Pushbutton
E020 Series
Sealed Snap-acting Momentary Pushbutton Switches
Features/Benefits Typical Applications
A
Process sealed with disposable Instrumentation
splashproof boot
Telecommunications and
Long life contact design networking equipment
Snap-fitting plunger available Computers and peripherals
RoHS compliant models available
Models Available
Specifications Materials
CONTACT RATING: B contact material (EX25 Models): 0.4 VA max. CASE & BUSHING: Glass filled nylon 6/6, flame retardant
@ 20 V AC or DC max. G contact material (EX21 Models): 1 AMP
(UL 94V-0).
@120 V AC or 28 V DC or 0.4 VA max. @ 20 V AC or DC max.
PLUNGER: Glass filled nylon or glass filled polyester (PBT)
Note: Break-before-make contacts. Multi-pole contacts
(UL 94V-0).
do not make and break simultaneously. See page A-26 for
SWITCH SUPPORT: Brass or steel, matte-tin.
additional ratings.
SWITCH SUPPORT RETAINER: Stainless steel.
ELECTRICAL LIFE: 60,000 make-and-break cycles at full load.
N.O. & N.C. CONTACTS: EX25 MODELS: B contact material: Copper
CONTACT RESISTANCE: Below 50 m typ. initial @
alloy, with gold plate over nickel plate. EX21 MODELS: G contact
24 V DC, 100 mA, for both silver and gold plated contacts.
material: Coin silver, with gold plate over nickel plate. See page
9
INSULATION RESISTANCE: 10 min.
A-26 for additional contact materials.
DIELECTRIC STRENGTH: 1000 Vrms min. @ sea level.
COMMON CONTACTS & ALL TERMINALS: Copper alloy, with
OPERATING TEMPERATURE: 30C to 75C.
gold plate over nickel plate. See page A-26 for additional
contact materials.
CAP INSTALLATION FORCE: 10 lbs. max. permissible.
TERMINAL SEAL: Epoxy.
SOLDERABILITY: Per MIL-STD-202F method 208D, or
DISPOSABLE BOOT: Vinyl splashproof boot supplied standard.
EIA RS-186E method 9 (1 hour steam aging).
Remove and discard only after soldering and cleaning
NOTE: Any models supplied with P, R, B or G contact material are RoHS compliant.
processes are complete.
NOTE: Specifications and materials listed above are for switches with standard options.
For information on specific and custom switches, consult Customer Service Center.
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-22 thru A-28. For additional options not shown in catalog, consult our Customer Service Center.
All models are process sealed to withstand machine soldering temperatures and pressure wash cleaning methods.
Switch Function
E121 SPDT On-Mom. 1 Amp
E221 DPDT On-Mom. 1 Amp
E125 SPDT On-Mom. 0.4VA
E225 DPDT On-Mom. 0.4VA
Plunger
S .282" high
M .331" high, snap-fitting
Bushing
S1 .332" high
D1 Unthreaded
D3 .180" high, unthreaded
Terminations
A Right angle, PC thru-hole
Contact Material
AV2 Vertical right angle, PC thru-hole
B Gold
C PC Thru-hole
G Gold over silver
A3 Right angle, snap-in, PC thru-hole
P Gold, matte-tin
AV3 Vertical right angle, snap-in, PC thru-hole
R Gold over silver, matte-tin
V3 .460" high, V-bracket
V4 .630" high, V-bracket
V6 .460" high, V-bracket
V8 .953" high, V-bracket
Seal
V31 .460" high, snap-in V-bracket
E Epoxy and disposable
V41 .630" high, snap-in V-bracket
splashproof boot
V61 .460" high, snap-in V-bracket
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
www.ck-components.com
A-21
E020 Series
Sealed Snap-acting Momentary Pushbutton Switches
SWITCH FUNCTION
A
SWITCH FUNCTION CONNECTED TERMINALS
POS. 1 POS. 2 POS. 1 POS. 2
NO. MODEL
C&K marking this side C&K marking this side
POLES NO. SCHEMATIC
E121 ON MOM.
SP 1-3 1-2
E125 ON MOM.
SPDT
SPDT
Terminal Nos.
For Reference Only
Part number shown: E121SD1CGE
E221 ON MOM.
DP 1-3,4-6 1-2,4-5
E225 ON MOM.
DPDT
DPDT
Terminal Nos.
Part number shown: E221SD1CBE
For Reference Only
MOM. = Momentary EX25 models must be ordered with B or P contact material.
EX21 models must be ordered with G or R contact material.
E121, E221 models with all options
when ordered with G or R contact material.
PLUNGER
S .282" HIGH S1 .332" HIGH M .332" HIGH SNAP-FITTING
Not Available with D1 bushing.
NOTE: Caps available for all plunger options, see page A-27.
BUSHING
D1 UNTHREADED D3 .180" HIGH UNTHREADED
Not available with S1 actuator.
Third Angle
NOTE: Disposable splashproof vinyl over actuator and bushing supplied std., see page A-26.
Projection
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
www.ck-components.com
A-22
Pushbutton