C&K 3U Series
Tiny Pushwheel Switches
Features/Benefits
Typical Applications
• Tiny size saves space
• Computer peripherals
• Test equipment
• Instrumentation
• 10 and 16 position models available
• ESD clip available on select models
• Snap-in front mount saves assembly time
Specifications
Materials
CONTACT RATING:
HOUSING: Polyester (UL 94V-0).
CARRY: 1 AMP continuous.
SWITCH: 0.4 VA max., 100 mA max., 28 V DC max.
PUSHWHEEL: Polycarbonate.
PUSHBUTTON: Polyester (UL 94V-0).
OPERATING VOLTAGE: 50 mV to 28 V DC.
ELECTRICAL LIFE: 1,000,000 actuations.
ROTOR CONTACTS: Gold over nickel over copper alloy.
STATOR CONTACTS: Hard gold over nickel over copperon epoxy
fiberglass.
CONTACT RESISTANCE: Below 300 m Ω typ. @
2-4 V DC, 100 mA.
NOTE: Specifications and materials listed above are for switches with standard options.
For information on specific and custom switches, consult Customer Service Center.
9
INSULATION RESISTANCE: 10 Ω min. (dry).
DIELECTRIC STRENGTH: 500 Vrms min. @ sea level
between common terminal and any output.
Note: All models listed are RoHS compliant. See Technical Data section of this catalog for
RoHS compliant and compatible definitions and specifications.
OPERATING TEMPERATURE: –10ºC to 65ºC.
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
0
1
2
3
4
5
6
7
8
9
Switch section
Function Code
21 BCD 1-2-4-8
71 BCH, 16 position
1 Switch section
2 Switch sections
3 Switch sections
4 Switch sections
5 Switch sections
6 Switch sections
7 Switch sections
8 Switch sections
Mounting Style
Snap-in, front mount
0
Terminations
0
Short PC board
Short PC board with pins*
Any combination
Dust Lens
N
9
0
2
No lens
Dust lens
More than 8 switch sections
Color/Marking/Stops
0
9
Matte black housing, gloss black wheel, extended actuator, white vertical characters, black pushbutton, no stops
Combination of body colors, wheel colors, marking and/or stops
A
C
E
Matte black housing, gloss black wheel, extended actuator, white horizontal characters, black pushbutton, no stops
Matte black housing, gloss black wheel, recessed actuator, white vertical characters, black pushbutton, no stops
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
www.ittcannon.com
N–3