KA, K2, K9 SMT-compatible Illuminating Switch

SMT
series

Surface mounting (SMT) made possible in a world ﬁrst
for illuminating push-button switches

Maximum 70% reduction in installation costs! Improved installation quality!
■Surface-mountable terminals for fast, reliable.
■Pioneering manufacturing techniques prevent slanting and twisting during mounting, which improves counting
accuracy and reduces corrections of bent switchies and defects.
■Reduces the tilts and twists at the time of mounting by utilizing original know-how to dramatically improve
mounting accuracy.
Also, there is no need for twist adjustments after mounting, so work eﬃciency will be increased drastically.
■Easy to assemble modular switch design features separete body and lighting section. Body is mounted to PCB
and then assembled with the lighting section.
■Stable, consistent color and brightness.
■Ideal for switchers and command workstations.
Contact form

■Features:
KA: 3 size and 3 shape button. Multicolor and Dual-Color LED are available.
K2: 2 size and 3 Shape button. Dual-Color and Mono-Color LED are available.
K9: 9mm square button only. Dual-Color and Mono-Color LED are available.

Comparison of Three Models
KA

Model
Button size

17.4mm square

Button shape

Concave, Raise-Dot

K215mm square

12mm square

Button structure
Main body size

15mm square

K912mm square

9mm square

Concave, Raise-Dot, Flat

Flat

2 pcs ( Button and Color Plate)

1 pcs

15×13×12mm

10.5×7.5×12mm

Total length(including the button)
Total Travel
(max)

4.0mm

2.0mm

Life

3 million times or more

300,000 times
or moreLight color

23mm

Multicolor, Dual-Color

20mm

Dual-Color, Mono-ColorSMT
seriesSPECIFICATIONS
KA

Type

K2

K9

Gold-Plated

Contact

Maximum load: DC24V, 20 mA (resistance load)

Electrical Rating

More than100 MΩ at 500V DC

Insulation Resistance

Between terminals of the same pole: AC1000V
Dielectric Strength

Between terminals and the ground: AC1500V
At 50/60 Hz, each for 60 sec. and normal temperature and humidity
Less than 200 mΩ(Initial)at DC6V 0.05A

Contact ResistanceLess than 200mΩ(initial) at DC6V 0.1A

Electrical life

More than 3 million operations at max. rated load

More than 3 hundred thousand operations at max. rated load

Mechanical life

More than 3 million operations

More than 3 hundred thousand operations

Ambient Temperature−15℃ 〜 +50℃

Ambient Humidity

85% RH (max.)

OPERATING CHARACTERISTICS
KA、K2

Operating Force (Max.)

2.0N

Total Travel (Max.)

4.0mm

K9

Operating Force (Max.)

2.0N

Total Travel (Max.)

2.0mm

STRUCTURE
17.4mm square button

LIGHT
CARTRIDGE

concaveraise dot

15mm square button
concaveraise dot

12mm square button
ﬂatconcave raise dot

ﬂat

9mm square button
ﬂat

ButtonColor Plate

KA
Light Source

KA
Light Source

K2
Light Source

KA
Light Source

K2
Light Source

K9
Light Source

KA housing

KA housing

K2 housing

KA housing

K2 housing

K9 housing

Light Source

HOUSING
Switch main body
(Two types:
With or without click feel)2

SMT
seriesDIMENSIONS● KA Housing is common to all the buttons.
LIGHT CARTRIDGE

7
4
7.2

4
12

TOP VIEW*The height of the button is the same for the raise dot button.

13

12

1.5

MAX1.5

1.5

1.5

13

Sunmulon mark

13.6

15

7.2
4.4

Sunmulon mark

15

HOUSING

17.4mm square button

7

※

□17.4

※

BOTTOM VIEWTOP VIEW

is covered with a heat-resistant sticker.

□15

7.2

4

7

※

TOP VIEW* The height of the button is the same for the raise dot button and the flat button.
Sunmulon mark

1.5

13

12

1.5

1.5

MAX1.5

HOUSING

15

13

Sunmulon mark

13.6

15

7.2
4.4

4
12

15mm square button

7※

LIGHT CARTRIDGE

The hatched section

TOP VIEW

BOTTOM VIEW

is covered with a heat-resistant sticker.
□12

4

7

※

TOP VIEW* The height of the button is the same for the raise dot button and the flat button.

15

13

12

1.5

MAX1.5

1.5
1.5

13
13.6

The hatched section

7.2
4.4

Sunmulon mark

15

HOUSING

12.6

7.2

LIGHT CARTRIDGE

74
1212mm square button

The hatched section

※

12.6

Sunmulon markTOP VIEW

12.6

BOTTOM VIEW

is covered with a heat-resistant sticker.
Tolerance : ±0.4 mm

3

SMT
seriesDIMENSIONS

4
12

□15

7

4

7

※

TOP VIEW* The height of the button is the same for the raise dot button and the flat button.
White

1.4
7.5

1.2

1.2

Sunmulon mark

7.5

1.2
10.5

TOP VIEW

11.6

The hatched section

7.3

BOTTOM VIEW

is covered with a heat-resistant sticker.

※

□12

7

4

7

LIGHT CARTRIDGE

12

4

7

※

TOP VIEW* The height of the button is the same for the raise dot button and the flat button.
White

Sunmulon mark

7.5

1.4

10.5

12

HOUSING

12mm square button

Sunmulon mark

10.5

12

HOUSING

15mm square button

7※

LIGHT CARTRIDGE● K2 Housing is common to all the buttons.

1.2

1.2

7.3

7.5

1.2
10.5

11.6

The hatched section

is covered with a heat-resistant sticker.

9

2.5

5.5

LIGHT CARTRIDGE□9TOP VIEW

Sunmulon mark

10.5

12

7.5

1.4

Black

HOUSING

129mm square button

2.5

5.5

● K9

1.2

1.2
1.2
10.5

The hatched section

7.5
11.6

Sunmulon markTOP VIEW

7.3

BOTTOM VIEW

is covered with a heat-resistant sticker.
Tolerance : ±0.4 mm

4SMT
series

INTERNAL CONNECTION ARRANGEMENTS■ KA

Dual-color

Multicolor
LED color combination

Terminals

Sunmulon mark
BOTTOM VIEW

■ K2

Sunmulon markTOP VIEW

BOTTOM VIEW

LC

LC

L1

L1

BOTTOM VIEWTOP VIEW

L2Red

Super green

Super green
Super blue

LC-L1

BOTTOM VIEW

LED color combination
Dual-color（78）Dual-color（718）Mono-color

Red

Red

Green

Super green

Red Green Yellow

LC-L2

TOP VIEW

Dual-color
LC

LC

L1

L1

TOP VIEW

LED color combination

Terminals

LC

L2

LC-L1

Sunmulon mark
BOTTOM VIEW

Red

Green

Terminals

LC

Sunmulon markMono-color
LC

Red

LC-L2
LC-L3

TOP VIEW

Sunmulon mark

■ K9

LC-L1

Dual-color

Mono-color
LC

Dual-color（78） Dual-color（718） Multicolor（22）

Sunmulon mark
BOTTOM VIEW

Dual-color（78）Dual-color（718）Mono-color

Red

Red

Green

Super green

Red Green Yellow

LC-L2

TOP VIEWTERMINALS LAYOUT
■ KA

■ K2、
K9
Dual-color

Multicolor

Mono-color
LC

LC

L1

BOTTOM VIEW

BOTTOM VIEW

Dual-color

S1

LC

LC

S1

S2

L1

L2

S2

BOTTOM VIEW

BOTTOM VIEWTERMINAL SHAPE / PCB LAYOUT■ KA
Recommended PCB Layout

4.5 4.5

Boss A

6.1

φ1.18

φ0.8

φ1.18

φ0.9

1.8±0.1

φ1.4±0.1

2.4＋0
−0.1

12.6

9

TOP VIEW■ K2、
K9
Boss dimensions

Recommended PCB Layout

Boss A
3

φ0.8

R0.1

φ1.18

＋0.1

2.1 −01.2 −07.3

7±0.05

BOTTOM VIEWTOP VIEW

5

＋0

＋0.1

φ1.2 −0

1.8 ±0.1

13.6 −0.1

Boss B

3 ±0.05
2-R0.6
＋0.1

1.5

1.4

0.5

Boss A / B＋0.1

7.3 ±0.1

1.2

1.4 ±0.05

Terminal dimensions
Sunmulon markφ1.2 ＋0.1−0±0.05

BOTTOM VIEW

7

＋0.1

4.4±0.1

＋0.1

1.2−0

1

2

φ0.8

6.1±0.05

6.1 −0Boss B

Boss C

6.6 −0

φ0.8

0.6

2

Boss B

0.6

7.2

Boss A
4.4

13.6

Boss C12.6±0.1

4-R0.61.5＋0Sunmulon mark14.6 −0.1

Boss dimensions

2.2±0.05

Terminal dimensions

SMT
series

LED RATINGS / PROTECTIVE RESISTANCE■ KA●LED ratings
Full-face LED lighting（Ta=25℃）
Color

Item

Dual-color（78）Dual-color（718）

Red

Green

Red

Super green

Red

Multicolor（22）

25

20

20

10

50

35

25

127

124

88.7

Super green Super blue

Max. operating current

ＩＦＭ（ｍＡ）

Power Dissipation（ｍW）

DC reverse voltage

ＶR（Ｖ）

5

10

5

5

5

−

−

ＶＦ（Ｖ）(standard values) ※

1.9

4.2

1.8

3.4

2.2

3.2

3.2

※

626

572

626

525

622

530

468

20

20

10
400

10
15

20
10 4

20
10 4

20
10 4

50

150

110

Forward voltage
Dominant wavelength60λdForward current under the conditions of the above-mentioned ※ IF （mA）
Pulse width PW（μs）
Conditions
ＤＲ
when pulse Duty ratio
is litAllowable forward current for pulse ＩFP(mA）

48

400

10 -1

Figure 1

B

Figure 5

Refer to the following formula to calculate external resistance values.
R＝Vcc Vcc Vcc
R R
IF IF IF

80

Figure 2
Figure 4

Figure 3
R G(Figure 1)

150 (simultaneous lighting)

10 -1
92

92

VF

Vcc Vcc
IF IF R R

38

10 -1

Wiring diagram
Maximum Forward Current(including internal temperature)

VF

48

R

VCC−VFIF

VF : LED forward voltage
VCC : Power supply voltage
IF: Recommended operating current(Figure 2)

Single-color lighting (green)

Simultaneous lighting(green)Simultaneous lighting (red)０Maximum forward current (mA)

Single-color lighting (red)Maximum forward current (mA)

Maximum forward current (mA)

● Maximum forward current − Ambient temperature

Single-color lighting(red)Simultaneous lighting (red)Single-color lighting (super green)
Simultaneous lighting(super green)０Single-color lighting (red)30Single-color lighting(super green, super blue)

20

10

Simultaneous lighting (super green)
Simultaneous lighting(super blue)
Simultaneous lighting (red)

0

20

40

60

Ambient temperature (℃)

Ambient temperature (℃)(Figure 3)(Figure 4)(Figure 5)●Reference external resistor
Buttonsize

KA17.4 squareKA
15 square

Color
VoltageKA

100

Ta=25℃
Dual-color（718）Dual-color（78）
Red

Green

Red

Super green

Multicolor（22）RedSuper green

Super blue

5V390Ω 1/16W

56Ω 1/16W

300Ω 1/16W

510Ω 1/16W 1.5kΩ 1/16W

1.2kΩ 1/16W

1.8kΩ 1/16W

12V

1.3kΩ 1/4W

510Ω 1/4W

1kΩ 1/4W

2kΩ 1/8W

4.7kΩ 1/16W

5.1kΩ 1/16W

6.8kΩ 1/16W

24V

2.7kΩ 1/2W

1.3kΩ 1W

2.2kΩ 1/2W

4.7kΩ 1/4W

10kΩ 1/8W

12kΩ 1/8W

16kΩ 1/16W

8

15

10

5

2.2

1.8

1.4

Reference operating
current(mA)

5V

510Ω 1/16W

91Ω 1/16W

360Ω 1/16W

620Ω 1/16W 1.6kΩ 1/16W

1.5kΩ 1/16W

2kΩ 1/16W

12V

1.6kΩ 1/4W

820Ω 1/4W

1.2kΩ 1/4W

2.4kΩ 1/8W

5.1kΩ 1/16W

6.2kΩ 1/16W

8.2kΩ 1/16W

24V

3.6kΩ 1/2W

2kΩ 1/2W

2.7kΩ 1/2W

5.6kΩ 1/4W

11kΩ 1/8W

15kΩ 1/16W

18kΩ 1/16W

6

10

8

4

2

1.4

1.2

620Ω 1/16W 130Ω 1/16W

510Ω 1/16W

910Ω 1/16W

2kΩ 1/16W

1.8kΩ 1/16W

2.4kΩ 1/16W

Reference operating
current(mA)

5V
12 square

80

Ambient temperature (℃)

12V

2kΩ 1/8W

1kΩ 1/4W

1.6kΩ 1/4W

3.6kΩ 1/16W 6.2kΩ 1/16W

8.2kΩ 1/16W

10kΩ 1/16W

24V

4.3kΩ 1/4W

2.4kΩ 1/2W

3.6kΩ 1/2W

8.2kΩ 1/8W

13kΩ 1/8W

18kΩ 1/16W

22kΩ 1/16W

5

8

6

3

1.7

1.2

1

Reference operating
current(mA)

6

SMT
series

LED RATINGS / PROTECTIVE RESISTANCE■ K2、K9●LED ratings
Mono-color

Color

Item

Red

Full-face LED lighting（Ta=25℃） □15, □12, □9
Dual-color（78）Dual-color（718）

Yellow

Red

Green

Red

Super green

Figures in [ ] indicate □15

Green

ＩＦＭ（ｍＡ）

25

20

25

25
（17）※

20（14）※

20（16）
※

10（8）
※

（ｍW）

60

48

60

60

48

48

38

ＶR（Ｖ）

5

5

5

5

5［10］

5

5

ＶＦ（Ｖ）(standard values) ※

1.9

2.1

1.9

1.9

2.1［4.2］

1.8

3.4

※

626

572

595

626

572

626

525

Forward current under the conditions of the above-mentioned ※ IF （mA）

20

20

20

20

20

10

10

Max. operating current
Power Dissipation
DC reverse voltage
Forward voltage
Dominant wavelength
Conditions
when pulse
is litλdPulse width

PW（μs）

400

400

Duty ratio

ＤＲ

10 -1

10 -1

92

92

Allowable forward current for pulse ＩFP(mA）

400
92

Figure 6

Wiring diagram
Maximum Forward Current(including internal temperature)

15
10 -1
50

Figure 7

Figure 8

Figure 9

Figure 10※ In case of Simultaneous lighting, please follow the figures in （ ）.
Refer to the following formula to calculate external resistance values.

VF
Vcc

VF
Vcc Vcc

R

IF

IF(Figure 6)IF

VCC−VFIF

R＝

VF : LED forward voltage
VCC : Power supply voltage
IF

R R: Recommended operating current(Figure 7)30 Single-color lighting (red, yellow)
20

Single-color lighting (green)

10

0

20

40

60

80

30

Single-color lighting (red)Single-color lighting (green)
20 Simultaneous lighting (red)Simultaneous lighting (green)

10

0

100

20

40

60

80

Maximum forward current (mA)

Maximum forward current (mA)

Maximum forward current (mA)

● Maximum forward current − Ambient temperature

100

30

Single-color lighting (red)20 Simultaneous lighting (red)Single-color lighting (super green)

10

Simultaneous lighting(super green)

0

20

40

60

Ambient temperature (8℃)

Ambient temperature (8℃)

Ambient temperature (8℃)

(Figure 8)(Figure 9)(Figure 10)●Reference external resistor
Buttonsize
Voltage
K2
15 squareK2
12 squareK9
9 square

80

Color

100

Ta=25℃
Dual-color（78）Mono-color（7）（8）（9）

Dual-color（718）

Red

Green

Yellow

Red

Green

Red

Super green

5V

510Ω 1/16W

91Ω 1/16W

300Ω 1/16W

510Ω 1/16W

91Ω 1/16W

360Ω 1/16W

620Ω 1/16W

12V

1.6kΩ 1/4W

820Ω 1/4W

1kΩ 1/4W

1.6kΩ 1/4W

820Ω 1/4W

1.2kΩ 1/4W

2.4kΩ 1/8W

24V

3.6kΩ 1/2W

2kΩ 1/2W

2.2kΩ 1/2W

3.6kΩ 1/2W

2kΩ 1/2W

2.7kΩ 1/2W

5.6kΩ 1/4W

6

10

10

6

10

8

4

Reference operating
current(mA)

5V

620Ω 1/16W

270Ω 1/8W

330Ω 1/16W

620Ω 1/16W

270Ω 1/8W

510Ω 1/16W

910Ω 1/16W

12V

2kΩ 1/8W

910Ω 1/4W

1.1kΩ 1/4W

2kΩ 1/8W

910Ω 1/4W

1.6kΩ 1/4W

3.6kΩ 1/16W

24

4.3kΩ 1/4W

2kΩ 1/2W

2.4kΩ 1/2W

4.3kΩ 1/4W

2kΩ 1/2W

3.6kΩ 1/2W

8.2kΩ 1/8W

5

11

9

5

11

6

3

Reference operating
current(mA)

5V

910Ω 1/16W

390Ω 1/16W

470Ω 1/16W

910Ω 1/16W

390Ω 1/16W

750Ω 1/16W 1.2kΩ 1/16W

12V

3kΩ 1/8W

1.3kΩ 1/4W

1.6kΩ 1/4W

3kΩ 1/8W

1.3kΩ 1/4W

2.4kΩ 1/8W

4.7kΩ 1/16W

24V

6.8kΩ 1/4W

2.7kΩ 1/2W

3.6kΩ 1/2W

6.8kΩ 1/4W

2.7kΩ 1/2W

5.1kΩ 1/4W

11kΩ 1/8W

4

8

6

4

8

4

2

Reference operating
current(mA)

7

SMT
series

□10.2

□11.6

□9.8

For 15mm square button

0.8

0.8

0.8

For 17.4mm square button

1.9

□12.2

□13.9

1.9

□14.6

1.9

COLOR PLATE DIMENSIONS

For 12mm square button

REPLACEMENT PARTS
Button size

Concave button

Raise dot button

17.4mm square

KA-4590-1CC

KA-4590-2CC

15mm square

KA-4768-1CC

KA-4768-2CC

KA-4769-1CC

KA-4770-LM

12mm square

KA-4603-1CC

KA-4603-2CC

KA-4730-1CC

KA-4604-LM

9mm square

Flat button

Color Plate
KA-4591-LM

K9-4707-LM

SOLDERING SPECIFICATIONS*Soldering(1) Conduct preliminary testing for conﬁrming the soldering conditions.
Switches could be deformed by heat depending on the , pattern and land on the PCB.
(2) The number of soldering is no more than twice, including corrective re-soldering.
When soldering repeatedly, wait at least ﬁve minutes between the ﬁrst and second soldering until the work cools to room temperature.
Continuous heating can result in deformity of outer contours and deterioration.

*Recommended conditions for reflow soldering (when attaching single terminal)
Please set a reﬂow furnace referring to the temperature proﬁle example shown below for the terminal temperature.
Deformity could result due to the heat if the product temperature exceeds 260℃,therefore ensure that the temperatureon the product surface remains below 260℃.
Pre-heating : 150℃ to 180℃
60 to 120 sec
Reﬄow: 220℃ or above
Within 30 to 60 sec
Solder type : Sn 96.5
Ag 3
Cu 0.5*A30C5 (JIS indication)[Temperature profile example when lead-free solder is used]

250℃
220℃
180℃
150℃

* Consult with us if you wish to attach parts
continuously or in high density.

60 ~ 120s

60s max*Manual soldering(1) Soldering temperature: 350℃ or less at tip of soldering iron.
(2) Soldering time: within 3 sec*Cleaning
The switches are not washable.
Washing may cause ﬂux and foreign matter on the PCB to get inside the switch along with cleaning ﬂuid, and could cause failure.

*PCB(1) We recommend conﬁrming thickness of the PCB, pattern on the PCB and land prior to volume production.
These are aﬀected for heat-resistant of swithches.
(2) Handle the PCB carefully after attaching the switches.
The powder generated when dividing the PCB could get inside the switches.
Avoid piling assembled PCB.

8

SMT
seriesORDERING CODE
■ KA

KA

LIGHT CARTRIDGE● OPERATIONAL FEEL ※2）● BUTTON
12

12 square

Blank

Without click feel15

15 square

M

With click feel1717.4 square● BUTTON SHAPE
K

Concave buttonP

Raise dot button

※ S
※1） X

Without button● COLOR PLATE
4

※1） X

Milky white
Without color plate

Flat button※Flat button is only 12 and 15 square type.
● BUTTON COLOR● LED COLOR
78

※1） X

718 Red and super green
22

MulticoloredX

Without LED

HOUSING● CIRCUIT CHARACTERISTICAND OPERATIONAL FEEL※2）
Momentary, without click feelM

Momentary, with click feel

Without button

KM

KA

S

Clear

C

Red and green● TERMINAL
M

Surface-mounted terminal● HOUSING COLOR
K

Black

*Caution※1) In case of selecting without button(X), without color plate(X), please order button and color plate separately.
※2) If you request M (with click feel) for the operational feel of the housing, also specify M (with click feel) for the operational feelof the light cartridge.
In case you request S (without click feel) for the operation feel of the housing, specify blank for the operational feel of the light
cartridge. Other combinations cannot be selected.

*LED protection
For protecting LED, please apply suitable external current limiting resistors.

9

SMT
seriesORDERING CODE
■ K2

K2

LIGHT CARTRIDGE● COLOR PLATE● BUTTON
12

12 square

15

15 square

4

※1） X

● BUTTON SHAPE
K

Concave buttonP

Raise dot button● BUTTON COLOR
Clear

C

※1） X

Flat button

S

※1） X

Milky white
Without color plate

Without button

Without button● LED COLOR
7

Red

8

Green

9

Yellow

78

Red and Green718 Red and Super GreenX

Without LED

K2

HOUSINGKM● CIRCUIT CHARACTERISTICAND OPERATIONAL FEEL※2）
S

Momentary, without click feelM

Momentary, with click feel

● TERMINAL
M

Surface-mounted terminal● HOUSING COLOR
K

Black

Caution※1) In case of selecting without button(X), without color plate(X), please order button and color plate separately.
※2) With or without click feel cannot be selected for the light cartridge. They can be selected for the housing only.

*LED protection
For protecting LED, please apply suitable external current limiting resistors.

10

SMT
seriesORDERING CODE
■ K9

K9

LIGHT CARTRIDGE

9X● COLOR PLATE● BUTTONX

9 square9● BUTTON SHAPE● BUTTON COLOR

Square ﬂat

S

※1） X

Without color plate

M

Without button※1） X

Milky white
Without button● LED COLOR
7

Red

8

Green

9

Yellow

78

Red and green

718 Red and super green
X

Without LED

K9

HOUSINGKM● CIRCUIT CHARACTERISTICAND OPERATIONAL FEEL ※2）
M

Momentary, with click feelS

Momentary, without click feel

● TERMINAL
M

Surface-mounted terminal● HOUSING COLOR
K

Black

*Caution※1) In case of selecting without button(X), please order button separately.
※2) With or without click feel cannot be selected for the light cartridge. They can be selected for the housing only.
*LED protection
For protecting LED, please apply suitable external current limiting resistors.

11

SMT
series

PACKAGING SPECIFICATIONS■ KA●The Housing of KA-type switches is delivered in a tray. Tray speciﬁcations are as shown below.
315
P23×11=253±0.2

B

B

18.5

Tray index

Section A details

16.8

230

P24×7=168±0.2

16

（31）

（31）

If ordered in 32 units or less, the order will be delivered
in a product box. Trays, if needed, can be ordered by
specifying the following product name and type.
15.6

A

Tray

KA-4600

Type

The light cartridge is always delivered in a product box.

1

22

B-B cross-section■ K2、K9●The Housing of K2-type and K9-type switches is delivered in a tray. Tray speciﬁcations are as shown below.
315
（31）

P23×11=253 ±0.2

B

18.5

Tray index

Section A details

12.4

230

P24×7=168 ±0.2

16B

Trays, if needed, can be ordered by specifying the following
product name and type.

（31）

A

Tray

1

22

13.6

B-B cross-sectionTypeK2-4704

The ligh cartridge is always delivered in a product box.

SURFACE MOUNTING PROCESS①Mouting the housing to the PCB.
(by Mounter, ordinally )②Reﬂow soldering④Combining light cartridge
to housing.
Completion③Pealing
heat-resist ﬁlm.
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SMT
seriesHandling Instructions● Mounting the KA light cartridge
concave groovepart B

convexpart B

convexpart A
concave groovepart A* To combine the light cartridge with the housing, remove the seal attached to the housing. There is a proper direction for combining the light cartridgewith the housing. As shown in the above diagram, insert the light cartridge by aligning the convex part A with concave groove part A,
and convex part B with concave groove part B.

● Mounting the K2 light cartridge● Mounting the K9 light cartridge

concave groovepart B

concave groovepart B

convex clasp
part B

convex clasp
part B

convex clasp
part Arconcave groovepart A

concave groovepart A

convex clasp
part A* There is a proper direction for combining the light cartridge and housing.
As shown in the above diagram, insert the light cartridge by aligning the convex clasp part A with concave groove part A, and convex clasp part B
with concave groove part B.

HANDLING PRECAUTIONS*Handling of switches(1) Usage environment
Prior to setting the product in the environment for actual usage, check that no corrosive or other gas is emitted from component parts in the vicinity.
Avoid using in atmospheres containing sulﬁdizing gas (H2S, SO2), ammonia gas (NH3), nitrate gas (NH3), chlorine gas (CL2) or other corrosive gases, orunder high temperature or humidity.
(2) Contact errors could result if silicon is present in the vicinity of the switch.
Remove the source of silicon if silicon oil, silicon ﬁller, silicon wire or other silicon products are present around the switch.
(3) Dust-prevention measures
Avoid using the switches in places where dust is generated.
(4) Waterprooﬁng and drip-prooﬁng
The switches are not waterproof or drip-proof. Avoid installing or using them in places where they might be splashed with liquids.
(5) Automatic mounting
The switches can be mounted on PCB by mounter, but this may not be possible with some types of mounting machines. We recommend checking
beforehand when using the product this way.
(6) Strength of terminals
Note that if a terminal is bent or twisted, its strength declines and the terminal could break.

*Notes on storage(1) Storage environment
When storing the product, please take full consideration that the atmosphere, humidity and other storage conditions could aﬀect the ease of soldering ofterminals and packaging functions.
-Packaging material is expected to age more rapidly under high temperatures and humidity. We recommend storing the products indoors at temperatures
up to 25 8C and relative humidity up to 50%.
-Avoid storing the products in an environment with sulﬁdizing or other corrosive gases.
-Avoid direct sunlight and dust.
(2) Storage conditions
Store the products in the packaging.
12mm square
17.4 mm square
15mm square
Use products promptly after opening the packaging, and store the remaining products in an area
buttonbuttonbuttonfree of gas, humidity and other factors which might aﬀect performance.
00
Handle the products carefully to prevent damage to terminals from deforming.
□11.6 -0.2
□9.8 0-0.2□13.9 -0.2

*Character films

The character ﬁlm is not included in the package. To use the character ﬁlm, use a heat resistant ﬁlm of
0.1mm thickness or less.
Please see the ﬁgure at right for dimensions.

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