Grayhill Pushbutton switches: Butt Contact 38BC Series User Manual
Dimensions, Rating criteria, Materials and finishes
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Pushbutton Switches
.320
(8,13)
.410 (10,41)
MAX.
.162
(4,11)
DIM "A"
.200
(5,08)
.024
(0,61)
.075
(1,91)
.030
(0,76)
.289
(7,34)
.105 (2,67)
TYP.
.200.010
(5,080,25)
.020 (0,51)
TYP.
.180 (4,57)
DIA.
.100 (2,54)
DIA.
C
L
.125
(3,18)
.125
(3,18)
.024
(0,61)
.162
(4,11)
.289
(7,34)
DIM "A"
"A"
.100
(2,54)
.200.010
(5,080,25)
.200
(5.08)
.320
(8.13)
90˚
.105
(2,67)
TYP.
.075
(1,91)
.410 (10,41)
MAX.
1 2
3
.030
(0,76)
TERMINAL ID
38BC
Butt Contact Pushbutton Switches
SerieS 38BM and 38BC
Sub-Miniature Surface Mount
FeatureS
• Surface Mount Process Compatible
• Sealed Construction
• SPST and SPDT, Momentary Contact
• Extended or Flush Plunger
• Drop-In Replacement for Industry Standard
SPeCiFiCatiOnS
PC Mounting
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: I.O. Amps 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)
.070
(1,78)
.040
(1,02)
TYP.
.143
(3,63)
TYP.
.128
(3,25)
TYP.
.080 (2,03)
TYP.
.040
(1,02)
TYP.
.080
(2,03)
.368
(9,35)
.150 (3,81)
TYP.
TERMINAL PADS
.040
(1.02)
STANDOFF PADS
.070
(1.78)
.368
(9.35)
.080 (2,03)
.128 (3,25)
.040
(1.02)
.150
(3.81)
.080
(2,03)
.143
(6.63)
diMenSiOnS
in inches (and millimeters)
Materials and Finishes
Base and Cover: Thermoplastic (UL 94V-0)
Plunger: Thermoplastic (UL 94V-0), with
standard internal o-ring seal
terminals: Copper alloy, gold plate 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
SPSt
SPdt
38BM