C&K 3U Series
Tiny Pushwheel Switches
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
Ω
typ. @
2-4 V DC, 100 mA.
INSULATION RESISTANCE: 109
Ω
min. (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.
Thumbwheel & Pushwheel
Series
3U
Tiny pushwheel
Number of Sections
0
Switch section
Function Code
1
1 Switch section
21
BCD 1-2-4-8
2
2 Switch sections
71
BCH, 16 position
3
3 Switch sections
4
4 Switch sections
5
5 Switch sections
6
6 Switch sections
7
7 Switch sections
8
8 Switch sections
9
More than 8 switch sections
Mounting Style
0
Snap-in, front mount
Terminations
0
Short PC board
N
Short PC board with pins*
9
Any combination
Dust Lens
0
No lens
2
Dust lens
Color/Marking/Stops
0
Matte black housing, gloss black wheel, extended actuator, white vertical characters, black pushbutton, no stops
9
Combination of body colors, wheel colors, marking and/or stops
A
Matte black housing, gloss black wheel, extended actuator, white horizontal characters, black pushbutton, no stops
C
Matte black housing, gloss black wheel, recessed actuator, white vertical characters, black pushbutton, no stops
E
Matte black housing, gloss black wheel, recessed actuator, white horizontal characters, black pushbutton, no stops
N
* Note: Termination option N (RoHS compliant) replaces termination option 3 (non-RoHS compliant).
Dimensions are shown: Inch (mm)
Specifications and dimensions subject to change
N–3
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C&K 3U Series
Tiny Pushwheel Switches
SERIES
3U
1/2" TINY PUSHWHEEL WITH EXTENDED ACTUATOR
N = Number of sections.
NUMBER OF SECTIONS
0
1-8
9
Switch section only, no endplates.
Number of switch sections in assembly, includes endplates.
More than 8 switch sections, specify on CONFIGURATION FORM, page N–7 and consult Customer Service Center.
NOTE:
Endplates and blank sections available separately, see page N–6.
FUNCTION CODE
21
BCD 1-2-4-8, 10 POSITION
71
BINARY CODED HEXADECIMAL,
16 POSITION
Thumbwheel & Pushwheel
Available Terminations: 0, N
See figs. 2 & 3, page N-5.
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.
MOUNTING STYLE
0
SNAP-IN FRONT MOUNTING
N
N = Number of sections
Recommended panel thickness:
.039-.156
(0,99-3,95)
Dimensions are shown: Inch (mm)
Specifications and dimensions subject to change
N–4
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C&K 3U Series
Tiny Pushwheel Switches
TERMINATIONS
0
SHORT PC BOARD
N
SHORT PC BOARD, TYPE 0
WITH SOLDER PINS
9
ANY COMBINATION OF TERMINATION
CONFIGURATION OR SPECIAL TERMINATIONS.
Specify on configuration form, page N-7
and consult Customer Service Center.
Note: Termination option N (RoHS compliant) replaces termination option 3 (non-RoHS compliant).
PC Board 1/32" (0,79) thick.
NOTE:
All terminal holes shown may not be present for all function codes consult Customer Service Center.
Terminal Location Numbers
SOLDER PINS
Thumbwheel & Pushwheel
Fig. 1
NOTE:
See function codes, page N–4 for signal locations.
Fig. 2
COLOR/MARKING/STOPS
0
9
A
C
E
MATTE BLACK HOUSING (Gloss black wheel with extended actuator, white vertical characters, black pushbuttons, no stops.)
SPECIAL COLORS, MARKINGS FOR HOUSING OR WHEEL, STOPS (Specify on CONFIGURATION FORM, page N-7 and
consult Customer Service Center.)
MATTE BLACK HOUSING (Gloss black wheel with white horizontal characters, extended actuator, black pushbuttons, no stops.)
MATTE BLACK HOUSING (Gloss black wheel with white vertical characters, recessed actuator, black pushbuttons, no stops.)
MATTE BLACK HOUSING (Gloss black wheel with white horizontal characters, recessed actuator, black pushbuttons, no stops.)
3
3
Vertical Characters
Horizontal Characters
N
Extended Actuator
Recessed Actuator
Dimensions are shown: Inch (mm)
Specifications and dimensions subject to change
N–5
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C&K 3U Series
Tiny Pushwheel Switches
DUST LENS
0
2
NO LENS
DUST LENS (Protects character face of the wheel from abrasion and dust.)
AVAILABLE HARDWARE
Blank section, .302 THK.
(Replaces active section.)
End plates
LEFT-with hole
PART NO.
PART NO.
RIGHT-with pin
123B02000
BLACK
113B02000
LEFT-BLACK
114B02000
RIGHT-BLACK
One left and one right
piece required for
complete assembly.
Thumbwheel & Pushwheel
N
Dimensions are shown: Inch (mm)
Specifications and dimensions subject to change
N–6
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C&K 3U Series
Tiny Pushwheel Switches
Configuration Form
GRAY SHADED AREAS TO BE FILLED IN BY CUSTOMER SERVICE.
CATALOG PART NO.
C&K PART NUMBER
C&K PART NUMBER
3 U
COMPANY NAME
ADDRESS
CUSTOMER CONTACT
ORIGINATED BY
TEL.#
DATE
SALES REP.
CUSTOMER
PRINT
REVISION:
DETAILS:
PUSHWHEEL
SECTIONS
NO.
OF
SEC.
FUNCTION CODE– TERMINATIONS–
COLOR/MARKING/STOPS/SEAL–
ILLUMINATION
ENTER OPTION CODES IN APPROPRIATE BOXES. FUNCTION
CODES INCLUDE BLANK SECTIONS (SEE PAGE M-4).
DESCRIBE IN APPROPRIATE ROW
1
2
3
4
5
6
7
8
9
10
11
3 U –
3 U –
3 U –
3 U –
3 U –
3 U –
3 U –
3 U –
3 U –
3 U –
3 U –
–
–
–
–
–
–
–
–
–
–
–
PRODUCTION APPROVAL
DATE
Thumbwheel & Pushwheel
QUALITY CONTROL INSTRUCTIONS
Q.C. APPROVAL
DATE
N
REV.
INITIALS
DATE
FOR SWITCHES WITH MORE THAN 11 SECTIONS, CONTINUE ON ADDITIONAL SHEETS.
SPECIAL INSTRUCTIONS OR SPECIFICATIONS:
SHEET _____ OF _____
Dimensions are shown: Inch (mm)
Specifications and dimensions subject to change
N–7
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