
(Ø4,50)
.142
(3,60)
.016
(0,40)
.353
(8,97)
.030
(0,76)
.020
(0,50)
.100
(2,54)
.143
(3,63)
.040
(1,02)
Pushbutton Switches
SPDT
.128
(3,25)
.080
(2,03)
.421
(10,70)
.079
(2,00)
.032
(0,80)
.100
(2,54)
Circuitry
SPST
MODEL NO.
WSP9
SWITCH POSITION
OFF
(ON)
MODEL NO.
WSP8
TERM. COMM.
SPDT
SWITCH POSITION
ON
(ON)
2-3
2-1
()=MOMENTARY
SCHEMATIC
()=MOMENTARY
2COMM.
SCHEMATIC
N.C.1
3 N.O.
4
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Sealed Surface Mount Subminiature Pushbutton Switches
SERIES 38H
SPECIFICATIONS
Rating Criteria
Operating Life:
50,000 make-and-break cycles
at full load
Contact Rating (resistive load):
R Option: 0.4 VA maximum at 20 Vac or Vdc
maximum
Q & G Options: 1A max at 125 Vac or 28 Vdc
Contact Resistance:
Below 20 milliohms typical
initial at 2-4 Vdc, 100 mA
Insulation Resistance:
1000 megaohms
minimum
Voltage Breakdown:
1500 Vrms minimum at
sea level
Operating Temperature:
-30°C. to +85°C.
Spring:
Plated Music Wire
Contact System:
Copper alloy
Switch Support:
Brass, tin-plated
Materials and Finishes
Case:
Glass Filled Nylon 4/6, UL94V-)
Plunger:
Thermoplastic Polyester(UL 94V-0)
(with internal o-ring seal)
Terminals:
Copper alloy
ORDERING INFORMATION
SERIES
38H
Sealed
Surface Mount
Subminiature
Pushbutton
Switches
MODEL NO.
WSP8
Options:
WSP8,
WSP9
(see models
for
switching
positions)
TERMINATION
M7
Options:
M7, S6
(see
termination
options)
CONTACT
R
R = Copper
alloy, gold
plate over
nickel plate.
G=Copper
alloy, Gold
plate over
silver plate
Q= Copper
alloy, Silver
Plate
SEAL
E
E = Epoxy
seal
Pushbutton Switches
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
5