4

D2FD

Dust Proof Ultra Subminiature Basic Switch

Precautions

Refer to General Information.

● Degree of Protection

• Do not use the Switch under the environment where it is

exposed to water.

The degree of protection is IP6X and the protection against

water is not defined.

• Prevent the Switch from coming into contact with oil and

chemicals. Otherwise, damage to or deterioration of Switch

materials may result.

• Do not use the Switch in areas where it is exposed to silicon

adhesives, oil, or grease, otherwise faulty contact may result

due to the generation of silicon oxide.

• The environment-resistant performance of the switch differs

depending on operating loads, ambient atmospheres, and

installation conditions, etc. Please perform an operating test of

the switch in advance under actual usage conditions.

● Terminal Connection

• When soldering a lead wire to the terminal, first insert the lead

wire conductor into the terminal hole and then perform solder-

ing. Make sure that the capacity of the soldering iron is 30 W

maximum and that the temperature of the soldering iron tip is

approximately 300

°C. (350°C maximum.) Complete the sol-

dering within 3 s.

Using a switch with improper soldering may result in abnormal

heating, possibly resulting in burn.

Applying a soldering iron for more than 3 s or using one that is

rated at more than 30 W may deteriorate the switch character-

istics.

When using automatic soldering baths, we recommend solder-

ing at 260

± 5°C within 5 seconds. Make sure that the liquid

surface of the solder does not flow over the edge of the board.

● Mounting

• Turn OFF the power supply before mounting or removing the

Switch, wiring, or performing maintenance or inspection. Fail-

ure to do so may result in electric shock or burning.

• Use M2.3 mounting screws with plane washers or spring wash-

ers to securely mount the Switch. Tighten the screws to a torque

of 0.20 to 0.29 N

torque may result in deterioration of the sealing or damage.

Mount the Switch onto a flat surface. Mounting on an uneven

surface may cause deformation of the Switch, resulting in

faulty operation or damage.

● Operating Body

• Use an operating body with low frictional resistance and of a

shape that will not interfere with the sealing rubber, otherwise

the plunger may be damaged or the sealing may deteriorate.

With the pin plunger models, set the Switch so that the plunger can

be pushed in from directly above. Since the plunger is covered with

a rubber cap, applying a force from lateral directions may cause

damage to the plunger or reduction in the sealing capability.

● Handing

• Do not handle the Switch in a way that may cause damage to the

sealing rubber.

• When handling the Switch, ensure that uneven pressure or, as

shown in the following diagram, pressure in a direction other than

the operating direction is not applied to the Actuator, otherwise

the Actuator or Switch may be damaged, or durability may be

decreased.

● Using Micro Loads

Using a model for ordinary loads to open or close the contact of

a micro load circuit may result in faulty contact. Use models that

operate in the following range. However, even when using micro

load models within the operating range shown below, if inrush

current occurs when the contact is opened or closed, it may

increase contact wear and so decrease durability. Therefore,

insert a contact protection circuit where necessary.

The minimum applicable load is the N-level reference value. This

value indicates the malfunction reference level for the reliability

level of 60% (

indicates that the estimated malfunction rate is less than 1/

2,000,000 operations with a reliability level of 60%.

Cautions

Correct Use

Correct

Incorrect

Incorrect

Incorrect

Incorrect

Incorrect

Incorrect

30

24

12

5

0

1

10

100

1,000

Current (mA)

0.1

1 mA

Operating

range for

general-load

models

D2FD-2

16.6 mA

0.16 mA

100 mA

Operating range

for micro load

models D2FD-01

Inoperable

range