VM

VM Micro Switch
Long Life, High current Switch

NC

SwitchC
connection

NO

CHARACTERISTICS
Part no.

VM-11P・VM-11PK

VM-21P・VM-21PK

VM-43P・VM-43PK

AC 125 V 15 A
AC 250 V 15 A

Rating (Resistive Load)
Insulation ResistanceAC 125 V 5 A
AC 250 V 5 A

More than 100 MΩ at DC 500 V
AC 1000 V RMS between NC and NO terminal
AC 2000 V RMS between terminals and ground ※1）
50/60 Hz for 60 sec. at normal ambient temperature and humidity

Dielectric Strength

Silver contact：Less than 15 mΩ DC 6 V 1 A
Silver contact (Gold-Plated) ：Less than 50 mΩ Milliohm meterContact Resistance
Shock Resistance※2）

Operating Speed※2）

300 m/s² max. (Malfunction) 500 m/s² max. (Destruction)

Vibration Resistance ※2）

10 to 55 Hz, Amplitude 1.5 mm
0.1mm～1m／sec

300 operations ／minOperating Frequency
Mechanical Life

More than 2 million operations

More than 10 million operations

More than 10 million operations

More than 100,000 operations

Electrical Life (Resistive Load)

6.1g ※2）

WeightAmbient Operating Temperature－15℃ to ＋70℃ (No Freeze)

Ambient Operating Humidity

80%RH Max.

(No Conensation)

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

Ambient Storage Humidity

80%RH Max.

(No Condensation)※1）The values are for the Soldering terminal. The screw terminal is AC1500V.
※2）The values are for the pin plunger models.

OPERATING CHARACTERISTICS
Pin Plunger
Part no.

Hinge Lever

VM-1□

VM-2□

VM-43

Long Hinged Lever

Simulated Hinge Lever

VM-1□DM1 VM-2□DM1 VM-43DM1 VM-1□DL1 VM-2□DL1 VM-43DL1 VM-1□DM3 VM-2□DM3 VM-43DM3

Operating force

max.

3.92N

1.96N

0.49N

3.92N

1.96N

0.49N

1.18N

0.59N

0.15N

2.16N

1.18N

0.29N

Releace force

min.

0.98N

0.49N

0.10N

0.98N

0.49N

0.10N

0.20N

0.10N

0.02N

0.29N

0.15N

0.03N

Pretravelmax. 1.5mm

1.5mm

1.5mm

1.8mm

1.8mm

1.8mm

7.4mm

7.4mm

7.4mm

3.6mm

3.6mm

3.6mm

Overtravel

min.

0.3mm

0.3mm

0.3mm

0.3mm

0.3mm

0.3mm

1.2mm

1.2mm

1.2mm

0.6mm

0.6mm

0.6mm

Movement Differential max. 0.4mm

0.4mm

0.4mm

0.5mm

0.5mm

0.5mm

2.2mm

2.2mm

2.2mm

1.2mm

1.2mm

1.2mm

◇Dimensions：page VM-2

◇Order code：page VM-3

Sunmulon Co., Ltd.

VM-1

DIMENSIONS● Pin Plunger
MAX39
10.3
φ3.1HOLE

4.2

0.5

3.1 ＋0.25－0.05

φ3.4±0.15

15.9
MAX19

NC
NO

MAX23

2.8
10.3±0.1

OP14.6±0.5

PT

27.8
20.2±0.3C
22.2±0.1● Hinge Lever
t0.6 STAINLESS PLATE
MAX39

10.3

15.9

MAX21

15.9

0.5

MAX21

φ3.4±0.15

15.9

4.1

MAX21

φ3.1HOLE
NC

3.1 ＋0.25－0.05

10.3±0.1

OP15.2±1.5

PT

27.8
35.6±1.5
8.4

NOC
22.2±0.1● Long Hinged Lever
t0.6 STAINLESS PLATE
MAX39
PT

27.8
59.5±1.5

φ3.1HOLE

4.1

0.5

NC
3.1 ＋0.25－0.05

10.3±0.1

OP15.2±1.5

8.4

10.3

φ3.4±0.15NO
22.2±0.1

C● Simulated Hinge Lever
t0.6 STAINLESS PLATE

R3.2

MAX39

8.4

10.3
φ3.1HOLE

0.5

NC
3.1 ＋0.25－0.05

OP18.5±1.53
10.3±0.1PT

27.8
32.6±1.5

φ3.4±0.15NO
22.2±0.1

4.1

C

Tolerance : ± 0.4 mm

Sunmulon Co., Ltd.

VM-2

ORDERING CODE
Assembled PartVM
● ACTUATOR● OF
1Max. 3.92N

2Max. 1.96N

4

Max. 0.49N● RATINGS
1

15A

3

5A

● TERMINAL
Blank

Blank

Pin Plunger

DM1

Hinge Lever

DL1Long Hinged Lever

DM3

Simulated Hinge Lever● CONTACT MATERIAL

SolderingP＃187 Tab・Soldering

B

Screw

Blank
K

SilverSilver (Gold-Plated)

VM-11□□□, VM-13□□□, VM-21□□□, VM-23□□□, VM-43□□□ combinations only can be produced.
VM-41□□□ can not be produced.

TERMINALS
6.35

2-φ2.2 HOLE

4.75

φ2.4

R0.7

3.18

6.9

M2.6 Screw

1.2

0.5

10

7.1

Soldering Terminal#187 Tab・Soldering Terminal

Screw Terminal

PRECAUTIONS FOR CORRECT USE
1. Solder quickly and correctly at 380℃ max. and for 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 of the mounting nut when attaching to the panel should be 0.588 N･m or less with M3 screw.
4. When installing on a metal body, be sure to use a separator of 0.18 mm or more in thickness between the switch and the bodyof the switch insulation. Refer to the figure below for dimensions. A special separator (PM-8) is available for the VM.

10

15

12

10.3±0.15

13

26

39
22.2±0.15

10

PM-8

t 0.18※ For handling instructions and precautions other than the above, please refer to “Safety Precautions for All Micro Switches”.

Tolerance : ± 0.4 mm
As of March 2024

Sunmulon Co., Ltd.

VM-3

Safety Precautions for All Micro 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) Use within the specified range for switching speed and frequency. If the switching speed is extremely slow, the contacts may not be switched smoothly,
which may result in a contact failure or contact welding. Extremely fast switching speed may cause shock operation, resulting in premature breakdown.
If the switching frequency is too high, the contacts may not be able to keep up with the speed.
(3) Do not drop or otherwise apply strong force to the switch.
(4) Never modify or disassemble the switch as it may cause malfunction or accidents.
(5) Do not lubricate sliding parts such as actuators. It may penetrate into the inside of the actuator, resulting in malfunction.
(6) 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 Micro Switches(7) Type of Load vs. Inrush Currennt
Some types of load have a great difference between normal current and inrush current. Make sure that the inrush current is within the permissible value.
(a) Resistive load

A resistive load is a load with only a resistive component and a power factor of 1 (cos=1).
The ratings shown in the catalog are for this resistive load.

(b) Inductive load

Inductive loads such as transformers, solenoids, and relays generate reverse voltages, and the higher the voltage or the lower
the power factor of the load, the greater the reverse voltage and the greater the contact wear transition.

(c) Lamp load

If the lamp filament is switched on while it is cold, a transient current of 10 to 15 times the steady-state current flows,causing contact welding.
Current

Inrush Current

Type of Load
Motor

4 to 10 times higher than the steady-state current

Inductive

4 to 6 times higher than the steady-state current

Lamp

10 to 15 times higher than the steady-state current(8) Connection of different power supplies

Incorrect

200V

Load

100V

Do not design a circuit where voltage is imposed between contacts, otherwise contact weld may result.

(9) Terminology explained(a) Micro switch(b) Actuator

Micro switch is a small switch with a very small contact gap and snap-action mechanism
and with a contact structure that switches for a specified movement and specified movement and specified force
enclosed in a case with an actuator provided on the exterior of the case.
A part of a switch in which external force applied to it is transmitted by an internal spring mechanism to movethe movable contacts to open and close the switch.

(c) Free Position (FP)The initial position of the actuator when no external force is applied.

(d) Operating Position (OP)The position of the actuator at which the contacts snap to the operated contact position when external force
is applied from the position.

(e) Total Travel Position (TTP)The position of the actuator when it reaches the stopper.

(f) Release Position (RP)The position of the actuator at which the contacts snap from the operated contact position to their free position.

(g) Operating Force (OF)The force applied to the actuator required to operate the switch contacts from the free position to the operating position.

(h) Release Force (RF)The value to which the force on the actuator must be reduced to allow the contacts to return to the normal position.

(i) Pretravel (PT)The distance or angle through which the actuator moves from the free position to the operating position.

(j) Overtravel (OT)The distance or angle of the actuator movement beyond the operating position to the total travel position.

(k) Movement Differential (MD)The distance or angle of the actuator from the operating position to the releasing position.

(l) Total Travel (TT)The distance or angle of the actuator movement from the free position to the total travel position.

Actuator

Sunmulon Co., Ltd.

PRECAUTION-2

Safety Precautions for All Micro Switches(10) For inductive load, the arc by back EMF may cause contact failure. Insertion of arc prevention circuit as the following is recommended.
CircuitR

Element selection

Circuit

Diode

L

C

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(11) Following circuits show examples of an anti-chattering circuit.
VDD

VDD

R

R1

VOUT
SW

R2
VOUT

C

SW

R
VDD

(12) Wiring(a) Do not apply a soldering iron to the switch housing. Doing so may deform the terminals and cause defects.
(b) For soldering other than flux-preventive models, hand solder with the terminals facing down to prevent flux from penetrating into the switch.

Correct

Incorrect(c) 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.
(d) After wiring is completed, maintain an appropriate insulation distance.

(13) 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) Do not use the product in a place subject to vibration or shock. It may cause malfunction or damage.
(d) When checking the actual equipment, load conditions and operating environment should be the same as the actual operating conditions.
(e) The ambient temperature for storage is －25℃ to 65 ℃ (No freeze, no condensation).
(14) Store the product away from malignant gases, dust, high temperature and high humidity, and keep it in our packing condition.
(15) 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.
(16) Service scope
The price of Sunmulon products do not include the cost of services, such as dispatching technicians.

Sunmulon Co., Ltd.

PRECAUTION-3