E020 Series
Sealed Snap-acting Momentary Pushbutton Switches
Features/Benefits
•
Process sealed with disposable
splashproof boot
•
Long life contact design
•
Snap-fitting plunger available
•
RoHS compliant models available
Typical Applications
•
Instrumentation
•
Telecommunications and
networking equipment
A
Pushbutton
•
Computers and peripherals
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.
CONTACT RESISTANCE: Below 50 m21Ω typ. initial @
2–4 V DC, 100 mA, for both silver and gold plated contacts.
INSULATION RESISTANCE: 109Ω min.
DIELECTRIC STRENGTH: 1000 Vrms min. @ sea level.
OPERATING TEMPERATURE: –3021ºC to 75º21C.
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 P, R, B 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.
N.O. & N.C. CONTACTS: EX25 MODELS: B contact material: Copper
alloy, with gold plate over nickel plate. EX21 MODELS: G contact
material: Coin silver, with gold plate over nickel plate. See page
A-26 for additional contact materials.
COMMON CONTACTS & ALL TERMINALS: Copper alloy, with
gold plate over nickel plate. See page A-26 for additional
contact materials.
TERMINAL SEAL: Epoxy.
DISPOSABLE BOOT: Vinyl splashproof boot supplied standard.
Remove and discard only after soldering and cleaning
processes are complete.
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
S1
.332” high
Bushing
D1
Unthreaded
D3
.180” high, unthreaded
Terminations
A
Right angle, PC thru-hole
AV2
Vertical right angle, PC thru-hole
C
PC Thru-hole
A3
Right angle, snap-in, PC thru-hole
AV3
Vertical right angle, snap-in, PC thru-hole
V3
.460” high, V-bracket
V4
.630” high, V-bracket
V6
.460” high, V-bracket
V8
.953” high, V-bracket
V31
.460” high, snap-in V-bracket
V41
.630” high, snap-in V-bracket
V61
.460” high, snap-in V-bracket
Contact Material
B
Gold
G
Gold over silver
P
Gold, matte-tin
R
Gold over silver, matte-tin
Seal
E
Epoxy and disposable
splashproof boot
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
A-21
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E020 Series
Sealed Snap-acting Momentary Pushbutton Switches
A
SWITCH FUNCTION
SWITCH FUNCTION
POS. 1
POS. 2
NO.
POLES
MODEL
NO.
CONNECTED TERMINALS
POS. 1
POS. 2
Pushbutton
C&K marking this side
C&K marking this side
SCHEMATIC
SP
E121
E125
ON
ON
MOM.
1-3
MOM.
1-2
SPDT
SPDT
Part number shown: E121SD1CGE
Terminal Nos.
For Reference Only
ON
ON
MOM.
1-3,4-6
MOM.
1-2,4-5
DPDT
DP
E221
E225
DPDT
Part number shown: E221SD1CBE
MOM. = Momentary
with all options
E121, E221 models
when ordered with G or R contact material.
Terminal Nos.
For Reference Only
EX25 models must be ordered with B or P contact material.
EX21 models must be 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.
NOTE: Disposable splashproof vinyl over actuator and bushing supplied std., see page A-26.
Third Angle
Projection
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
A-22
www.ckswitches.com
E020 Series
Sealed Snap-acting Momentary Pushbutton Switches
TERMINATIONS
C
PC THRU-HOLE
PC MOUNTING
A
Pushbutton
SPDT and DPDT
A
RIGHT ANGLE, PC THRU-HOLE
SECTION A-A
E121SD1AGE
SPDT
A3
RIGHT ANGLE, SNAP-IN, PC THRU-HOLE
PC MOUNTING
NOTE: Terminal bend radii and lead-in manufacturing option.
A
RIGHT ANGLE, PC THRU-HOLE
E221SD1AGE
DPDT
SECTION A-A
A3
RIGHT ANGLE, SNAP-IN, PC THRU-HOLE
PC MOUNTING
NOTE: Terminal bend radii and lead-in manufacturing option.
Third Angle
Projection
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
A-23
www.ckswitches.com
E020 Series
Sealed Snap-acting Momentary Pushbutton Switches
A
TERMINATIONS
AV2
VERTICAL RIGHT ANGLE, PC THRU-HOLE,
.150” PITCH
Pushbutton
E121SD1AV2GE
SPDT
SECTION A-A
AV3
VERTICAL RIGHT ANGLE, SNAP-IN, PC THRU-HOLE,
.150” PITCH
PC MOUNTING
NOTE: Terminal bend radii and lead-in manufacturing option.
AV2
VERTICAL RIGHT ANGLE, PC THRU-HOLE,
.150” PITCH
E221SD1AV2GE
DPDT
SECTION A-A
AV3
VERTICAL RIGHT ANGLE, SNAP-IN, PC THRU-HOLE,
.150” PITCH
PC MOUNTING
NOTE: Terminal bend radii and lead-in manufacturing option.
Third Angle
Projection
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
A-24
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E020 Series
Sealed Snap-acting Momentary Pushbutton Switches
TERMINATIONS
V3, V4
VERTICAL MOUNT, V-BRACKET
V31, V41
VERTICAL MOUNT, V-BRACKET, SNAP-IN
PC MOUNTING
A
Pushbutton
Dim 'A'
E121SD3__GE
SPDT
SNAP-IN
OPTION
CODE
DIM ‘A’
.460 (11,68)
.630 (16,00)
V3, V31
V4, V41
V3, V4
VERTICAL MOUNT, V-BRACKET
V31, V41
VERTICAL MOUNT, V-BRACKET, SNAP-IN
PC MOUNTING
Dim 'A'
E221SD3__GE
DPDT
SNAP-IN
OPTION
CODE
DIM ‘A’
.460 (11,68)
.630 (16,00)
V3, V31
V4, V41
V6, V8
VERTICAL MOUNT, V-BRACKET
V61, V81
VERTICAL MOUNT, V-BRACKET, SNAP-IN
.122 DIA.
.192
(4,88)
.060 MAX.
(1,53)
PC MOUNTING
C&K MARKING ON
OPPOSITE SIDE
.180
(4,57)
DIM ’A’
E121SD3__GE
SPDT
OPTION
CODE
DIM ‘A’
.460 (11,68)
.953 (24,21)
1
C
.020 TYP.
(0,51)
.185 TYP.
(4,70)
2
3
NO NC
.030 X .050 TYP.
(0,76) (1,27)
.050
(1,27)
.360
(9,14)
.185
(4,70)
.250
(6,35)
V6, V61
V8, V81
.750
(19,05)
Third Angle
Projection
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
A-25
www.ckswitches.com
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