Pushbutton
8020 Series
Snap-acting Momentary Pushbutton Switches
Features/Benefits Typical Applications
A
Positive tactile feel Instrumentation
Multi-positions available Computer peripherals
Wide variety of termination options Telecommunications equipment
Epoxy terminal seal compatible with
bottom wash cleaning
RoHS compliant models available
Models Available
Specifications Materials
CONTACT RATING: B contact material (8X25 Models): 0.4 VA max.
CASE: Glass filled nylon 6/6 or diallyl phthalate (DAP),
@ 20 V AC or DC maximum. G contact material (8X21, U8X1
flame retardant (UL 94V-0).
Models): 1 AMP @ 120 V AC or 28 V DC or 0.4 VA max. @ 20 V
PLUNGER: Glass filled nylon or glass filled polyester (PBT) (UL 94V-0).
AC or DC max. Note: Break-before-makecontacts. Multi-pole
contacts do not make and break simultaneously. See page A-43
CAP & FRAME: Nylon, black, standard.
for additional ratings.
BUSHING: Brass or zinc, nickel plated.
ELECTRICAL LIFE: 60,000 make-and-break cycles at full load.
HOUSING: Stainless steel.
CONTACT RESISTANCE: Below 50 m typ. initial @
2-4 V DC, 100 mA, for both silver and gold plated contacts. SWITCH SUPPORT: Brass or steel, matte-tin plated.
9
INSULATION RESISTANCE: 10 min. N.O. & N.C. CONTACTS: 8X21, U8X1 MODELS: G contact material:
Coin silver, with gold plate over nickel plate. See page A-43 for
DIELECTRIC STRENGTH: 1,000 Vrms min. @ sea level.
additional contact materials.
OPERATING TEMPERATURE: 8X2X MODELS: 30C to 75C.
8X25 MODELS: B contact material: Copper alloy, with gold plate
U8X1 MODELS: 30C to 65C.
over nickel plate. See page A-43 for additional contact materials.
CAP INSTALLATION FORCE: 10 lbs. max. permissible.
COMMON CONTACT & ALL TERMINALS: Copper alloy, with gold
SOLDERABILITY: Per MIL-STD-202F method 208D, or EIA RS-186E
plate over nickel plate.
method 9 (1 hour steam aging).
TERMINAL SEAL: Epoxy. Refer to soldering and cleaning
NOTE: Any models supplied with B, P, R, or G contact material are RoHS compliant.
Technical Data Chapter.
NOTE: Specifications and materials listed above are for switches with standard options.
HARDWARE: Nut & Locking Ring: Brass, nickel plated;
For information on specific and custom switches, consult Customer Service Center.
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 Bushing Contact Material
8121 SPDT On-Mom. 1 Amp D9 .280" high, keyway B Gold Frame Color
8125 SPDT On-Mom. 0.4VA H .250" high, flat 2 Black
P Gold, matte-tin
Actuator or Plunger
8221 DPDT On-Mom. 1 Amp NONE No bushing G Gold over silver NONE Models
S Plunger
8225 DPDT On-Mom. 0.4VA choice required without frame
R Gold over silver,
NONE Snap-in
8321 3PDT On-Mom. 1 Amp D .280" high, keyway matte-tin 1 White
J80 Snap-in
8325 3PDT On-Mom. 0.4VA D2 .288" high, flat 3 Red
J81 Snap-in w/frame
8421 4PDT On-Mom. 1 Amp D3 .180" high 5 Yellow
J82 Snap-in w/frame for LED
8425 4PDT On-Mom. 0.4VA D8 .288" high, flat 6 Green
Seal
J83 Snap-in w/frame &
H9 .250" high, flat, hi torque 9 Gray
E Epoxy
Note: UL models flush cap
Y .350" high, keyway
I Epoxy potted
available, see page A-30
J84 Snap-in w/frame for LED, LED Color
Y3 6.35mm high,
and A-31. base
flush cap
Cap Color 3 Red
keyway, hi torque
J85 Snap-in w/frame & LED NONE Models
2 Black 4 Orange
Y4 .378" high, flat, hi torque
J95 PC w/V-bracket & LED
NONE Models 5 Yellow without LED
Y9 .350" high, keyway
L Plunger
without caps 6 Green 5 Yellow
M Snap-fitting plunger 6 Green
1 White 7 Blue
3 Red 9 Gray
Terminations
A4 Right angle, PC thru-hole, reversed terminals V2 .555" high, V-bracket V31 .460" high, snap-in V-bracket
A Right angle, PC thru-hole
A6 Right angle, PC thru-hole V3 .460" high, V-bracket V61 .460" high, snap-in V-bracket
AV2 Vertical right angle, PC thru-hole
AV1 Vertical right angle, PC thru-hole V4 .630" high, V-bracket W .750" long, wire wrap
C PC Thru-hole
AV3 Vertical right angle, snap-in, PC thru-hole V6 .460" high, V-bracket W1 .964" long, wire wrap
Z Solder lug
R Right angle with PCB V7 .630" high, V-bracket W3 .425" long, wire wrap
A2 Right angle, PC thru-hole
R2 Right angle with PCB, reversed terminals V8 .953" high, V-bracket W4 1.062" long, wire wrap
A3 Right angle, snap-in, PC thru-hole
V9 1.150" high, V-bracket Z3 Quick connect
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
www.ck-components.com
A-298020 Series
Snap-acting Momentary Pushbutton Switches
SWITCH FUNCTION
A
SWITCH FUNCTION CONNECTED TERMINALS
POS. 1 POS. 2 POS. 1 POS. 2
UL/CSA*
NO. MODEL
C&K marking on C&K marking on
POLES MODEL NO. NO. opposite side opposite side SCHEMATIC
8121 U811 ON MOM.
SP 1-3 1-2
8125 ON MOM.
SPDT
SPDT
Terminal Nos.
Part number shown: 8121SHZGE
For Reference Only
8221 U821 ON MOM.
DP 1-3,4-6 1-2,4-5
8225 ON MOM.
DPDT
DPDT
Part number shown: 8221SHZGE Terminal Nos.
For Reference Only
8321 U831 ON MOM.
3P 1-3,4-6,7-9 1-2,4-5,7-8
8325 ON MOM.
3PDT
3PDT
Terminal Nos.
Part number shown: 8321SHZGE For Reference Only
MOM. = Momentary 8X25 models must be ordered with B or P contact material.
8X21 and U8X1 models must be ordered with G or R contact material.
*U811 thru U841 model numbers with all options (except R, R2 terminations)
when ordered with G or R contact material.
Third Angle
Projection
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
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A-30
Pushbutton