Pushbutton
EP Series
Sealed Tiny Pushbutton Switches
Features/Benefits Typical Applications
A
Sealed against solder & T elecommunications and
cleaning processes networking equipment
Thru-hole and surface mount models Computers and peripherals
Snap-fitting actuator accepts Instrumentation and controls
standard caps
Tape & reel packaging available
RoHS compliant models available
Models Available
Specifications
Materials
CONTACT RATING: B contact material: 0.4 VA max. @ CASE & BUSHING: High temperature material, glass filled nylon 4/6,
20 V AC or DC max. See page A-13 for additional ratings.
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. PLUNGER: Thermoplastic polyester or glass filled nylon (UL 94V-0),
with internal o-ring seal. SA surface mount: High temperature
CONTACT RESISTANCE: Below 20 m9 typ. initial @
material, glass filled LCP (UL 94V-0).
2-4 V DC, 100 mA, for both silver and gold plated contacts.
9 SWITCH SUPPORT: Brass, matte-tin plated.
INSULATION RESISTANCE: 10 9 min.
CONTACTS & TERMINALS: B contact material: Copper alloy,
DIELECTRIC STRENGTH: 1000 Vrms min. @ sea level.
with gold plate over nickel plate. See page A-13 for additional
OPERATING TEMPERATURE: 309C to 859C.
contact materials.
SOLDERABILITY: Per MIL-STD-202F method 208D, or
TERMINAL SEAL: Epoxy.
EIA RS-186E method 9 (1 hour steam aging).
NOTE: Any models supplied with Q, B, P, S, R or G contact material are RoHS compliant.
DEGREE OF PROTECTION: IP57; Protection against harmful dust
deposit, full-scale voltage protection, temporary immersion.
NOTE: Specifications and materials listed above are for switches with standard options.
For information on specific and custom switches, consult Customer Service Center.
PACKAGING: Surface mount switches standard in anti-static
tape and reel packaging per EIA 481-3, see page A-14 for
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
drawings and reel information. Tape and cover strip are
PC lands to suit individual needs. Orientation relative to reflow direction may significantly
conductive for use near statically sensitive components,
impact solder joint integrity.
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-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.
Plunger
EP12 SPDT On-Mom.
S .215 high
EP21 DPST Off-Mom.
S1 .110 high
S2 .465 high
FP Flush
Seal
R Snap-fitting, .215 high
E Epoxy
Bushing
D1 Unthreaded
Terminations
Contact Material
A Right angle, PC thru-hole
B Gold
C PC Thru-hole
P Gold, matte-tin
AV Vertical right angle, PC thru-hole
Q Silver
AV3 Vertical right angle, snap-in, PC thru-hole
S Silver, matte-tin
SA Right angle, surface mount
G Gold over silver
SA1 Right angle, surface mount rear facing
R Gold over silver, matte tin
V3 Vertical mount, v-bracket
V31 Vertical mount, v-bracket, snap-in
(EP11 & EP12 only)
W Wire wrap
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
www.ckswitches.com
A-9EP Series
Sealed Tiny Pushbutton Switches
SWITCH FUNCTION
A
SWITCH FUNCTION CONNECTED TERMINALS
POS. 1 POS. 2 POS. 1 POS. 2
NO. MODEL
C&K marking on opposite side C&K marking on opposite side
POLES NO. SCHEMATIC
EP11 OFF MOM. OPEN 1-3
SPST
SP
EP12 ON MOM. 2-1 2-3
SPDT
SPDT
Omit terminal 2 for
EP11 models.
Terminal Nos.
Part number shown: EP12SD1CBE
For Reference Only
DP OFF MOM. OPEN 1-3,4-6
EP21
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 .215 HIGH S1 .110 HIGH S2 .465 HIGH FP FLUSH PLUNGER R SNAP-FITTING
S1& S2 actuators are not available with EP12 & EP21 models. FP & R actuators are not available with EP21 model.
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
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A-10
Pushbutton