Key Switches
DIGITAST
Microminiature SPDT, Key Switches
Features/Benefits Typical Applications
High reliability/long life Medical
Designed for low level Instrumentation
switching
Industrial electronics
Ready to implement on PCB
Audio electronics
Latching function available
Several button options
RoHS compliant and compatible
Construction Electrical
FUNCTION: momentary or push-push SWITCHING POWER MAX.: 240 mW DC
CONTACT ARRANGEMENT: 1 change over contact SPDT, NO SWITCHING VOLTAGE MAX.: 24 V DC
MODE OF SWITCHING: Non-shorting SWITCHING CURRENT MAX.: 10 mA DC
DISTANCE BETWEEN BUTTON CENTERS: CARRYING CURRENT AT 20C (push-push version): 100 mA
HORIZONTAL MINIMUM: 12,7 (0.500) or 17,78 (0.700)
DIELECTRIC STRENGTH (50 Hz, 1 min): 500 V
VERTICAL MINIMUM: 17,78 (0.700)
OPERATING LIFE with or without max. switching power
6
TERMINALS: PC pins
Momentary: 5 x 10 operations
5
MOUNTING: Soldering, centering pins Push-push: 5 x 10 operations
CONTACT RESISTANCE: Initial 50 m
6
After 5 x 10 operations: 100 m
Mechanical
10
INSULATION RESISTANCE: 10
TOTAL TRAVEL: 3 (.0018)
CAPACITANCE at f= 10 kHz: 0.8pF
SWITCHING TRAVEL: 1,5 (0.0591)
BOUNCE TIME: 2.5 ms
LATCHING TRAVEL: 1,8 (0.0709)
Operating speed 400 mm/s (15.75/s)
OPERATING FORCE: 1.5 +/- 0.5 N (150 +/- 50 grams)
Process Environmental
SOLDERABILITY: OPERATING TEMPERATURE: -25C to 85C.
Wave soldering, compatible with lead free soldering profile
Hand soldering, 350C for 3 seconds
How To Order
Our easy build-a-switch concept allows you to mix and match options to create the switch you need. To order, select
desired option from each category and place it in the appropriate box. Some of the configurations may not be available
or could require some development.
Switch
A U
Series
D
1st LED Color***
SER Narrow button
Function
NONE No LED
SET Wide button
EE Latching
RD Red
SERU Switch body
OA Non-latching
YE Yellow
only (no button)
GN Green
Contact Material
LED
AU Gold
NONE No LED LED Spacing*
Reference
L 1 LED
NONE Narrow LED Spacing
SER BK AU OA Button Color**
2L 2 LEDs
(TYP Europe)
None (SERU) Body Color
2nd LED Color***
7.62 Wide LED Spacing
NONE White (STD)
BK Black
NONE No LED
(TYP No. America)
BRN Brown
GY Gray
RD Red
WH White
YE Yellow
RD Red
GN Green
BU Blue
Button
K
Reference
Button Style
SRK BK
LED Holes
SR Narrow
NONE No LED holes
Button Color**
ST Wide
L 1 LED hole
BK Black
2L 2 LED holes
GY Gray
Latching
WH White
None For use with momentary switch
* LED spacing only applies when 1 LED requested
RD Red
EE With EE staple for latching
** Additional button colors available by request
BU Blue
*** Additional LED colors available by request including Bi color configurations
Dimensions are shown: mm
Specifications and dimensions subject to change
www.ckswitches.com
D25DIGITAST
Microminiature SPDT, Key Switches
DESIGNATION
SER NARROW BUTTON
17,5
(0.680)
Total travel
3 (0.118)
Switching travel 1.5 (0.0591)
(0.2)(5,08 5,08 0.2)
0,4
10,16
[0.0157]
(0.4)
1 0,7
14,74
(0.0394) (0.0276)
(0.6)
SER SERL SER2L
1st LED
2nd LED
17,1
(0.673)
SET WIDE BUTTON
Total travel
3 (0.118)
Switching travel 1.5 (0.0591)
SET SETL SET2L
1st LED
2nd LED
17,1
(0.673)
17.3
SERU NO BUTTON
[0.681]
15.24
[0.6]
D
5.08
[0.2]
1
[0.0394]
0.4
[0.015]
0.7
[0.0276]
Dimensions are shown: mm
Specifications and dimensions subject to change
www.ckswitches.com
D26
Key Switches
7,62
7.9
(0.3)
2,54
7.62
[0.311]
2
(0.1)
[0.3]
[0.787]
0.5
[0.0197]
0 0 0 0
2 2
21 21
12,3
17,3
12,3
(0.484)
(0.681)
0
0
(0.484)
2
21
4.5 12.3
[0.484]
[0.177]
14,3
14,3
(0.563)
(0.563)
8
(0.315)
1
(0.0394)
4,5
(0.177)