EP Series
Sealed Tiny Pushbutton Switches
Features/Benefits
• Sealed against solder &
Typical Applications
• Telecommunications and
• Thru-hole and surface mount models
• Snap-fitting actuator accepts
• Computers and peripherals
• Instrumentation and controls
standard caps
A
networking equipment
Pushbutton
cleaning processes
• Tape & reel packaging available
• RoHS compliant models available
Models Available
Specifications
Materials
CONTACT RATING: B contact material: 0.4 VA max. @
20 V AC or DC max. See page A-13 for additional ratings.
CASE & BUSHING: High temperature material, glass filled nylon 4/6,
flame retardant, heat stabilized (UL 94V-0) on EP11 / EP12
models; glass filled nylon 6/6 on EP21.
ELECTRICAL LIFE: EP11, EP21 models: 60,000 make-and-break
cycles at full load. EP12 models: 30,000 cycles.
CONTACT RESISTANCE: Below 20 mΩ9 typ. initial @
2-4 V DC, 100 mA, for both silver and gold plated contacts.
INSULATION RESISTANCE: 109 Ω9 min.
PLUNGER: Thermoplastic polyester or glass filled nylon (UL 94V-0),
with internal o-ring seal. SA surface mount: High temperature
material, glass filled LCP (UL 94V-0).
SWITCH SUPPORT: Brass, matte-tin plated.
CONTACTS & TERMINALS: B contact material: Copper alloy,
with gold plate over nickel plate. See page A-13 for additional
contact materials.
DIELECTRIC STRENGTH: 1000 Vrms min. @ sea level.
OPERATING TEMPERATURE: –30ºC to 85ºC.
SOLDERABILITY: Per MIL-STD-202F method 208D, or
EIA RS-186E method 9 (1 hour steam aging).
TERMINAL SEAL: Epoxy.
DEGREE OF PROTECTION: IP57; Protection against harmful dust
deposit, full-scale voltage protection, temporary immersion.
PACKAGING: Surface mount switches standard in anti-static
tape and reel packaging per EIA 481-3, see page A-14 for
drawings and reel information. Tape and cover strip are
conductive for use near statically sensitive components,
consult Customer Service Center.
NOTE: Any models supplied with Q, B, P, S, 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.
CAUTION: PC mounting layouts and pads as shown are designed to be compatible with the
latest equipment and reflow techniques. Care should be taken in the design and location of
PC lands to suit individual needs. Orientation relative to reflow direction may significantly
impact solder joint integrity.
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-10 thru A-14. For additional options not shown in catalog, consult Customer Service Center. All
models are process sealed to withstand machine soldering temperatures and pressure wash cleaning methods.
Switch Function
EP11 SPST Off-Mom.
EP12 SPDT On-Mom.
EP21 DPST Off-Mom.
Plunger
S .215” high
S1 .110” high
S2 .465” high
FP Flush
R Snap-fitting, .215 high
(not available with EP12 version)
Seal
E Epoxy
Bushing
D1 Unthreaded
Terminations
A Right angle, PC thru-hole
C PC Thru-hole
AV Vertical right angle, PC thru-hole
AV3 Vertical right angle, snap-in, PC thru-hole
SA Right angle, surface mount
SA1 Right angle, surface mount rear facing
V3 Vertical mount, v-bracket
V31 Vertical mount, v-bracket, snap-in
(EP11 & EP12 only)
W Wire wrap
Contact Material
B Gold
P Gold, matte-tin
Q Silver
S Silver, matte-tin
G Gold over silver
R Gold over silver, matte tin
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
5 Aug 20
A-9
www.ckswitches.com
EP Series
Sealed Tiny Pushbutton Switches
SWITCH FUNCTION
Pushbutton
A
NO.
POLES
SP
MODEL
NO.
SWITCH FUNCTION
POS. 1
POS. 2
CONNECTED TERMINALS
POS. 1
POS. 2
C&K marking on opposite side
C&K marking on opposite side
EP11
OFF
MOM.
OPEN
1-3
EP12
ON
MOM.
2-1
2-3
SCHEMATIC
SPST
SPDT
SPDT
Omit terminal 2 for
EP11 models.
Terminal Nos.
For Reference Only
Part number shown: EP12SD1CBE
DP
EP21
OFF
MOM.
OPEN
1-3,4-6
DPST
DPST
Terminal Nos.
For Reference Only
Part number shown: EP21SD1CBE
MOM. = Momentary
All models
with all options when ordered with G, Q, R or S contact material.
PLUNGER
S
S1
.215” HIGH
S2
.110” HIGH
.465” HIGH
FP
FLUSH PLUNGER
R
SNAP-FITTING
FP & R actuators are not available with EP21 model.
R actuators are not available with EP12 model.
S1& S2 actuators are not available with EP12 & EP21 models.
NOTE: Caps available for plunger options, see page A-14.
BUSHING
D1
UNTHREADED
NOTE: Internal actuator o-ring standard.
Third Angle
Projection
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
5 Aug 20
A-10
www.ckswitches.com
EP Series
Sealed Tiny Pushbutton Switches
TERMINATIONS
A
W WIRE WRAP
SP
Pushbutton
C PC THRU-HOLE
DP
SP
DP
PC MOUNTING
EP11 - Omit
center hole.
SP and DP
SP and DP
A RIGHT ANGLE, PC THRU-HOLE
PC MOUNTING
EP12SD1ABE
SPDT
EP11 Models:
omit terminal 2.
EP11 Models:
omit thru-hole 2.
A RIGHT ANGLE, PC THRU-HOLE
PC MOUNTING
EP21SD1ABE
DPST
AV VERTICAL RIGHT ANGLE, PC THRU-HOLE
PC MOUNTING
EP12SD1AVBE
SPDT
EP11 Models:
omit terminal 2.
EP11 Models:
omit hole 2.
NOTE: Terminal bend radii and lead-in manufacturing option.
Third Angle
Projection
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
5 Aug 20
A-11
www.ckswitches.com
EP Series
Sealed Tiny Pushbutton Switches
Pushbutton
A
TERMINATIONS
AV VERTICAL RIGHT ANGLE, THRU-HOLE
PC MOUNTING
EP21SD1AVBE
DPST
NOTE: Terminal bend radii and lead-in manufacturing option.
AV3 VERTICAL RIGHT ANGLE, SNAP-IN, PC THRU-HOLE
PC MOUNTING
EP12SD1AV3BE
SPST
EP11 Models:
omit hole 2.
SA RIGHT ANGLE, SURFACE MOUNT
PC MOUNTING
.320
(8,13)
EP12SD1SAPE
SPDT
.410 MAX
(10,41)
Available with P contact material only.
Not Available on DPST models.
EP11 Models:
omit pad 2.
EP11 Models:
omit terminal 2.
SA1 RIGHT ANGLE, SURFACE MOUNT
PC MOUNTING
.100
(2,54)
.276
(7,0)
.041
(1,04)
.181
(4,60)
.320
(8,13)
.313
(7,95)
.059
(1,50)
EP12SD1SA1BE
SPDT
SA1 is only available with B and P contact materials.
Not Available on DPST models.
EPOXY SEAL
.020 TYP
(0,51)
.272
(6,90)
.220
(5,60)
.071 TYP.
(1,80)
.059
(1,50)
YY/WW
0.4VA MAX
.160
(4,06)
.400
(10,16)
1
.200
(5,08)
.051
(1,30)
.121
(3,07)
.217
(5,51)
.234
(5,94)
2
TERMINAL NOS. .032 TYP.
3 FOR REF. ONLY
(0,80)
.200
(5,08)
.100
(2,54)
.082 TYP.
(2,10)
Third Angle
Projection
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
5 Aug 20
A-12
www.ckswitches.com
EP Series
Sealed Tiny Pushbutton Switches
TERMINATIONS
A
Pushbutton
V3 VERTICAL MOUNT, V-BRACKET
V31 VERTICAL MOUNT, V-BRACKET, SNAP-IN
PC MOUNTING
EP11 Models:
o
e e
V31 SNAP-IN
ole
EP12SD1V3BE
SPDT
EP11 Models:
omit terminal 2.
V3 VERTICAL MOUNT, V-BRACKET
PC MOUNTING
EP21SD1V3BE
DPST
CONTACT MATERIAL
OPTION
CODE
CONTACT
MATERIAL
B
GOLD 1
P
Q
SILVER 4,5
S
G
R
GOLD OVER SILVER 2,3
TERMINAL
PLATING
GOLD 1
RATINGS
LOW LEVEL/DRY CIRCUIT
0.4 VA MAX. @ 20 V AC OR DC MAX.
POWER
1 AMP @ 120 V AC OR 28 V DC.
GOLD 3
LOW LEVEL/DRY
0.4 VA MAX @ 20 V AC OR DC MAX. OR
MATTE-TIN 6
CIRCUIT OR POWER
1 AMP @ 120 V AC OR 28 V DC.
MATTE-TIN 6
SILVER 5
MATTE-TIN 6
* Note: See Technical Data section of this catalog for RoHS compliant and compatible definitions and specifications.
1 CONTACTS & TERMINALS: Copper alloy, with gold plate over nickel plate.
6 TERMINALS: Copper alloy, with matte tin over nickel plate.
2 END CONTACTS: Coin silver, with gold plate over nickel plate.
3 CENTER CONTACTS & ALL TERMINALS: Copper alloy, with gold plate
over nickel plate.
NOTE: Any models supplied with Q, B P, S ,R or G contact material are RoHS compliant.
4 END CONTACTS: Coin silver, silver plated.
5 CENTER CONTACT & ALL TERMINALS: Copper alloy, silver plated.
All models
with all options when ordered with G, S, R or Q contact material.
SEAL
E EPOXY SEAL
Third Angle
Projection
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
5 Aug 20
A-13
www.ckswitches.com
EP Series
Sealed Tiny Pushbutton Switches
Pushbutton
A
AVAILABLE HARDWARE
Cap
Cap
.200 DIA.
(5,08Ø)
.310 DIA.
(7,87Ø)
.155
(3,94)
Cap
Compatible with snap-fitting plungers
EP11 & EP12 Models. R option only.
Cap
Compatible with snap-fitting plungers
EP11 & EP12 Models. R option only.
.152
(3,86)
.080
(2,03)
00
( ,5 )
PART NO.
PART NO.
PART NO.
PART NO.
508101000 WHITE
508102000 BLACK
508103000 RED
465801000 WHITE
465802000 BLACK
465803000 RED
585A01000 WHITE
585A02000 BLACK
585A03000 RED
785A01000 WHITE
785A02000 BLACK
785A03000 RED
Material: Nylon
Finish: Gloss
Material: Nylon
Finish: Gloss
Material: Nylon
Finish: Gloss
Material: Nylon
Finish: Gloss
Not for use on S1 plunger
Not for use on S1 plunger
NOTE: Other colors available, consult Customer Service Center.
TAPE & REEL
For part number EPXX-SA/SA1
REEL INFORMATION
OUTSIDE DIAMETER
PILOT HOLE
13.00 (330,0)
.512 (13,0)
QUANTITY PER REEL 600
EP11SDISAPE
EP11FPDISAPE
Third Angle
Projection
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
5 Aug 20
A-14
www.ckswitches.com