C&K 3U Series
Tiny Pushwheel Switches
N
Thumbwheel & Pushwheel
N–3
Dimensions are shown: Inch (mm)
Specifications and dimensions subject to change
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Features/Benefits
•Tiny size saves space
•10 and 16 position models available
•ESD clip available on select models
•Snap-in front mount saves assembly time
Typical Applications
•Computer peripherals
•Test equipment
•Instrumentation
Specifications
CONTACT RATING:
CARRY: 1 AMP continuous.
SWITCH: 0.4 VA max., 100 mA max., 28 V DC max.
OPERATING VOLTAGE: 50 mV to 28 V DC.
ELECTRICAL LIFE: 1,000,000 actuations.
CONTACT RESISTANCE: Below 300 m Ωtyp. @
2-4 V DC, 100 mA.
INSULATION RESISTANCE: 109Ωmin. (dry).
DIELECTRIC STRENGTH: 500 Vrms min. @ sea level
between common terminal and any output.
OPERATING TEMPERATURE: –10ºC to 65ºC.
Materials
HOUSING: Polyester (UL 94V-0).
PUSHWHEEL: Polycarbonate.
PUSHBUTTON: Polyester (UL 94V-0).
ROTOR CONTACTS: Gold over nickel over copper alloy.
STATOR CONTACTS: Hard gold over nickel over copperon epoxy
fiberglass.
NOTE: Specifications and materials listed above are for switches with standard options.
For information on specific and custom switches, consult Customer Service Center.
Note: All models listed are RoHS compliant. See Technical Data section of this catalog for
RoHS compliant and compatible definitions and specifications.
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 N–4 thru N–6. For additional options not shown in catalog, consult Customer Service Center.
Consult factory for illumination availability.
Series
3U Tiny pushwheel
Number of Sections
0Switch section
11 Switch section
22 Switch sections
33 Switch sections
44 Switch sections
55 Switch sections
66 Switch sections
77 Switch sections
88 Switch sections
9More than 8 switch sections
Dust Lens
0No lens
2Dust lens
Function Code
21 BCD 1-2-4-8
71 BCH, 16 position
Terminations
0Short PC board
NShort PC board with pins*
9Any combination
Color/Marking/Stops
0Matte black housing, gloss black wheel, extended actuator, white vertical characters, black pushbutton, no stops
9Combination of body colors, wheel colors, marking and/or stops
AMatte black housing, gloss black wheel, extended actuator, white horizontal characters, black pushbutton, no stops
CMatte black housing, gloss black wheel, recessed actuator, white vertical characters, black pushbutton, no stops
EMatte black housing, gloss black wheel, recessed actuator, white horizontal characters, black pushbutton, no stops
Mounting Style
0Snap-in, front mount
* Note: Termination option N (RoHS compliant) replaces termination option 3 (non-RoHS compliant).
C&K 3U Series
Tiny Pushwheel Switches
SERIES
NUMBER OF SECTIONS
FUNCTION CODE
MOUNTING STYLE
N
Thumbwheel & Pushwheel
N–4
Dimensions are shown: Inch (mm)
Specifications and dimensions subject to change
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N = Number of sections.
0SNAP-IN FRONT MOUNTING
71 BINARY CODED HEXADECIMAL,
16 POSITION
21 BCD 1-2-4-8, 10 POSITION
9More than 8 switch sections, specify on CONFIGURATION FORM, page N–7 and consult Customer Service Center.
1-8 Number of switch sections in assembly, includes endplates.
0Switch section only, no endplates.
3U 1/2" TINY PUSHWHEEL WITH EXTENDED ACTUATOR
NOTE: Endplates and blank sections available separately, see page N–6.
Available Terminations: 0, N
See figs. 2 & 3, page N-5.
N = Number of sections
Recommended panel thickness:
.039-.156
(0,99-3,95)
Available Terminations: 0, N
See fig. 2, page N-5.
NOTE: ESD pin available, consult Customer Service Center.
For terminal location diagrams, see page N–5.
C&K 3U Series
Tiny Pushwheel Switches
TERMINATIONS
COLOR/MARKING/STOPS
N
Thumbwheel & Pushwheel
AMATTE BLACK HOUSING (Gloss black wheel with white horizontal characters, extended actuator, black pushbuttons, no stops.)
EMATTE BLACK HOUSING (Gloss black wheel with white horizontal characters, recessed actuator, black pushbuttons, no stops.)
CMATTE BLACK HOUSING (Gloss black wheel with white vertical characters, recessed actuator, black pushbuttons, no stops.)
9SPECIAL COLORS, MARKINGS FOR HOUSING OR WHEEL, STOPS (Specify on CONFIGURATION FORM, page N-7 and
consult Customer Service Center.)
0MATTE BLACK HOUSING (Gloss black wheel with extended actuator, white vertical characters, black pushbuttons, no stops.)
9ANY COMBINATION OF TERMINATION
CONFIGURATION OR SPECIAL TERMINATIONS.
NSHORT PC BOARD, TYPE 0
WITH SOLDER PINS
0SHORT PC BOARD
PC Board 1/32" (0,79) thick.
NOTE: All terminal holes shown may not be present for all function codes consult Customer Service Center.
NOTE: See function codes, page N–4 for signal locations.
Terminal Location Numbers
Specify on configuration form, page N-7
and consult Customer Service Center.
Extended Actuator
Recessed Actuator
3
Vertical Characters
3
Horizontal Characters
Fig. 1
SOLDER PINS
N–5
Dimensions are shown: Inch (mm)
Specifications and dimensions subject to change
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Note: Termination option N (RoHS compliant) replaces termination option 3 (non-RoHS compliant).
C&K 3U Series
Tiny Pushwheel Switches
DUST LENS
AVAILABLE HARDWARE
N
Thumbwheel & Pushwheel
2DUST LENS (Protects character face of the wheel from abrasion and dust.)
0NO LENS
Blank section, .302 THK.
(Replaces active section.)
PART NO.
123B02000 BLACK
End plates
LEFT-with hole RIGHT-with pin
One left and one right
piece required for
complete assembly.
PART NO.
113B02000 LEFT-BLACK
114B02000 RIGHT-BLACK
N–6
Dimensions are shown: Inch (mm)
Specifications and dimensions subject to change
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C&K 3U Series
Tiny Pushwheel Switches
N
Thumbwheel & Pushwheel
N–7
Dimensions are shown: Inch (mm)
Specifications and dimensions subject to change
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QUALITY CONTROL INSTRUCTIONS PRODUCTION APPROVAL DATE
C&K PART NUMBER
REV. INITIALS DATE
3
CATALOG PART NO.
COMPANY NAME CUSTOMER
PRINT
REVISION:
ADDRESS TEL.#
CUSTOMER CONTACT DATE
ORIGINATED BY SALES REP.
DETAILS:
Q.C. APPROVAL DATE
Configuration Form
GRAY SHADED AREAS TO BE FILLED IN BY CUSTOMER SERVICE.
SHEET _____ OF _____
C&K PART NUMBER
10
11
1
2
3
4
5
6
7
8
9
PUSHWHEEL
SECTIONS
DESCRIBE IN APPROPRIATE ROW
SPECIAL INSTRUCTIONS OR SPECIFICATIONS:
3 U
FUNCTION CODE– TERMINATIONS–
COLOR/MARKING/STOPS/SEAL–
ILLUMINATION
FOR SWITCHES WITH MORE THAN 11 SECTIONS, CONTINUE ON ADDITIONAL SHEETS.
ENTER OPTION CODES IN APPROPRIATE BOXES. FUNCTION
CODES INCLUDE BLANK SECTIONS (SEE PAGE M-4).
NO.
OF
SEC.
–
3 U –
3 U –
3 U –
3 U –
3 U –
3 U –
3 U –
3 U –
3 U –
3 U –
U
–
–
–
–
–
–
–
–
–
–
–