MHMH Illuminated Pushbutton Switch
16 mm mounting hole,
Snap-in, screw mounting.
■ Depth behind panel：Only 22 mm■ LED Full-Face available.

■ Terminal：#110 Tab・Soldering■ Accessories：Guard cover, Dust-Proof coverNC
Switchconnection

C
NO

CHARACTERISTICS
Square：□14.2 mm

Button Size
Contact Material

Rectangle：14.2×20.2 mm

Round：φ15 mm

Silver contact (Gold-plated)
AC 125 V 3 A
AC 250 V 3 A

Rating (Resistive Load)
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

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

Vibration Resistance

10 to 55 Hz, Amplitude 1.5 mm

MechanicalLife

MomentaryMore than 2,000,000 operations

AlternateElectrical Life (Resistive Load)

More than 200,000 operations
More than 70,000 operations at max. rated load

Operating Force

4.41 Nmax.

Total Travel

2.5 mmmax.

WeightAmbient Operating Temperature
Ambient Operating Humidity

Square：7g

Rectangle：7.5g

Round：6.5g－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/mh.html◇Dimensions：page MH-3～4◇Internal connection arrangements：page MH-8
◇Mounting design / Panel cutout：page MH-11◇Accessories：page MH-5
◇LED specifications：page MH-8

Sunmulon Co., Ltd.

◇Ordering code：page MH-6
◇Terminals：page MH-10

MH-1

CONTACT RATINGS

SPECIFICATIONS

Illumination
type
Contact
Terminal

SquareRectangle

Round

Full-FaceA

A

A

Non-illumination

A

A

A

SPDT

A

A

A

DPDT

A

A

A

#110 Tab
SolderingAAA

RoHS（10 Substances)
A : Applicable● Silver contact (Gold-plated)
Voltage

Current (A)(Resistive load)

AC 125 V
250 V

3
3

DC

2

Conform to standards

N/A : Not applicable

8V
14 V
30 V
125 V

2
1
0.3

STRUCTURE

BUTTONFILTER

HOUSINGILLUMINATION TYPES
Common for each button size.
LED color symbol

70

Red

80

Green

90

Yellow

71

Red

81

Green

91

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

70

80

90

71

81

91

Full-Face

Sunmulon Co., Ltd.

MH-2

DIMENSIONS● Snap-in mounting type□18

SquareSunmulon mark

29.5
22

5 3

□14.2

TOP VIEW

φ15.3

3D
DXF

24

18

20.2

14.2
Sunmulon mark

29.5
22

5 3

Rectangle

TOP VIEW

φ15.3

3D
DXF

Round

φ18

φ15

29.5
22

5 3

Sunmulon mark

3D

φ15.3

TOP VIEW

DXF

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

Tolerance : ± 0.4 mm

Sunmulon Co., Ltd.

MH-3

DIMENSIONS● Screw mounting typeSquare

□18

□14.2

29.5
22

5 3

Sunmulon mark

M16×1
TOP VIEW

φ14.8

3D
DXF

24

18

20.2

14.2

Sunmulon mark

29.5
22

5 3

Rectangle

M16×1
TOP VIEW

φ14.8

3D
DXF

Round

φ18

φ15

29.5
22

5 3

Sunmulon mark

M16×1

3D
DXF

0.5

2.8

TOP VIEW

φ14.8

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

Tolerance : ± 0.4 mm

Sunmulon Co., Ltd.

MH-4

ACCESSORIES
Name

Appearance

Classification

Guard cover
For square, round button

3D
DXF

For rectangle button

Part no.

Precautions for use

Black

MH-0931-B

Gray

MH-0931-G- For screw mounting type.
Cannot be used for snap-in mounting type.

Black

MH-0930-B- The cover to be opened 90°and stopped.
Do not apply any more excessive force.

Gray

MH-0930-G

Water proof cover
For square, round button

MH-456- For screw mounting type.
Cannot be used for snap-in mounting type.

3D
DXF

Tightening tool

For rectangle button

MH-494

For tightening housing
screw

MH-448- Be used to tightening housing screw.

For removal button

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

Removing tool

3D・DXF data download site ： https://www.sunmulon.co.jp/download/◇Accessories’ dimensions / Panel cutout：MH-11

Sunmulon Co., Ltd.

MH-5

ORDERING CODE 【Full-Face】
Illumination

S

MH

Assembled Part● OPERATION● MOUNTING

L

Indicator

1

Snap-inM

Momentary

2

Screw

A

Alternate● TERMINAL● CONTACTBlank

S ＃110 Tab・Soldering

Indicator

1

SPDT・Silver (Gold-Plated)

2

DPDT・Silver (Gold-Plated)● FILTER COLOR● HOUSING COLOR● BUTTON SHAPESSquareW

Rectangle

R

Round

Parallel

Series

70

Red

71

Red

80

Green

81

Green

90

Yellow

91

Yellow※1)※1)

Specify parallel for using DC 9V or less.
For protecting LED, use external protective resisor.

Red

2

Green

B

Black

3

YellowG

Gray

4

Milk-white

Blank

Without filter● BUTTON COLOR● LED COLOR

1

R

Red

G

Green

Y

Yellow

M

Milk-white

C

Clear

X

Without button※1)

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

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

Non-illumination
Assembled Part● OPERATIONSMH● MOUNTING

L

Indicator

1

Snap-inM

Momentary

2

Screw

A

Alternate● TERMINAL● CONTACT
Blank

Indicator

1

SPDT・Silver (Gold-Plated)

2

DPDT・Silver (Gold-Plated)● BUTTON SHAPESSquareW

Rectangle

R

Round

● ILLUMINATED TERMINAL
Blank
0

S ＃110 Tab・Soldering

Without terminals
WIth dummy terminals● NOTES● FILTER COLOR● HOUSING COLOR

1

Red

2

Green

B

Black

3

YellowG

Gray

4

Milk-white

Blank

Without filter● BUTTON COLOR
R

Red

G

Green

Y

Yellow

M

Milk-white

C

Clear

X

Without button※1)

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

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

◇Dimensions：page MH-3～4◇Internal connection arrangements：page MH-8
◇Mounting design / Panel cutout：page MH-11◇Accessories：page MH-5
◇LED specifications：page MH-8

Sunmulon Co., Ltd.

◇Terminals：page MH-10

MH-6

REPLACEMENT PARTS● Full-Face・Non-illumination BUTTON／FILTER

BUTTONFILTERRed

Green

Yellow

Milk-white

Clear

SquareMH-400-1LR

MH-400-1LG

MH-400-1LY

MH-400-1LM

MH-400-2C

Rectangle

MH-485-1LR

MH-485-1LG

MH-485-1LY

MH-485-1LM

MH-485-2C

Round

MH-393-1LR

MH-393-1LG

MH-393-1LY

MH-393-1LM

MH-393-2C

SquareDH-339-LR

DH-339-LG

DH-339-LY

DH-339-M

Rectangle

MH-486-LR

MH-486-LG

MH-486-LY

MH-486-LM

Round

MH-399-LR

MH-399-LG

MH-399-LY

MH-399-LM

FILTER DIMENSIONS□12.15

φ12.95
R0.45
12.15

18.15

Housing Sunmulon markor JAPAN mark

BLAST FACE

DH-339LEGEND
FACE

BLAST FACE

MH-486

1.5

1.65

17.85

0.15

LEGEND
FACE
1.65

11.85

0.15

LEGEND
FACE

BLAST FACE

MH-399Tolerance : ± 0.4 mm

Sunmulon Co., Ltd.

MH-7

INTERNAL CONNECTION ARRANGEMENTS● Full-Face (Common for each button size)
Voltage
BOTTOM VIEWTOP VIEW
Sunmulon mark

DC 5V

－

＋

ParallelSunmulon mark

DC12V
DC24V

－

Sunmulon mark

＋

－

＋

Parallel

SeriesLED SPECIFICATIONS 【Full-Face】（Converted with 4 lamps）

Parallel
Red

Green

YellowRed

Green

Yellow

40

40

40

20

20

20

(V)

10

10

10

20

20

20

(V)

4

4.2

4

8

8.4

8

Max. Forward Current IFM (mA)
DC Reverse Voltage
Forward Voltage

VR

VF

SeriesDerating (Operating temperature)(over 25℃ working temperature) (mA/℃)● Wiring Diagram
IF

VDD

0.36

Pulse Width PW (μs)
PulseLighting Duty Ratio DR
IFM
(mA)

10－1
100

DC24V

±5％
±5％

Reference forward
corrent (mA)

IF (Forward Current) :and be sure to set less than IFM (Max. Forward Current).

SeriesRed

Green620Ω 1/4Ｗ

620Ω 1/8Ｗ

300Ω 1/8Ｗ

620Ω 1/8Ｗ

1500Ω 1/2Ｗ

2100Ω 1/2Ｗ 1300Ω 1/2Ｗ

2100Ω 1/2Ｗ

Green

Yellow100Ω 1/8Ｗ

33Ω 1/8Ｗ

100Ω 1/8Ｗ

620Ω 1/4Ｗ

330Ω 1/4Ｗ
820Ω 1/2Ｗ
25

15

15

VDD－ VF
IF

Refer to the Rated Current in the table on the left,

Parallel±5％ 1500Ω 1/2Ｗ

VF

VDD：Supply Voltage
VF ：Forward Voltage
IF ：Forward Current

Since LED protection resistors are not built-in, connect resistors in series referring to the below.

DC 5V

VDD

SeriesR＝● Reference external resistor

DC12V

R

Refer to the following formula
to calculate external resistance values.

Derating and pulse lighting are the values for one LED.

Red

VF

Parallel

100

Forward Voltage V F of LED color : Red・Green・Yellow【IF=20ｍA】

Voltage

IF

R

8

13

Yellow

8

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.

MH-8

TERMINALS● TERMINALS LAYOUT（BOTTOM VIEW）
SPDT

DPDT

Sunmulon mark－COM

Sunmulon mark＋NO

INDICATOR－

NC

Sunmulon markCOM COM

＋

NO

NO

NC

NC

－

＋

※ Non-illumination type can be selected with or without terminals（＋, －）by ordering code.

● TERMINALS DIMENSION（BOTTOM VIEW）
11.3

COM

NO

NO

NC

NC

＋

3.75

COM

3.75

－

0.5

Sunmulon mark4.5

※ Non-illumination type can be selected with or without terminals（＋, －）by ordering code.

2

5.9

7.5

TERMINAL SHAPE

2.8

1.2

0.5

#110 Tab・Soldering Termial

Tolerance : ± 0.4 mm

Sunmulon Co., Ltd.

MH-9

MOUNTING DESIGN／PANEL CUTOUT● SquareMounting design

Panel cutout
Snap-in mounting

Min. 18 Min. 18

Min. 180
φ16＋0.3

0R8.8－0.1

R1.5

18nRecommended panel thickness：0.5 to 5 mm0
φ16＋0.3

Recommended panel thickness：1 to 3.2 mm

Min. 18 Min. 18

10.4

23.8

With Guard coverMin. 18 Min. 18

Min. 180
φ16＋0.3

18m

Without Guard cover

Screw mounting

18nRecommended panel thickness：0.5 to 2.7 mm
n：Number of Units (Horizontal)

m：Number of Units (Vertical)● Rectangle
Mounting design

Panel cutout
Min. 24

Snap-in mounting

Min. 24

Min. 180
φ16＋0.3

0R8.8－0.1

R1.5

Recommended panel thickness：1 to 3.2 mm

Min. 24

10.4

23.8

With Guard coverMin. 240
φ16＋0.3

24n
Recommended panel thickness：0.5 to 2.7 mm
n：Number of Units (Horizontal)● Round
Mounting design

m：Number of Units (Vertical)

Panel cutout
Screw mounting

Snap-in mounting

Min. 18 Min. 18

Min. 180
φ16＋0.3

Min. 18 Min. 18

Min. 180
φ16＋0.3

18m

Without Guard coverMin. 2424n
Recommended panel thickness：0.5 to 5 mm

0R8.8－0.1

R1.5

18nRecommended panel thickness：0.5 to 5 mm0
φ16＋0.3

Recommended panel thickness：1 to 3.2 mm

Min. 18 Min. 18

10.4

23.8

With Guard coverMin. 24

Min. 180
φ16＋0.3

18m

Without Guard cover

Screw mounting

18nRecommended panel thickness：0.5 to 2.7 mm
n：Number of Units (Horizontal)

m：Number of Units (Vertical)※ 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.
Tolerance : ± 0.4 mm

Sunmulon Co., Ltd.

MH-10

ACCESSORIES

RectangleBlack

MH-0931-B

Gray

MH-0931-G

Black

MH-0930-B

Gray

MH-0930-G※ For screw mounting type.
Cannot be used for snap-in mounting type.

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

11.2

SquareRound

11.2

GUARD COVER

.8

3D

23

17.8

.8

3D

DXF

DXF

Square・Round

Rectangle

Water-Tight Cover
MH-456

Rectangle

MH-494※ For screw mounting type.
Cannot be used for snap-in mounting type.

Panel cutout

9.85

Square
Round

23

23.9

φ16＋0.3
0

.1

24

Min.
24.1

Min.
24.1

24

.1

3D
DXF

Square・Round

9.85

Panel cutout30

φ16＋0.3
0

Min.
30.1

Min.
30.1

.1

.1

24

3D
DXF

Rectangle

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

Sunmulon Co., Ltd.

Tolerance : ± 0.4 mm

MH-11

ASSEMBLY & DISASSEMBLY
1. Removing Button

2. Fitting Filter

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.

Place the filter blast face side up inside the button.
For the round type, align the groove on the sides of the filter
with the projection inside of the button, and place in.
Blast face

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

3. Fitting Button
Align the groove inside of the button, the projection insideof the housing, and fit the button until click.

4. Installing Water-tight cover
Put the switch through the cover frame (A), and mounton the panel. Install mounting nut from the rear of the panel.
Afterwards press cover (B) into the groove of cover frame (A)from above and install it.

Cover (B)Cover (A)Sunmulon Co., Ltd.

MH-12

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.
2. Wait for one minute during and after soldering before exerting any external force on the solder.
3. The tightening torque of the mounting nut when attaching to the panel should be 0.49 N･m or less.
4. Character films are not included.
If preparing the character film separately, use a heat-resistant film with a thickness of 0.1 mm.
For the dimensions, please refer to the figure below.
0
φ12.9 －0.2

R0.5

0

12 －0.2

0□11.8 －0.2

017.7－0.2

Sunmulon markSquareRectangle

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

Tolerance：± 0.4 mm
As of June 2023

Sunmulon Co., Ltd.

MH-13

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