36

Snap Action Switch

D2F

Precautions

Be sure to read the precautions and information common to all Snap Action and Detection Switches, contained in the Technical User’s Guide,

“Snap Action Switches, Technical Information” for correct use.

■ Correct Use

Mounting

Turn OFF the power supply before mounting or removing the switch,

wiring the switch, or performing maintenance or inspection. Failure to

do so may result in electric shock or burning.

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

may cause deformation of the switch, resulting in faulty operation or

breakage of the housing.

Allow sufficient insulation distance between terminals, terminal

traces and between terminals and ground.

Operating Stroke Setting

Take particular care in setting the operating stroke for the pin plunger

models. Make sure that the operating stroke is 70% to 100% of the

rated OT distance. Do not operate the actuator exceeding the OT

distance, otherwise the service life of the switch maybe decreased.

Using Microloads

Using a model for ordinary loads to switch microloads may result in

faulty operation. Instead, use the models that are designed for micro-

loads and that operate in the following range;

However, even when using microload models within the operating

range shown above, if inrush current or inductive voltage spikes

occur when the contact is opened or closed, it may increase contact

wear and so decrease the service life. Therefore, insert a contact

protection circuit where necessary.

■ Cautions

Terminal Connection

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

conductor into the terminal hole and then perform soldering.

Make sure that the capacity of the soldering iron is 30 W maximum

and that the temperature of the soldering tip is approximately 300

°C.

(350

°C maximum.) Complete soldering within 3 s. After soldering,

do not apply external force to the soldered area for about 1 minute.

Using a switch with improper soldering may result in abnormal heat-

ing, possibly resulting in a burn.

Applying the soldering iron for more than 3 s or using an iron that is

rated for more than 30 W may deteriorate the switch characteristics.

When soldering the lead wire to the PCB terminal, pay careful

attention so that the flux and solder liquid level does not exceed the

PCB level.

Operating range

for micro load

models D2F-01

Operating

range for

general-load

models

D2F

Current (mA)

Inoperable

range