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: 109Ω 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
29 Aug 18
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
CONNECTED TERMINALS
POS. 1
POS. 2
Pushbutton
SCHEMATIC
4P
8421
8425
U841
ON
ON
MOM.
1-3,4-6,7-9,10-12
MOM.
1-2,4-5,7-8,10-11
4PDT
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
J80
SNAP-IN
ACTUATOR OR PLUNGER
FRAME COLOR
PANEL MOUNTING
OPTION
CODE
**
CAP AND FRAME COLOR
BLACK
No Frame Color (J80 option)
WHITE
RED
ORANGE
YELLOW
GREEN
BLUE
GRAY
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
PANEL MOUNTING
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
29 Aug 18
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
J83
SNAP-IN WITH FRAME AND FLUSH CAP
ACTUATOR OR PLUNGER
FRAME COLOR
Pushbutton
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
2
1
3
4
5
6
7
9
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.
Third Angle
Projection
29 Aug 18
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
J85
SNAP-IN WITH FRAME AND LED
ACTUATOR OR PLUNGER
FRAME COLOR
A
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
J95
PC WITH V-BRACKET AND LED
ACTUATOR OR PLUNGER
LED COLOR
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
29 Aug 18
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
A-33
www.ckswitches.com
Programming Basics
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