Technical Terminology & Cautions for Use

–5–

AECTB36E 201510-T

■ Usage, storage, and transport conditions

During usage, storage, or transportation, avoid locations subject

to direct sunlight and maintain normal temperature, humidity,

and pressure conditions.

The allowable specifications for environments suitable for usage,

storage, and transportation are given below.

1) Temperature: The allowable temperature range differs for

each switch, so refer to the switch’s individual specifications. In

addition, when transporting or storing switches while they are

tube packaged, there are cases when the temperature may differ

from the allowable range. In this situation, be sure to consult the

individual specifications.

2) Humidity: 5 to 85% R.H.

3) Pressure: 86 to 106 kPa

The humidity range varies with the temperature. Use within the

range indicated in the graph below.

(The allowable temperature depends on the switch.)

• Condensation will occur inside the switch if there is a sudden

change in ambient temperature when used in an atmosphere of

high temperature and high humidity. This is particularly likely to

happen when being transported by ship, so please be careful of

the atmosphere when shipping. Condensation is the

phenomenon whereby steam condenses to cause water

droplets that adhere to the switch when an atmosphere of high

temperature and humidity rapidly changes from a high to low

temperature or when the switch is quickly moved from a low

humidity location to one of high temperature and humidity.

Please be careful because condensation can cause adverse

conditions such as deterioration of insulation, coil cutoff, and

rust.

• Condensation or other moisture may freeze on the switch when

the temperatures is lower than 0°C 32°F. This causes problems

such as sticking of movable parts or operational time lags.

• The plastic becomes brittle if the switch is exposed to a low

temperature, low humidity environment for long periods of time.

• Storage for extended periods of time (including transportation

periods) at high temperatures or high humidity levels or in

atmospheres with organic gases or sulfide gases may cause a

sulfide film or oxide film to form on the surfaces of the contacts

and/or it may interfere with the functions. Check out the

atmosphere in which the units are to be stored and transported.

• In terms of the packing format used, make every effort to keep

the effects of moisture, organic gases and sulfide gases to the

absolute minimum.

■ We reserve the right to modify without notice the

materials, internal components, and other parts to improve

product quality.

■ Handling precautions

When handling the switches, be careful not to drop them on the

floor since this may damage them.

* Select contact sulfurization (clipping) prevention products (FS and Au-clad double

layer contacts) for use with extremely small loads or an environment-resistant

Turquoise switch.

■ Others

1) Failure modes of switches include short-circuiting, open-

circuiting and temperature rises. If this switch is to be used in

equipment where safety is a prime consideration, examine the

possible effects of these failures on the equipment concerned,

and ensure safety by providing protection circuits or protection

devices. In terms of the systems involved, make provision for

redundancy in the design and take steps to achieve safety

design.

2) The ambient operating temperature (and humidity) range

quoted is the range in which the switch can be operated on a

continuous basis: it does not mean that using the switch within

the rating guarantees the durability performance and

environment withstanding performance of the switch. For details

on the performance guarantee, check the specifications of each

product concerned.

Tolerance range

(Avoid

condensation when

used at temperatures

higher than 0

°C 32°F)

(Avoid freezing when

used at temperatures

lower than 0

°C 32°F)

85

5

–40

–40

0

+32

+85

+185

Temperature,

°C °F

Humidity, %R.H.