Butt Contact Pushbutton Switches
SerieS 39
SPSt and SPdt, 1/4 amp
FeatureS
• Fully Protected During Flux
Cleaning Operations
diMenSiOnS
in inches (and millimeters)
SPdt–PC Mount
Large Button Style
39-261*
.187 ± .010 (4,75 ± 0,25) DIA.
.328 ± .015
(8,33 ± 0,38)
.500 ± .015
(12,7 ± 0,38)
rating at
28 Vdc
resistive
150 mA
action
Momentary
rating at
115 Vac
resistive
1
rating at
220 Vac
resistive
1
Operations
at rated
Load
500,000
.270 (6,86) REF.
/
4
Amp
/
8
Amp
Partial
Part
number
39-251*
39-261*
.068 ± .010 (1,73 ± 0,25)
.100 ± .010 (2,54 ± 0,25)
.125 ± .010 (3,18 ± 0,25)
total travel
actuating Force (oz.)
Pushbutton Switches
.090 + .010/ – .015
(2,29 + 0,25/ – 0,38)
10 ± 3 oz.
.030 ± .002 (0,76 ± 0,05) DIA.
.250 ± .010 (6,35 ± 0,25) DIA.
.084 ± .005 (2,13 ± 0,13) DIA.
.050 ± .005
(1,27 ± 0,13)
.250 ± .015 (6,35 ± 0,38)
.060 (1,52) REF.
.100 ± .015 (2,54 ± 0,38)
Small Button Style
39-251*
END OF BUTTON HAS A .200 (5,08) SPHERICAL RADIUS
.250 ± .010 (6,35 ± 0,25) DIA.
.200 ± .015 (5,08 ± 0,38)
.060 (1,52) REF.
.100 ± .015 (2,54 ± 0,38)
.400 ± .015
(10,16 ± 0,38)
E
.090
± .010
(2,29
C
L
± 0,25)
.300
± .010
(7,62
± 0,25)
.100 ± .010 (2,54 ± 0,25)
C
L
.100 ± .010 (2,54 ± 0,25)
.084 ± .005 (2,13 ± 0,13) DIA.
.050 ± .005 (1,27 ± 0,13)
.340 ± .015
(8,64 ± 0,38)
.050 ± .005
(1,27 ± 0,13) TYP.
.400 ± .015
(10,16 ± 0,38)
.100 – .005 (2,54 – 0,13)
.340 ± .015
(8,64 ± 0,38)
.050 ± .005
(1,27 ± 0,13) TYP.
GRAYHILL
.090
± .010
(2,29
C
± 0,25)
L
.300
± .010
(7,62
± 0,25)
.100 ± .010
(2,54 ± 0,25)
C
L
.100 ± .010
(2,54 ± 0,25)
N.C.
N.O.
XXXX
E.I.A. DATE
CODE
CirCuitry
2 Circuits Per Switch
SPSt n.C.
N.C.
Actuator
N.C.
SPeCiFiCatiOnS
rating Criteria
Contact resistance: 25 milliohms maximum
on a new switch
Voltage Breakdown: 1,000 Vac between
mutually insulated parts
insulation resistance: 1,000 megohms
minimum
Operating temperature: -40°C to +125°C
OrderinG inFOrMatiOn
*Complete
Part number
39-251 red
39-251 BLK
39-261 red
39-261 BLK
description
Small Red Button, SPDT
Small Black Button, SPDT
Large Red Button, SPDT
Large Black Button, SPDT
SPSt n.O.
N.O.
N.O.
Materials and Finishes
alternate Wiring
SPdt
BreaK BeFOre
C
MaKe
CONNECT PINS
ON PC BOARD
N.O.
Actuator
N.C.
Button: Nylon
Base and Cover: Polyester, red in color
Shorting Bar:
Phosphor bronze, gold-plated
over nickel
terminals: Brass, gold-plated over nickel
Spring: Tinned music wire
O-ring:
Fluorosilicone
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com