8020 Series
Snap-acting Momentary Pushbutton Switches
Features/Benefits
•
Positive tactile feel
•
Multi-positions available
•
Wide variety of termination options
•
Epoxy terminal seal compatible with
bottom wash cleaning
Typical Applications
•
Instrumentation
•
Computer peripherals
•
Telecommunications equipment
A
Pushbutton
•
RoHS compliant models available
Models Available
Specifications
CONTACT RATING: B contact material (8X25 Models): 0.4 VA max.
@ 20 V AC or DC maximum. G contact material (8X21, U8X1
Models): 1 AMP @ 120 V AC or 28 V DC or 0.4 VA max. @ 20 V
AC or DC max. Note: Break-before-makecontacts. Multi-pole
contacts do not make and break simultaneously. See page A-43
for additional ratings.
ELECTRICAL LIFE: 60,000 make-and-break cycles at full load.
CONTACT RESISTANCE: Below 50 mΩ typ. initial @
2-4 V DC, 100 mA, for both silver and gold plated contacts.
INSULATION RESISTANCE: 109
Ω
min.
DIELECTRIC STRENGTH: 1,000 Vrms min. @ sea level.
OPERATING TEMPERATURE: 8X2X MODELS: –30ºC to 75ºC.
U8X1 MODELS: –30ºC to 65ºC.
CAP INSTALLATION FORCE: 10 lbs. max. permissible.
SOLDERABILITY: Per MIL-STD-202F method 208D, or EIA RS-186E
method 9 (1 hour steam aging).
NOTE:
Any models supplied with B, P, R, or G contact material are RoHS compliant.
NOTE:
Specifications and materials listed above are for switches with standard options.
For information on specific and custom switches, consult Customer Service Center.
Materials
CASE: Glass filled nylon 6/6 or diallyl phthalate (DAP),
flame retardant (UL 94V-0).
PLUNGER: Glass filled nylon or glass filled polyester (PBT) (UL 94V-0).
CAP & FRAME: Nylon, black, standard.
BUSHING: Brass or zinc, nickel plated.
HOUSING: Stainless steel.
SWITCH SUPPORT: Brass or steel, matte-tin plated.
N.O. & N.C. CONTACTS: 8X21, U8X1 MODELS: G contact material:
Coin silver, with gold plate over nickel plate. See page A-43 for
additional contact materials.
8X25 MODELS: B contact material: Copper alloy, with gold plate
over nickel plate. See page A-43 for additional contact materials.
COMMON CONTACT & ALL TERMINALS: Copper alloy, with gold
plate over nickel plate.
TERMINAL SEAL: Epoxy. Refer to soldering and cleaning
Technical Data Chapter.
HARDWARE: Nut & Locking Ring: Brass, nickel plated;
Lockwasher: Steel, nickel plated.
Build-A-Switch
To order, simply select desired option from each category and place in the appropriate box. Available options are shown
and described on pages A-30 thru A-45. For additional options not shown in catalog, consult Customer Service Center. All
models have epoxy terminal seal and are compatible with all “bottom-wash” PCB cleaning methods.
Switch Function
8121
SPDT On-Mom. 1 Amp
8125
SPDT On-Mom. 0.4VA
8221
DPDT On-Mom. 1 Amp
8225
DPDT On-Mom. 0.4VA
8321
3PDT On-Mom. 1 Amp
8325
3PDT On-Mom. 0.4VA
8421
4PDT On-Mom. 1 Amp
8425
4PDT On-Mom. 0.4VA
Note:
UL models
available, see page A-30
and A-31.
Actuator or Plunger
S
Plunger
NONE
Snap-in
J80
Snap-in
J81
Snap-in w/frame
J82
Snap-in w/frame for LED
J83
Snap-in w/frame &
flush cap
J84
Snap-in w/frame for LED,
flush cap
J85
Snap-in w/frame & LED
J95
PC w/V-bracket & LED
L
Plunger
M
Snap-fitting plunger
Bushing
D9
.280" high, keyway
H
.250" high, flat
NONE
No bushing
choice required
D
.280" high, keyway
D2
.288" high, flat
D3
.180" high
D8
.288" high, flat
H9
.250" high, flat, hi torque
Y
.350" high, keyway
Y3
6.35mm high,
keyway, hi torque
Y4
.378" high, flat, hi torque
Y9
.350" high, keyway
Contact Material
B
Gold
P
Gold, matte-tin
G
Gold over silver
R
Gold over silver,
matte-tin
Terminations
A
Right angle, PC thru-hole
AV2
Vertical right angle, PC thru-hole
C
PC Thru-hole
Z
Solder lug
A2
Right angle, PC thru-hole
A3
Right angle, snap-in, PC thru-hole
Seal
E
Epoxy
I
Epoxy potted
base
Cap Color
2
Black
NONE
Models
without caps
1
White
3
Red
V2
V3
V4
V6
V7
V8
V9
.555" high, V-bracket
.460" high, V-bracket
.630" high, V-bracket
.460" high, V-bracket
.630" high, V-bracket
.953" high, V-bracket
1.150" high, V-bracket
Frame Color
2
Black
NONE
Models
without frame
1
White
3
Red
5
Yellow
6
Green
9
Gray
LED Color
3
Red
NONE
Models
without LED
5
Yellow
6
Green
4
5
6
7
9
Orange
Yellow
Green
Blue
Gray
A4
Right angle, PC thru-hole, reversed terminals
A6
Right angle, PC thru-hole
AV1
Vertical right angle, PC thru-hole
AV3
Vertical right angle, snap-in, PC thru-hole
R
Right angle with PCB
R2
Right angle with PCB, reversed terminals
V31
.460" high, snap-in V-bracket
V61
.460" high, snap-in V-bracket
W
.750" long, wire wrap
W1
.964" long, wire wrap
W3
.425" long, wire wrap
W4
1.062" long, wire wrap
Z3
Quick connect
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
A-29
www.ckswitches.com
8020 Series
Snap-acting Momentary Pushbutton Switches
SWITCH FUNCTION
SWITCH FUNCTION
POS. 1
POS. 2
UL/CSA*
NO.
POLES
MODEL NO.
MODEL
NO.
C&K marking on
opposite side
C&K marking on
opposite side
A
Pushbutton
CONNECTED TERMINALS
POS. 1
POS. 2
SCHEMATIC
8421
4P
U841
ON
ON
MOM.
1-3,4-6,7-9,10-12
1-2,4-5,7-8,10-11
4PDT
MOM.
8425
4PDT
Part number shown: 8421SHZGE
MOM. = Momentary
* U811 thru U841 model numbers
with all options (except R, R2 terminations)
when ordered with G or R contact material.
Terminal Nos.
For Reference Only
8X25 models must be ordered with B or P contact material.
8X21 and U8X1 models must be ordered with G or R contact material.
CAP COLOR
ACTUATOR—SNAP-IN FRONT MOUNT
ACTUATOR OR PLUNGER
FRAME COLOR
J80
SNAP-IN
PANEL MOUNTING
OPTION
CODE
**
CAP AND FRAME COLOR
BLACK
No Frame Color (J80 option)
WHITE
RED
ORANGE
YELLOW
GREEN
BLUE
GRAY
PANEL MOUNTING
2
NONE
1
3
4
5
6
7
9
NOTE:
No frame color choice required.
** Increase this dim. to .620/.625 (15,75/15,88) for .091/.125 (2,31/3,18) thk. panels.
J81
SNAP-IN WITH FRAME
Other colors available, consult Customer
Service Center. Cap and Frame Finish: matte.
NOTE:
Caps and frames available separately,
see pages A-44 and A-45.
**
NOTE:
Available with C, W-W4, Z or Z3 terminations and SPDT and DPDT models only.
** Increase this dim. to .620/.625 (15,75/15,88) for .091/.125 (2,31/3,18) thk. panels.
Third Angle
Projection
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
A-31
www.ckswitches.com
8020 Series
Snap-acting Momentary Pushbutton Switches
CAP COLOR
A
ACTUATOR—SNAP-IN FRONT MOUNT
ACTUATOR OR PLUNGER
FRAME COLOR
Pushbutton
J83
SNAP-IN WITH FRAME AND FLUSH CAP
PANEL MOUNTING
**
J82
SNAP-IN WITH FRAME FOR LED
LED not included.
For LED information, see page A-45.
J84
SNAP-IN WITH FRAME FOR LED, FLUSH CAP
LED not included.
For LED information, see page A-45.
OPTION
CODE
CAP AND FRAME
COLOR
BLACK
WHITE
RED
ORANGE
YELLOW
GREEN
BLUE
GRAY
Other colors available, consult
Customer Service Center.
Cap and Frame Finish: matte.
Available with C, W-W4, Z or Z3 terminations and
SPDT and DPDT models only.
NOTE:
Caps and frames available separately,
see pages A-44 and A-45.
2
1
3
4
5
6
7
9
Third Angle
Projection
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
A-32
www.ckswitches.com
8020 Series
Snap-acting Momentary Pushbutton Switches
CAP COLOR
LED COLOR
ACTUATOR—SNAP-IN FRONT MOUNT
ACTUATOR OR PLUNGER
FRAME COLOR
A
J85
SNAP-IN WITH FRAME AND LED
Pushbutton
PANEL MOUNTING
*
* Increase this dim. to .620/.625 (15,75/15,88) for
.091/.125 (2,31/3,18) thk. panels.
8121J85ZGE223
SPST
Available with C, W-W4, Z or Z3
terminations and SPDT models only.
For LED information see page A-45.
NOTE:
Caps & frames available
separately, see pages A-44 and A-45.
OPTION
CODE
CAP AND FRAME
COLOR
BLACK
WHITE
RED
ORANGE
YELLOW
GREEN
BLUE
GRAY
OPTION
CODE
LED COLOR
RED
YELLOW
GREEN
2
1
3
4
5
6
7
9
3
5
6
For LED information see page A-45.
CAP COLOR
ACTUATOR—PC MOUNT
ACTUATOR OR PLUNGER
LED COLOR
J95
PC WITH V-BRACKET AND LED
PC MOUNTING
OPTION
CODE
CAP AND FRAME
COLOR
BLACK
WHITE
RED
ORANGE
YELLOW
GREEN
BLUE
GRAY
OPTION
CODE
LED COLOR
RED
YELLOW
GREEN
2
1
3
4
5
6
7
9
NOTE:
Caps available separately, see page A-44.
Available with V3 terminations and SPDT models only.
3
5
6
8121J95V3GE23
SPST
For LED information see page A-45.
Third Angle
Projection
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
A-33
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