Butt Contact Pushbutton Switches
SERIES 38BT and 38BC
Sub-Miniature Vertical PC Mount
FEATURES
• Actuates at Right Angle to Printed Circuit
Board
• Drop-In Replacement for Industry
Standard
• SPST and SPDT, Momentary Contact
• Sealed Plunger Option
DIMENSIONS
38BT
Dim.
A
In inches (and millimeters)
.200
(5,08)
.190 (4,83)
DIA.
.100 (2,54)
DIA.
.200
(5,08)
.320
(8,13)
Pushbutton Switches
SPST
38BC
.180 (4,57)
DIA.
.177
(4,50)
.527 (13,39)
.130 (3,30) TYP.
.020 (0,51)
SQUARE
DIM "A"
.180
(4,57)
DIA.
.527(13,39)
.177
(4,50)
.320
(8,13)
.200
(5,08)
.200
SPDT
.190
(4,83)
DIA.
.100
(2,54)
DIA.
.130
(3,30)
TYP.
.100
(2,54)
TYP.
SPECIFICATIONS
Electrical Ratings
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
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, for both
silver and gold-plated contacts
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)
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
CIRCUITRY
ORDERING INFORMATION
Series:
38BT = SPST, Momentary, Thru-Hole
Series:
38BC = SPDT, Momentary, Thru-Hole
Dimension A:
0 = 0.020" 4 = 0.215"
38BT-4-V-3-S
SPST–N.O.
SPST N.O.
COMM
TERM. 2
N.C.
TERM. 1
N.O.
TERM. 3
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:
V = Vertical 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
SPDT–N.O.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
1
.020 (0,51)
SQ. TYP.
Pushbutton
7
嵌入式系统
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