FHFH Illuminated Pushbutton Switch
Only 19.8 mm depth behind panel
with built-in resistor.
■ Depth behind panel：Only 19.8 mm■ LED Full-Face, Spot illumination available.
■ Terminal：Soldering■ Accessories：Barriers, Guard covers, Sockets

NC
Switchconnection

C
NO

CHARACTERISTICS
Square：□11.4 mm

Button Size
Contact Material
Rating (Resistive Load)

Rectangle：11.4×16.4 mm

Silver contact (Gold-plated)

Cross-bar contact

AC125V 5A
AC250V 5A

AC125V 0.1A
DC30V 0.1A

Insulation ResistanceMore than 100 MΩ at DC 500 V

Dielectric Strength

AC 1000 V RMS between NC and NO terminal
AC 1500 V RMS between terminals and ground50/60 Hz for 60 sec. at normal ambient temperature and humidity

AC 600 V RMS between NC and NO terminal
AC 1500 V RMS between terminals and ground50/60 Hz for 60 sec. at normal ambient temperature and humidity

Contact ResistanceLess than 30 mΩ (Initial value)at DC 6 V 1 A

Less than 50 mΩ (Initial value)at DC 6 V 0.1 A

Vibration ResistanceMechanicalLife

Momentary
AlternateElectrical Life (Resistive Load)

10 to 55 Hz, Amplitude 1.5 mm
More than 500,000 operations
More than 200,000 operations
More than 30,000 operations at max. rated load

Operating Force

4.41N

max.

Total Travel

2.5mm

max.

WeightAmbient Operating Temperature
Ambient Operating Humidity

Square：5.5 g

Rectangle：6 g－15℃ to 50℃（No Freeze, No Condensation）
80%RH max. （No Condensation）

Ambient Storage Temperature－25℃ to 65℃（No Freeze, No Condensation）

Ambient Storage Humidity

80%RH max. （No Condensation）

https://www.sunmulon.co.jp/english/products/switch_e/fh.html◇Dimensions：page FH-4
◇Internal connection arrangements：page FH-9
◇Mounting design / Panel cutout：page FH-12～14◇Accessories：page FH-5
◇Ordering code：page FH-6～7◇LED specifications：page FH-10◇Terminals：page FH-11◇Accessories’ dimensions / Panel cutout：FH-15～16

Sunmulon Co., Ltd.

FH-1

CONTACT RATINGS

SPECIFICATIONS
Illumination
type
Contact
Terminal

SquareRectangle

Full-Face
Spot
Non-illumination
SPDT

A
A
A
A

A
A
A
A

DPDT
Soldering

A
A

A
A

RoHS（10 Substances)
A : Applicable

Conform to standards

N/A : Not applicable● Silver contact (Gold-plated)
Voltage

Current (A)(Resistive load)

AC 125 V
250 V

5
5

DC

2

8V
14 V
30 V
125 V

2
1
0.3

● Cross-bar contact
AC 125 V 0.1 A (Resistive load)Rating

DC 30 V 0.1 A (Resistive load)
Minimum applicable load DC 5 V 1 mA (Resistive load)

STRUCTURE
Full-FaceSpot

BUTTON

BUTTONLENSDIVIDERFILTER

HOUSING

Sunmulon Co., Ltd.

FH-2

ILLUMINATION TYPES
Common for each button size.
LED color symbol

70

80

Red

90

Green

Yellow※ Yellow (90) is actually “ORANGE Yellow” not Lemon Yellow.

Full-Face

Spot

70

80

90

Spot LED Color

70

Red

Sunmulon Co., Ltd.

80

Green

90

Yellow

FH-3

DIMENSIONS● Full-Face
Square

□15.3

25.5
19.8

1.8 2.5□11.4

Sunmulon mark

3D

TOP VIEW

□13.5

DXF

20.3

15.3

16.4

11.4

25.5
19.8

1.8 2.5

Rectangle

MULON markTOP VIEW

3D

18.5

DXF

13.5

● Spot□15.3

Square1.8 2.5

□11.4

25.5
19.8

3

1.6

4

Sunmulon mark

3D

TOP VIEW

□13.5

DXF

20.3

15.3

16.4

11.4
6

25.5
19.8

3

1.6

1.8 2.5

Rectangle

MULON mark

3D
DXF

TOP VIEW
18.5

13.5

3D・DXF data download site ： https://www.sunmulon.co.jp/download/
Tolerance : ± 0.4 mm

Sunmulon Co., Ltd.

FH-4

ACCESSORIES
Name

Appearance

BarrierClassification
Short center barrier

Short side barrierLong center barrierLong side barrier

DXF

Guard cover

For square button
3D

DXF
DXF

Dust proof cover

For rectangle button

Part no.
Black

FH-592-K

Gray

FH-592-G

Black

FH-593-K

Gray

FH-593-G

Black

FH-594-K

Gray

FH-594-G

Black

FH-595-K

Gray

FH-595-G

Black

FH-596-K

Gray

FH-596-G

Black

FH-597-K

Gray

FH-597-G

For square button

Precautions for use- Cannot be used with guard cover anddust proof cover.

- Cannot be used with guard cover anddust proof cover.

- The cover to be opened 90°and stopped.
Do not apply any more excessive force.

FH-598- Cannot be used with barriers andguard cover.

DXF
DXF

For rectangle button

FH-599SocketSoldering terminal

Black

FH-0735- Use built-in resistor type for the switch
housing.

PCB terminal

Black

FH-0736

DXF
DXF

Removing tool
For removal button

SJ-0001- Be used to remove button from housing.

3D・DXF data download site ： https://www.sunmulon.co.jp/download/

Sunmulon Co., Ltd.

FH-5

ORDERING CODE 【Full-Face】
Assembled Part● OPERATION
L

Indicator

M

Momentary

A

Alternate(Light cartridge and Housing)FH● MOUNTING ※2)※3)

1

For Vertical Mtg.

2

For Horizontal Mtg.

X

Without Snap spring● TERMINAL● CONTACTS

SolderingX

No terminals

0

Indicator

1

SPDT・Silver (Gold-Plated)

2

DPDT・Silver (Gold-Plated)

3

SPDT・Crossbar

1

Red

4

DPDT・Crossbar

2

Green

3

Yellow※3)● FILTER COLOR● BUTTON SHAPE※1)

4

Milk-whiteS

SquareX

Without filter

W

Rectangle

Generally, in case of using color button,
filter is not necessary.

● Supply Voltage to LED● HOUSING COLOR

4

DC12V or more Non-resistor

B

Black

5

DC 5V Non-resistor

G

Gray

6

DC 5V Built-in resistor

7

DC12V Built-in resistor

8

DC24V Built-in resistor

X

Without LED

For Non-resistor type,use external protective resistor.

● BUTTON COLOR● LED COLOR

R

Red

70

Red

G

Green

80

Green

Y

Yellow

90

Yellow

M

Milk-white

C

Clear

X

Without button

X※1)

Without LED ※3)※1)● NOTES※1) The color of “Yellow” for LED (90) , button (Y) and filter (3) is actually “Orange Yellow” not Lemon Yellow.

※2）Snap spring metal plates come out Left / Right direction for Vertical mounting, and Top / Bottom direction for Hoizontal mounting
to avoid interfering mutually. Therefore, in case of independent use, it does not matter. (select 2 Horizontal ordinary)※3) In case of Indicator (L) without LED (X), specify No terminals (X).

◇Dimensions：page FH-4
◇Internal connection arrangements：page FH-9
◇Mounting design / Panel cutout：page FH-12～14◇Accessories：page FH-5
◇LED specifications：page FH-10◇Terminals：page FH-11◇Accessories’ dimensions / Panel cutout：FH-15～16

Sunmulon Co., Ltd.

FH-6

ORDERING CODE 【Spot】
Assembled Part● OPERATION
L

Indicator

M

Momentary

A

Alternate(Light cartridge and Housing)

FHS● MOUNTING ※2)※3)

1

For Vertical Mtg.

2

For Horizontal Mtg.

X

Without Snap spring● TERMINAL● CONTACTS

Soldering0

Indicator

1

SPDT・Silver (Gold-Plated)

2

DPDT・Silver (Gold-Plated)

3

SPDT・Crossbar

1

Red

4

DPDT・Crossbar

2

Green

● LENS COLOR● BUTTON SHAPEP

SquareL

Rectangle

DC12V or more Non-resistor

5

DC 5V Non-resistor

6

DC 5V Built-in resistor

7

DC12V Built-in resistor

8

DC24V Built-in resistor

X

Without LED

For Non-resistor type,use external protective resistor.

3

Yellow

4

Milk-white

X

Without Lens

※1)

● HOUSING COLOR● Supply Voltage to LED
4※3)● BUTTON COLOR● LED COLOR

R

Red

G

Green

70

Red

Y

Yellow

80

Green

M

Milk-white

90

Yellow

B

Blue

K

Black

X

Without button

X

Without LED

※1)
※3)

B

Black

G

Gray

※1)

● NOTES※1) The color of “Yellow” for LED (90) , button (Y) and filter (3) is actually “Orange Yellow” not Lemon Yellow.

※2）Snap spring metal plates come out Left / Right direction for Vertical mounting, and Top / Bottom direction for Hoizontal mounting
to avoid interfering mutually. Therefore, in case of independent use, it does not matter. (select 2 Horizontal ordinary)※3) In case of Indicator (L) without LED (X), there is no terminal but specify soldering terminal (S).

◇Dimensions：page FH-4
◇Internal connection arrangements：page FH-9
◇Mounting design / Panel cutout：page FH-12～14◇Accessories：page FH-5
◇LED specifications：page FH-10◇Terminals：page FH-11◇Accessories’ dimensions / Panel cutout：FH-15～16

Sunmulon Co., Ltd.

FH-7

REPLACEMENT PARTS● Full-Face BUTTON／FILTER

FH● BUTTON SHAPE
573

Square574

Rectangle● FILTER COLOR
1
L2
3
4
0

● BUTTON COLOR
R
LG
Y

Red
Green
Yellow

M
C
K

Milk-white
Clear
Black

X

Without button

※1)

Red
Green
Yellow※1)

Milk-white
Without filter

※2)

※2)

※1）The color of “Yellow” for button (Y) and filter (3) is actually “Orange Yellow” not Lemon Yellow.
※2）If only a button is required, specify without filter (0). If only a filter is required, specify without button (X).
※Black button do not transmit light.

● Spot BUTTON／FILTER

FH● BUTTON SHAPE
575
576● LENS COLOR

Square12340● BUTTON COLOR

Rectangle

R
G
Y

Red
Green
Yellow

M
B
K

Milk-white
Blue
Black

X

Without button

※1)

Red
Green
Yellow※1)

Milk-white
Without Lens

※2)

※2)

※1）The color of “Yellow” for button (Y) and filter (3) is actually “Orange Yellow” not Lemon Yellow.
※2）If only a button is required, specify without Lens (0). If only a Lens is required, specify without button (X).
※Black button do not transmit light.

● DIVIDERFILTER DIMENSIONS
14.55

LEGEND
FACE
BLAST FACE

9.55
LEGENDFACE

1.2

FH-536□9.55

FH-535

Rectangle

1.2

SquareBLAST FACE

FH-573

FH-574Tolerance : ± 0.4 mm

Sunmulon Co., Ltd.

FH-8

INTERNAL CONNECTION ARRANGEMENTS● Full-Face / Spot
BOTTOM VIEWTOP VIEW

－

DC 5V

＋

Sunmulon mark

DC12V
DC24V

－
＋

Sunmulon markSunmulon Co., Ltd.

FH-9

LED SPECIFICATIONS 【Full-Face】● BUILT-IN RESISTOR
Voltage
DC 5V

±5％

DC12V

±5％

DC24V

±5％

● Wiring Diagram

Rated Current (mA)
Red
Green Yellow
15

25

15

8

13

8

8

13

8

R
IF

VDD

VF

● NON-RESISTOR (EXTERNAL RESISTOR)
Supply Voltage
DC5V
DC12V・24V
Red Green Yellow Red Green Yellow
LED Color
40
40
20
20
20
Max. Forward Current IFM (mA) 40
10
10
20
20
20
DC Reverse Voltage VR(V) 10Forward Voltage
4.2
4
8
8.4
8
VF（Typ.） (V) 4
Derating (Operating temperature)
0.36(over 25℃ working temperature)（mA/℃）

Pulse Width PW
Pulse
Duty Ratio DR
Lighting
IFM

(μs)

100
10－1
100

(mA)

R
IF

(DC5V)VDD

VF(DC12・24V)

Refer to the following formula
to calculate external resistance values.

R＝

VDD－ VFIFVDD：Supply Voltage
VF ：Forward Voltage
IF ：Forward Current
IF (Forward Current) : Refer to the Rated Current of BUILT-IN RESISTOR type,and be sure to set less than IFM (Max. Forward Current).

LED SPECIFICATIONS 【Spot】● BUILT-IN RESISTOR
Voltage
DC 5V

±5％

DC12V

±5％

DC24V

±5％

● Wiring Diagram
R

Rated Current (mA)
Red
Green Yellow
15

25

15

8

13

8

8

13

8

IF

VDD

● NON-RESISTOR (EXTERNAL RESISTOR)
Supply Voltage
DC5V
DC12V・24V
Red Green Yellow Red Green Yellow
LED Color
40
40
20
20
20
Max. Forward Current IFM (mA) 40
10
10
20
20
20
DC Reverse Voltage VR(V) 10Forward Voltage
4.2
4
8
8.4
8
VF（Typ.） (V) 4
Derating (Operating temperature)
0.36(over 25℃ working temperature)（mA/℃）

Pulse Width PW
Pulse
Duty Ratio DR
Lighting
IFM

(μs)

(mA)

100
10－1
100

R
IF

VF

(DC5V)VDD

VF(DC12・24V)

Refer to the following formula
to calculate external resistance values.

R＝

VDD－ VFIFVDD：Supply Voltage
VF ：Forward Voltage
IF ：Forward Current
IF (Forward Current) : Refer to the Rated Current of BUILT-IN RESISTOR type,and be sure to set less than IFM (Max. Forward Current).

For resistance value calculation
https://www.sunmulon.co.jp/english/products/led.html
The resistance value can be calculated just by entering the items.

Sunmulon Co., Ltd.

FH-10

TERMINALS■ Full-Face・Spot・Non-illumination● TERMINALS LAYOUT（BOTTOM VIEW）
SPDT
Sunmulon mark

＋ NC
－

DPDT

INDICATOR

Sunmulon markSunmulon mark

NC

NO

NO －

C

＋

＋ NC
NO

－

C C

※ When “Without LED (X)” is specified, there is no LED terminal.（＋, －）● TERMINALS DIMENSION（BOTTOM VIEW）

NC

Sunmulon mark

＋ NC

NO －

NO

5.08

5.08 5.08

2.54

C C

7.62
※ When “Without LED (X)” is specified, there is no LED terminal.（＋, －）

6

1.6

4

TERMINAL SHAPE

0.8

0.5

2.05

Soldering Terminal

Tolerance : ± 0.4 mm

Sunmulon Co., Ltd.

FH-11

MOUNTING DESIGN／PANEL CUTOUT● SquareMounting design

15.3

Individual(Horizontal)

Panel cutout
Recommended panel thickness : 1 to 3.2 mm※2）13.8 ＋0.15－0.1

Multiple(Horizontal)
15.3

Without Barriers

15.3

13.8＋15.3（n－1）＋0.15
－0.1

15.3n

※1）

15.3

Multiple(Vertical)

15.3n

Recommended panel thickness : 1 to 3.2 mm
16.5

Individual(Horizontal)

n : Number of Units※2）

13.8 ＋0.15－0.1

Multiple(Horizontal)
16.5

With Barriers

20

18＋16.5（n－1）＋0.15－0.1

20＋16.5
（n－1）

※1）

16.5

Multiple(Vertical)

20＋16.5（n－1）

n : Number of Units

Individual(Horizontal)

13.8 ＋0.15
－0.1

18

Multiple(Horizontal)

13.8＋18（n－1）＋0.15
－0.1

18

With Guard cover18

Recommended panel thickness : 1 to 3.2 mm

18n

n : Number of Units※ If the panel is to be finished (e.g. coated), make sure that the panel meets the specified dimensions after the coating.
In case the panel cut dimension is too small, it may cause malfunction.
※ 1）For vertical mounting, specify the ordering code 1 (For Vertical Mtg.) .
※ 2）For horizontal mounting, specify the ordering code 2 (For Horizontal Mtg.).
※ After the panel-cutting process, make sure to remove burrs on the surface.

Tolerance : ± 0.4 mm

Sunmulon Co., Ltd.

FH-12

MOUNTING DESIGN／PANEL CUTOUT● Rectangle
Mounting design

Panel cutout

Individual(Horizontal)
15.3

Recommended panel thickness : 1 to 3.2 mm

13.8 ＋0.15
－0.1

20.3

Multiple(Horizontal)
15.3

＋0.15
18.8＋20.3（n－1）
－0.1

20.3n

n : Number of Units

Individual(Vertical)

Recommended panel thickness : 1 to 3.2 mm

18.8 ＋0.15
－0.1

20.3

Without Barriers

※2）

15.3

Multiple(Vertical)

13.8＋15.3（n－1）＋0.15
－0.1
20.3

※1）

15.3n

n : Number of Units

Individual(Horizontal)
16.5

Recommended panel thickness : 1 to 3.2 mm

13.8 ＋0.15
－0.1

25

Multiple(Horizontal)

23＋21.5（n－1）＋0.15－0.1

25＋21.5（n－1）

n : Number of Units
Recommended panel thickness : 1 to 3.2 mm

Individual(Vertical)
21.5

With Barriers

16.5

※2）

18.8 ＋0.15
－0.1

20

Multiple(Vertical)

18＋16.5（n－1）＋0.15
－0.1

21.5

※1）

20＋16.5（n－1）

n : Number of Units※ If the panel is to be finished (e.g. coated), make sure that the panel meets the specified dimensions after the coating.
In case the panel cut dimension is too small, it may cause malfunction.
※ 1）For vertical mounting, specify the ordering code 1 (For Vertical Mtg.) .
※ 2）For horizontal mounting, specify the ordering code 2 (For Horizontal Mtg.).
※ After the panel-cutting process, make sure to remove burrs on the surface.

Tolerance : ± 0.4 mm

Sunmulon Co., Ltd.

FH-13

MOUNTING DESIGN／PANEL CUTOUT● Rectangle
Mounting design

Panel cutout

18

Recommended panel thickness : 1 to 3.2 mm

13.8 ＋0.15
－0.1

23

Multiple(Horizontal)

18.8＋23（n－1）＋0.15
－0.1

18

With Guard cover

Individual(Horizontal)

n : Number of Units

23n※ If the panel is to be finished (e.g. coated), make sure that the panel meets the specified dimensions after the coating.
In case the panel cut dimension is too small, it may cause malfunction.
※ After the panel-cutting process, make sure to remove burrs on the surface.

● Panel cut spacing dimensions for spaced individual mounting
Without Barriers

shown in brackets.

1.0

more than 3 mm

more than 5.5 mm

For vertical individual, the dimensions are

more than 5.5 mm（more than 3 mm）

The figures are all for horizontal individual.

With Barriers
more than 3 mm
（more than 5.5 mm）

Tolerance : ± 0.4 mm

Sunmulon Co., Ltd.

FH-14

ACCESSORIES
3.4

3.4

BARRIER

16.5

FH-593-K

Center barrier
FH-592-K

Gray

FH-593-G

FH-592-G

20.8

Side barrier

Black

20.8

Color

4.8

● SHORT BARRIER

4.8

16.5

※ Cannot be used with guard cover and dust proof cover.

DXF

13.5

DXF

13.5

Side barrier

Center barrier
3.4

3.4

● LONG BARRIER

21.5

21.5

Center barrier

FH-595-G

FH-594-G

20.8

FH-594-K

Gray

4.8

FH-595-K

20.8

Side barrier

Black

4.8

Color

※ Cannot be used with guard cover and dust proof cover.
18.5

DXF

18.5

DXF

Side barrier

Center barrier

GUARD COVER
FH-596-K

Gray

FH-596-G

Black

FH-597-K

Gray

FH-597-G※ The cover to be opened 90°and stopped.
Do not apply any more excessive force.

6.8

Rectangle

Black

6.8

Square

5

18

5
8.7

3D
DXF

9.2
18

※ Cannot be used with barriers and guard cover.

DXF

21

13.8 ＋0.15－0.1

FH-59918

Panel cutout
6.6

Rectangle

9.2

Rectangle

Dust-Proof CoverFH-5985
8.7

DXF

SquareSquare523

13.8 ＋0.15
－0.1

21

Recommended panel thickness : 1 to 2.5 mm

DXF

26

21

13.8 ＋0.15
－0.1

6.6

Panel cutout

18.8 ＋0.15－0.1

Recommended panel thickness : 1 to 2.5 mm

3D・DXF data download site ： https://www.sunmulon.co.jp/download/

Sunmulon Co., Ltd.

Tolerance : ± 0.4 mm

FH-15

ACCESSORIESSOCKET● Full-Face / Spot
Socket terminal shape

Type to be used

Soldering terminal

Part no.

Resistance value

Remarks

FH-07350Ω

Housing should be a built-in resistor type.

FH-07360Ω

Housing should be a built-in resistor type.

Built-in resistor type
PCB terminal● Soldering Termial（Square, Rectangle）
Sunmulon mark (Switch)

NC

-

5.7

COM

DXF

2.05

+

NO

13.5

7.62

2.54

COM

15.8

12.2

5.08

NC
NO

5.08 5.08
14.8

0.5

（BOTTOM VIEW)● PCB Termial（Square, Rectangle）
Sunmulon mark (Switch)

NC

-

4

COM

DXF

NC
NO

5.08 5.08

0.5

1
2.05

+

NO

13.5

7.62

2.54

COM

15.8

12.2

5.08

14.8
（BOTTOM VIEW)

Socket mounting dimensions

32

32

0.5

1
2.05

PCB Terminal

4

Soldering Terminal

0.5

5.7

0.8
2.05

5

6.7

1.6

4.7

● Terminal shape

Soldering Terminal

PCB Terminal

Tolerance : ± 0.4 mm

Sunmulon Co., Ltd.

FH-16

ASSEMBLY & DISASSEMBLY
Divider

1. Fitting Button, Lens, Filter
Blasting surface
FilterShiny flat face

Lens

ButtonTapered part

ButtonRemoving Button

For Full-Face

For Spot

Be sure to remove with the removing tool (SJ-0001).
Hang the button with the removing tool in the groove,and pull it straight out.

Insert the shiny flat face side of
the filter into the button.

Insert the Lens into the button holewith the tapered part facing the divider.

※ In case removing in any other way than the above,it may cause damage.

2. Installig Barriers

Installing Barriers (Multiple)

After setting the side barriers on the Housing, and insert it
into the panel cut-out.

Insert the cener barrier between the switches after mounting
the switches with the side barriers into the panel cut-out.

PRECAUTIONS FOR CORRECT USE
1. Solder quickly and correctly at 380℃ max. and 3 seconds or less. Be careful not to touch the soldering iron to the main body.

Rectangle
014.55 －0.2

09.55 －0.2

2. Wait for one minute during and after soldering before exerting any external force on the solder.
3. Supply voltage to LED is indicated on the side of the Housing.
4. Character films are not included.
SquareIf preparing the character film separately, use a heat-resistant film with a thickness
0□9.55－0.2
of 0.1 mm. For the dimensions, please. refer to the figure on the right.

※ For handling instructions and precautions other than the above, please refer to “Safety Precautions for All illuminatedPushbutton Switches”.

Tolerance：± 0.4 mm
As of September 2024

FH-17

Safety Precautions for All Illuminted Pushbutton Switches
1. Notes on contents of Catalogs(1) Rated values, performance values, and specification values of Sumulon products listed in this catalog are values acquired under respective conditionsin independent testing, and do not guarantee values gained in combined conditions.
(2) The ambient operating temperature(humidity) is guaranteed by evaluation based on characteristics, and does not guarantee continuous use for a long
period of time near the upper or lower limit of the ambient operating temperature(humidity) or permanent use at that temperature(humidity).
(3) Reference data and reference values listed in catalogs are for reference purposes only, and do not guarantee that the product will always operate
appropriately in that range.
(4) The specifications / appearance and accessories of Sunmulon products listed in catalogs are subject to change or termination of sales without notice,for improvemnet or other reasons.
(5) The content of catalogs is subject to change without notice.

2. Note on applications(1) If using Sunmulon products in combination with other products, confirm the following suitability by yourself. Sunmulon shall provide no guarantees
regarding the combination suitability.
(a) Regulations, satndards, or laws to which your machinery, equipment, ect. must conform(b) Functionality and safety of your machinery and equipment(2) Wiring and installation that ensures the Sunmulon product used in your system, machine, device, or the like can perform and function according to
its specifications.
(3) When using Sunmulon products, be cautious when implementing the following.
(a) Use of Sunmulon products with sufficient allowance for rating and performance.
(b) Safety design, including redundant design and malfunction prevention design that prevents other danger and damage even in the event that
Sumulon product fails.
(4) Sunmulon products are designed and manufactured as general-purpose products for general industrial products. They are not intended for use
in the following applications, and in the event that you use Sunmulon product for these applications, unless otherwise agreed upon between you
and Sunmulon, Sunmulon shall provide no guarantees whatsoever regarding Sunmulon products.
(a) Safety devices intended for human body protection(b) Direct control of transport equipmnt (railroads / airplanes / ships / vehicles / vehicle instruments, etc.)(c) Space equipment, submarine equipment(d) Nuclear power control equipment, radiation related equipment(e) Combustion equipment, electric heat equipment(f) Disaster prevention and security equipment(g) Elevating equipment(h) Amusement facilities(i) Facilities subject to government or industry regulations(j) Use in applications that require a high degree of safety, any other equipment, instruments, or the like that could endanger life or human health

3. Warranty(1) The warranty period for Sunmulon products shall be 1 year after purchase or delivery to the specified location.
(2) Warranty scope should a failure occur in Sunmulon product during the above warranty period for reasons attributable to Sunmulon, then Sunmulon shallprovide that product, free of charge, the same quantity. Further, in no event shall liability of Sunmulon exceed the individual price of the product onwhich liability is asserted.
(3) Failures cause by the following reasons shall be deemed outside the scope of this warranty.
(a) The product was handled or used deviating from conditions / environment listed in the catalogs(b) The failure was caused by reasons other than Sunmulon product(c) Modification or repair was performed by a party other than Sunmulon(d) Replacement of maintenance parts, installation of accessories, or the like was not performed properly in accordance with the user’s manual andcatalogs(e) The failure could not have been predicted with the scientific and technical standards at the time when the product was shipped from Sunmulon(f) The failure was due to other causes not attributable to Sunmulon (including cases of force majeure such as natural disasters and other disasters)(4) The warranty listed in this Safety Precautions is the full and complete warranty for Sunmulon products, and Sunmulon shall bear no liability whatsoever
regarding special damages, indirect damages, incidental damages, or passive damages that occurred due to Sunmulon product.

4. Handling precautions for switch(1) Do not perform wiring with power supplied to the switch. Do not touch the terminals or other charged parts of the switch while power is being supplied.
Doing so may result in electric shock.
(2) Be careful of electrostatic breakdown when handling.
(3) Do not drop or otherwise apply strong force to the switch.
(4) Do not place heavy objects on the switch.
(5) Do not operate or use the housing (switch unit) by itself. Use the switch with assembled the illuminated part (LED module or button).
(6) Pushbutton switches are designed to be operated by fingertips. Operating the switch using a sharp object (screwdrivers, tweezers, etc.), hard object(metal, etc.), or with a large or sudden force, may cause deform or damage the switch.
(7) Do not use the switch under loads that exceed the rated switching capacity or other contact ratings. Doing so may result in welding of the contact,or burnout accidents.

Sunmulon Co., Ltd.

PRECAUTION-1

Safety Precautions for All Illuminted Pushbutton Switches(8) For inductive load, the arc by back EMF may cause contact failure. Insertion of arc prevention circuit as the following is recommended.
Circuit

Element selection

Diode

L

C

R

Circuit

Element selection

The diode must withstand a peakinverse voltage 4 times higher thanthe power supply voltage and regarding
a forward current must as high or higher
than the load current.

L

C：1 to 0.5 μF × switch current (A)R：0.5 to 1 Ω × switch voltage (V)DCDC

The values may change according to
the characteristics of the load.
Determine ideal capacitance andresistance values through testing.
R

ZNR
Varistor

L

C
AC, DCL

Use a varistor that can withstandthe power supply voltage sufficiently.
(1.5 times or more)

AC, DC(9) Following circuits show examples of an anti-chattering circuit.
VDD

VDD

R

R1

VOUT
SW

R2
VOUT

C

SW

R
VDD

(10) Illumination(a) Do not apply a voltage between the LED terminal that is greater than the rated voltage. Doing so may damage the LED, cause lighting failure.
(b) LEDs cannot be lit directly by AC circuit should be provided rectifier smoothing circuit for products other than AC input type.

Correct

Incorrect
R
DC

AC

R
LED

LED

AC

(c) When wiring, pay attention to the polarity of the terminals.
(d) Simultaneous lighting may not be possible with Dual-Color illumination or Split-Face illumination (2, 3, or 4 split illumination), check the catalog.
(e) Apply voltage directly to LEDs of Non-built-in resistor type will damage the LEDs, so connect an appropriate external resistor.

(11) Wiring(a) Do not apply a soldering iron to the switch housing. Doing so may deform the terminals and cause defects.
(b) See catalog for models compatible with flux prevention measures terminal. Be careful not to allow flux to panetrate sliding parts such as buttons.
Use non-corrosive rosin solution as flux for dip soldering.
(c) For soldering other than flux-preventive models, hand solder with the terminals facing down to prevent flux from penetrating into the switch.

Correct

Incorrect(d) The housing of KA, K2, and K9 series are designed for reflow soldering.
(e) Use the appropriate wire size for the applied voltage and current, and solder properly. Use of the product with incomplete soldering may cause
abnormal heat generation, resulting in a fire hazard.
(f) After wiring is completed, maintain an appropriate insulation distance.

Sunmulon Co., Ltd.

PRECAUTION-2

Safety Precautions for All Illuminted Pushbutton Switches(12) Usage environment(a) Do not use in the presence of flammable or explosive gases such as gasoline, thinner, LPG, etc.
(b) Avoid using the product in places where corrosive or silicon gas is generated, high temperature, high humidity, sea breeze or direct sunlight.
(c) Provide appropriate protection when using the product in places where it is exposed to water, oil, metal powder, or dust.
(d) Do not use the product in a place subject to vibration or shock. It may cause malfunction or damage.
(e) When installed in a close grouping or continuously lit, the ambient temperature may exceed the specified value due to heat generation.
Take measures such as ventilation and lowering the operating voltage.
(f) When checking the actual equipment, load conditions and operating environment should be the same as the actual operating conditions.
(g) The ambient temperature for storage is －25℃ to 65 ℃ (No freeze, no condensation).

(13) When wiping off dirt on the exterior of the switch and accessories such as side plates, wipe lightly with a soft, dry cloth. Organic solvents such as
thinner, benzene, alcohol, or other acidic chemicals may cause deformation, discoloration, or malfunction.
(14) Store the product away from malignant gases, dust, high temperature and high humidity, and keep it in our packing condition.
(15) When removing the illuminated part (or button) from the alternate switch housing, switch state should be in a free state.

Correct

Incorrect

Removal in a locked state may cause malfunction or damage
to alternate switch.

Illuminated part
(Button)Free state

Locked state(16) Periodic inspection and replacement(a) Although mechanical and electrical durability are listed in the specifications column, deterioration of various parts (deterioration of resins andcorrosion of metal parts) is possible due to the operating environment and method of use. We ask that you implement inspections for Sunmulon
products to prevent accidents from occurring by conducting periodic inspections and replacements.
(b) When the switch is left unused or stored for long periods, contact reliability may deteriorate due to oxidation of contacts, which may cause continuity
failure, etc. Therefore, it is necessary to check the operation before use.

(17) Service scope
The price of Sunmulon products do not include the cost of services, such as dispatching technicians.

Sunmulon Co., Ltd.

PRECAUTION-3