Panasonic Industry Co., Ltd. Electromechanical Control Business Division

industrial.panasonic.com/ac/e/

ASCTB412E 202301

Panasonic Industry Co., Ltd. 2023

GUIDELINES FOR POWER, HIGH-CAPACITY DC CUT OFF AND SAFETY RELAYS USAGE

■ Usage, Transport, and Storage Conditions

During usage, storage, or transportation, avoid locations

subjected to direct sunlight and maintain normal

temperature, humidity and pressure conditions.

●Temperature/Humidity/Pressure

When transporting or storing relays while they are tube

packaged, there are cases the temperature may differ

from the allowable range. In this case be sure to check

the individual specifications.

Also allowable humidity level is influenced by

temperature, please check charts shown below and

use relays within mentioned conditions. ( Allowable

temperature values differ for each relays, please refer

to the relay's individual specifications. )

1) Temperature:

The tolerance temperature range differs for

each relays, please refer to the relay's individual

specifications

2) Humidity: 5 to 85 % RH

5

85

Humidity (％ RH)

Avoid icing

when used at

temperatures

lower than 0°C

Avoid con-

densation when

used at tem-

peratures higher

than 0°C

Allowable range

Ambient temperature (℃)

085

-40

3) Pressure: 86 to 106 kPa

●Dew condensation

Condensation occurs when the ambient temperature

drops suddenly from a high temperature and humidity,

or the relay is suddenly transferred from a low ambient

temperature to a high temperature and humidity.

Condensation causes the failures like insulation

deterioration, wire disconnection and rust etc.

Panasonic Industry Co., Ltd. does not guarantee the

failures caused by condensation.

The heat conduction by the equipment may accelerate

the cooling of device itself, and the condensation may

occur.

Please conduct product evaluations in the worst

condition of the actual usage. ( Special attention should

be paid when high temperature heating parts are close

to the device. Also please consider the condensation

may occur inside of the device. )

●Icing

Condensation or other moisture may freeze on relays

when the temperature become lower than 0 ℃.This

icing causes the sticking of movable portion, the

operation delay and the contact conduction failure etc.

Panasonic Industry Co., Ltd. does not guarantee the

failures caused by the icing.

The heat conduction by the equipment may accelerate

the cooling of relay itself and the icing may occur.

Please conduct product evaluations in the worst

condition of the actual usage.

●Low temperature and low humidity

The plastic becomes brittle if the relay is exposed to a

low temperature, low humidity environment for long

periods of time.

●High temperature and high humidity

Storage for extended periods of time ( including

transportation periods ) at high temperature 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.

●Package

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.

●Silicon

When a source of silicone substances ( silicone rubber,

silicone oil, silicone coating materials and silicone filling

materials etc. ) is used around the relay, the silicone gas

( low molecular siloxane etc. ) may be produced.

This silicone gas may penetrate into the inside of the

relay. When the relay is kept and used in this condition,

silicone compound may adhere to the relay contacts

which may cause the contact failure. Do not use any

sources of silicone gas around the relay ( Including

plastic sealed types ).

●NOx Generation

When relay is used in an atmosphere high in humidity

to switch a load which easily produces an arc, the NOx

created by the arc and the water absorbed from outside

the relay combine to produce nitric acid.

This corrodes the internal metal parts and adversely

affects operation.

Avoid use at an ambient humidity of 85 % RH or higher

( at 20 ℃ ). If use at high humidity is unavoidable,

please contact our sales representative.

Ambient Environment

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