Mounting

1.

Potting, sealing or adhesive compounds can produce chemical reactions in the SIOV ceramic

that will degrade the component’s electrical characteristics.

2.

Overloading SIOVs may result in ruptured packages and expulsion of hot materials. For this

reason SIOVs should be physically shielded from adjacent components.

Operation

1.

Use SIOVs only within the specified temperature operating range.

2.

Use SIOVs only within the specified voltage and current ranges.

3.

Environmental conditions must not harm SIOVs. Use SIOVs only in normal atmospheric con-

ditions. Avoid use in the presence of deoxidizing gases (chlorine gas, hydrogen sulfide gas,

ammonia gas, sulfuric acid gas etc), corrosive agents, humid or salty conditions. Avoid con-

tact with any liquids and solvents.

Housed varistors

ETFV25

ThermoFuse varistors, ETFV25 series

Page 9 of 10

Please read Cautions and warnings and

Important notes at the end of this document.